Checklist of the vascular plants of COLORADO
(excluding grasses and their allies)

ACERACEAE
Acer glabrum Torr.
  Rocky Mountain maple
Acer grandidentatum Nutt.
  bigtooth maple
Acer negundo L.
  boxelder
Acer negundo var. interius (Britt.) Sarg.
  boxelder maple
Acer negundo var. violaceum (Kirchn.) Jaeger
  boxelder

ADOXACEAE
Adoxa moschatellina L.
  muskroot

AGAVACEAE
Nolina texana S. Wats.
  Texas sacahuista
Yucca baccata Torr.
  banana yucca
Yucca glauca Nutt.
  small soapweed
Yucca harrimaniae Trel.
  Spanish bayonet

AIZOACEAE
Sesuvium verrucosum Raf.
  verrucose seapurslane

ALISMATACEAE
Alisma gramineum Lej.
  narrowleaf water plantain
Alisma triviale Pursh
  northern water plantain
Sagittaria calycina Engelm.
  hooded arrowhead
Sagittaria calycina var. calycina Engelm.
  hooded arrowhead
Sagittaria cuneata Sheldon
  arumleaf arrowhead
Sagittaria latifolia Willd.
  broadleaf arrowhead

AMARANTHACEAE
Amaranthus albus L.
  prostrate pigweed
Amaranthus arenicola I.M. Johnston
  sandhill amaranth
Amaranthus blitoides S. Wats.
  mat amaranth
Amaranthus hybridus L.
  slim amaranth
Amaranthus palmeri S. Wats.
  carelessweed
Amaranthus powellii S. Wats.
  Powell's amaranth
Amaranthus retroflexus L.
  redroot amaranth
Amaranthus wrightii S. Wats.
  Wright's amaranth
Froelichia floridana (Nutt.) Moq.
  plains snakecotton
Froelichia floridana var. campestris (Small) Fern.
  plains snakecotton
Froelichia gracilis (Hook.) Moq.
  slender snakecotton
Guilleminea densa (Humb. & Bonpl. ex Willd.) Moq.
  small matweed
Tidestromia lanuginosa (Nutt.) Standl.
  woolly tidestromia

ANACARDIACEAE
Rhus glabra L.
  smooth sumac
Rhus radicans var. rydbergii (Small ex Rydb.) Rehd.
  = Toxicodendron rydbergii
Rhus trilobata Nutt.
  skunkbush
Rhus trilobata var. pilosissima Engelm.
  pubescent squawbush
Rhus trilobata var. trilobata Nutt.
  skunkbush
Toxicodendron rydbergii (Small ex Rydb.) Greene
  western poison ivy

APOCYNACEAE
Amsonia jonesii Woods.
  Jones' bluestar
Apocynum X floribundum Greene (pro sp.)
  intermediate dogbane
Apocynum androsaemifolium L.
  spreading dogbane
Apocynum cannabinum L.
  Indianhemp
Apocynum medium Greene
  = Apocynum X floribundum
Apocynum suksdorfii Greene
  = Apocynum cannabinum

ARALIACEAE
Aralia nudicaulis L.
  wild sarsaparilla
Aralia racemosa L.
  American spikenard

ASCLEPIADACEAE
Asclepias arenaria Torr.
  sand milkweed
Asclepias asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias asperula ssp. asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias cryptoceras S. Wats.
  pallid milkweed
Asclepias engelmanniana Woods.
  Engelmann's milkweed
Asclepias hallii Gray
  Hall's milkweed
Asclepias incarnata L.
  swamp milkweed
Asclepias involucrata Engelm. ex Torr.
  dwarf milkweed
Asclepias latifolia (Torr.) Raf.
  broadleaf milkweed
Asclepias macrosperma Eastw.
  largeseed milkweed
Asclepias macrotis Torr.
  longhood milkweed
Asclepias oenotheroides Cham. & Schlecht.
  zizotes milkweed
Asclepias pumila (Gray) Vail
  plains milkweed
Asclepias speciosa Torr.
  showy milkweed
Asclepias stenophylla Gray
  slimleaf milkweed
Asclepias subverticillata (Gray) Vail
  whorled milkweed
Asclepias tuberosa L.
  butterfly milkweed, pleurisy root
Asclepias tuberosa ssp. interior Woods.
  butterfly milkweed, pleurisy root
Asclepias uncialis Greene
  wheel milkweed
Asclepias viridiflora Raf.
  green milkweed
Funastrum crispum (Benth.) Schlechter
  = Sarcostemma crispum
Sarcostemma crispum Benth.
  wavyleaf twinevine

ASPLENIACEAE
Asplenium adiantum-nigrum L.
  black spleenwort
Asplenium platyneuron (L.) B.S.P.
  ebony spleenwort
Asplenium resiliens Kunze
  blackstem spleenwort
Asplenium septentrionale (L.) Hoffmann
  forked spleenwort
Asplenium trichomanes L.
  maidenhair spleenwort
Asplenium trichomanes-ramosum L.
  brightgreen spleenwort

AZOLLACEAE
Azolla mexicana Schlecht. & Cham. ex K. Presl
  Mexican azolla

BALSAMINACEAE
Impatiens capensis Meerb.
  jewelweed

BERBERIDACEAE
Berberis aquifolium var. repens (Lindl.) Scoggan
  = Mahonia repens
Berberis fendleri Gray
  western barberry
Berberis fremontii Torr.
  = Mahonia fremontii
Berberis haematocarpa Woot.
  = Mahonia haematocarpa
Berberis repens Lindl.
  = Mahonia repens
Berberis vulgaris L.
  common barberry
Mahonia fremontii (Torr.) Fedde
  Fremont's mahonia
Mahonia haematocarpa (Woot.) Fedde
  red barberry
Mahonia repens (Lindl.) G. Don
  creeping Oregongrape

BETULACEAE
Alnus incana (L.) Moench
  mountain alder
Alnus incana ssp. tenuifolia (Nutt.) Breitung
  thinleaf alder
Betula nana L.
  bog birch
Betula occidentalis Hook.
  water birch
Betula papyrifera Marsh.
  paper birch
Corylus cornuta Marsh.
  beaked hazelnut

BIGNONIACEAE
Campsis radicans (L.) Seem. ex Bureau
  trumpet creeper

BORAGINACEAE
Amsinckia lycopsoides Lehm.
  tarweed fiddleneck
Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr.
  Menzies' fiddleneck
Anchusa azurea P. Mill.
  Italian bugloss
Anchusa officinalis L.
  common bugloss
Asperugo procumbens L.
  madwort
Buglossoides arvensis (L.) I.M. Johnston
  corn gromwell
Cryptantha ambigua (Gray) Greene
  basin catseye
Cryptantha aperta (Eastw.) Payson
  Grand Junction catseye
Cryptantha bakeri (Greene) Payson
  Baker's catseye
Cryptantha breviflora (Osterhout) Payson
  Uinta basin catseye
Cryptantha caespitosa (A. Nels.) Payson
  tufted catseye
Cryptantha cana (A. Nels.) Payson
  mountain catseye
Cryptantha celosioides (Eastw.) Payson
  buttecandle
Cryptantha cinerea (Greene) Cronq.
  James' catseye
Cryptantha cinerea var. jamesii Cronq.
  James' catseye
Cryptantha cinerea var. pustulosa (Rydb.) Higgins
  James' catseye
Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha crassisepala (Torr. & Gray) Greene
  thicksepal catseye
Cryptantha crassisepala var. crassisepala (Torr. & Gray) Greene
  thicksepal catseye
Cryptantha crassisepala var. elachantha I.M. Johnston
  thicksepal catseye
Cryptantha elata (Eastw.) Payson
  cliffdweller's catseye
Cryptantha fendleri (Gray) Greene
  sanddune catseye
Cryptantha flava (A. Nels.) Payson
  Brenda's yellow catseye
Cryptantha flavoculata (A. Nels.) Payson
  roughseed catseye
Cryptantha fulvocanescens (S. Wats.) Payson
  tawny catseye
Cryptantha gracilis Osterhout
  narrowstem catseye
Cryptantha humilis (Gray) Payson
  roundspike catseye
Cryptantha longiflora (A. Nels.) Payson
  longflower catseye
Cryptantha mensana (M.E. Jones) Payson
  southwestern catseye
Cryptantha minima Rydb.
  little catseye
Cryptantha osterhoutii (Payson) Payson
  Osterhout's catseye
Cryptantha paradoxa (A. Nels.) Payson
  handsome catseye
Cryptantha pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha recurvata Coville
  curvenut catseye
Cryptantha rollinsii I.M. Johnston
  Rollins' catseye
Cryptantha scoparia A. Nels.
  Pinyon Desert catseye
Cryptantha sericea (Gray) Payson
  silky catseye
Cryptantha stricta (Osterhout) Payson
  Yampa River catseye
Cryptantha thyrsiflora (Greene) Payson
  calcareous catseye
Cryptantha virgata (Porter) Payson
  miner's candle
Cryptantha watsonii (Gray) Greene
  Watson's catseye
Cryptantha weberi I.M. Johnston
  Weber's catseye
Cynoglossum officinale L.
  gypsyflower
Echium vulgare L.
  common vipersbugloss
Eritrichium Schrad. ex Gaudin
  alpine forget me not
Eritrichium nanum (Vill.) Schrad. ex Gaudin
  arctic alpine forget me not
Eritrichium nanum var. aretioides (Cham.) Herder
  alpine forget me not
Hackelia besseyi (Rydb.) J.L. Gentry
  Bessey's stickseed
Hackelia floribunda (Lehm.) I.M. Johnston
  manyflower stickseed
Hackelia gracilenta (Eastw.) I.M. Johnston
  Mesa Verde stickseed
Hackelia micrantha (Eastw.) J.L. Gentry
  Jessica sticktight
Heliotropium convolvulaceum (Nutt.) Gray
  phlox heliotrope
Heliotropium curassavicum L.
  salt heliotrope
Heliotropium curassavicum var. oculatum (Heller) I.M. Johnston
  seaside heliotrope
Lappula marginata (Bieb.) Guerke
  margined stickseed
Lappula occidentalis (S. Wats.) Greene
  flatspine stickseed
Lappula occidentalis var. occidentalis (S. Wats.) Greene
  desert stickseed
Lappula squarrosa (Retz.) Dumort.
  European stickseed
Lithospermum arvense L.
  = Buglossoides arvensis
Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM.
  hairy puccoon
Lithospermum caroliniense var. croceum (Fern.) Cronq.
  Carolina puccoon
Lithospermum incisum Lehm.
  narrowleaf gromwell
Lithospermum multiflorum Torr. ex Gray
  manyflowered gromwell
Lithospermum ruderale Dougl. ex Lehm.
  western gromwell
Mertensia alpina (Torr.) G. Don
  alpine bluebells
Mertensia brevistyla S. Wats.
  shortstyle bluebells
Mertensia ciliata (James ex Torr.) G. Don
  mountain bluebells
Mertensia franciscana Heller
  Franciscan bluebells
Mertensia fusiformis Greene
  spindleroot bluebells
Mertensia humilis Rydb.
  Rocky Mountain bluebells
Mertensia lanceolata (Pursh) DC.
  lanceleaf bluebells
Mertensia lanceolata var. lanceolata (Pursh) DC.
  prairie bluebells
Mertensia lanceolata var. nivalis (S. Wats.) Higgins
  greenleaf bluebells
Mertensia oblongifolia (Nutt.) G. Don
  oblongleaf bluebells
Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja
  Asian forget me not
Myosotis scorpioides L.
  true forget me not
Onosmodium molle Michx.
  smooth onosmodium
Onosmodium molle ssp. occidentale (Mackenzie) Cochrane
  western onosmodium
Oreocarya
  = Cryptantha
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys scouleri var. hispidulus (Greene) Dorn
  sleeping popcornflower
Symphytum officinale L.
  common comfrey
Tiquilia nuttallii (Hook.) A. Richards.
  Nuttall's coldenia

CACTACEAE
Coryphantha 
  = Escobaria 
Echinocereus coccineus Engelm.
  scarlet hedgehog cactus
Echinocereus coccineus var. coccineus Engelm.
  scarlet hedgehog cactus
Echinocereus fendleri (Engelm.) F. Seitz
  pinkflower hedgehog cactus
Echinocereus reichenbachii (Terscheck ex Walp.) Haage f.
  lace hedgehog cactus
Echinocereus reichenbachii var. perbellus (Britt. & Rose) L. Benson
  lace hedgehog cactus
Echinocereus triglochidiatus Engelm.
  kingcup cactus
Echinocereus triglochidiatus var. triglochidiatus Engelm.
  kingcup cactus
Echinocereus viridiflorus Engelm.
  nylon hedgehog cactus
Escobaria missouriensis (Sweet) D.R. Hunt
  Missouri foxtail cactus
Escobaria missouriensis var. missouriensis (Sweet) D.R. Hunt
  Missouri foxtail cactus
Escobaria vivipara (Nutt.) Buxbaum
  spinystar
Escobaria vivipara var. vivipara (Nutt.) Buxbaum
  spinystar
Opuntia erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. utahensis (Engelm.) L. Benson
  Utah grizzlybear pricklypear
Opuntia fragilis (Nutt.) Haw.
  brittle pricklypear
Opuntia fragilis var. brachyarthra (Engelm. & Bigelow) Coult.
  brittle pricklypear
Opuntia fragilis var. fragilis (Nutt.) Haw.
  pygmy pricklypear
Opuntia heacockiae Arp
  Heacock's pricklypear
Opuntia imbricata (Haw.) DC.
  tree cholla
Opuntia imbricata var. imbricata (Haw.) DC.
  tree cholla
Opuntia macrorhiza Engelm.
  twistspine pricklypear
Opuntia phaeacantha Engelm.
  tulip pricklypear
Opuntia phaeacantha var.camanchica(Engelm. & Bigelow)L. Benson
  tulip pricklypear
Opuntia phaeacantha var. major Engelm.
  Mojave pricklypear
Opuntia polyacantha Haw.
  plains pricklypear
Opuntia polyacantha var. polyacantha Haw.
  hairspine pricklypear
Opuntia polyacantha var. rufispina (Engelm. & Bigelow ex Engelm.) L. Benson
  hairspine pricklypear
Opuntia whipplei Engelm. & Bigelow
  Whipple cholla
Opuntia whipplei var. whipplei Engelm. & Bigelow
  Whipple cholla
Pediocactus glaucus (J.A. Purpus ex K. Schum.) Arp
  = Sclerocactus glaucus
Pediocactus simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus
Pediocactus simpsonii var. minor (Engelm.) Cockerell
  snowball cactus
Pediocactus simpsonii var. simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus
Sclerocactus glaucus (J.A. Purpus ex K. Schum.) L. Benson
  Uinta Basin hookless cactus
Sclerocactus mesae-verdae (Boissevain ex Boissevain & C. Davids.) L. Benson
  Mesa Verde fishhook cactus
Sclerocactus parviflorus Clover & Jotter
  smallflower fishhook cactus

CALLITRICHACEAE
Callitriche hermaphroditica L.
  northern waterstarwort

CAMPANULACEAE
Campanula aparinoides Pursh
  marsh bellflower
Campanula parryi Gray
  Parry's bellflower
Campanula rapunculoides L.
  rampion bellflower
Campanula rotundifolia L.
  bluebell bellflower
Campanula uniflora L.
  arctic bellflower
Heterocodon rariflorum Nutt.
  rareflower heterocodon
Lobelia cardinalis L.
  cardinalflower
Lobelia cardinalis ssp. graminea (Lam.) McVaugh
  cardinalflower
Lobelia siphilitica L.
  great blue lobelia
Lobelia siphilitica var. ludoviciana A. DC.
  great blue lobelia
Triodanis Raf. ex Greene
  Venus' lookingglass
Triodanis holzingeri McVaugh
  Holzinger's Venus' lookingglass
Triodanis leptocarpa (Nutt.) Nieuwl.
  slimpod Venus' lookingglass
Triodanis perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass

CANNABACEAE
Cannabis sativa L.
  marijuana
Humulus americanus Nutt.
  = Humulus lupulus var. lupuloides
Humulus lupulus L.
  common hop
Humulus lupulus var. lupuloides E. Small
  American hop

CAPPARACEAE
Cleome lutea Hook.
  yellow spiderflower
Cleome multicaulis DC.
  slender spiderflower
Cleome serrulata Pursh
  Rocky Mountain beeplant
Cleomella angustifolia Torr.
  narrowleaf rhombopod
Cleomella palmeriana M.E. Jones
  Rocky Mountain stickweed
Polanisia dodecandra (L.) DC.
  roughseed clammyweed
Polanisia jamesii (Torr. & Gray) Iltis
  James' clammyweed

CAPRIFOLIACEAE
Linnaea borealis L.
  twinflower
Linnaea borealis ssp. longiflora (Torr.) Hulten
  longtube twinflower
Lonicera involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera morrowii Gray
  Morrow's honeysuckle
Lonicera tatarica L.
  Tatarian honeysuckle
Sambucus canadensis L.
  = Sambucus nigra ssp. canadensis
Sambucus cerulea Raf.
  = Sambucus nigra ssp. cerulea
Sambucus glauca Nutt.
  = Sambucus nigra ssp. cerulea
Sambucus mexicana K. Presl ex DC.
  = Sambucus nigra ssp. canadensis
Sambucus nigra L.
  European black elder
Sambucus nigra ssp. canadensis (L.) R. Bolli
Sambucus nigra ssp. cerulea (Raf.) R. Bolli
Sambucus racemosa L.
  scarlet elderberry
Sambucus racemosa ssp. pubens var. microbotrys (Rydb.) Kearney & Peebles
  European red elderberry
Symphoricarpos albus (L.) Blake
  common snowberry
Symphoricarpos longiflorus Gray
  desert snowberry
Symphoricarpos occidentalis Hook.
  western snowberry
Symphoricarpos rotundifolius Gray
  roundleaf snowberry
Viburnum edule (Michx.) Raf.
  mooseberry viburnum
Viburnum lantana L.
  wayfaringtree
Viburnum lentago L.
  nannyberry

CARYOPHYLLACEAE
Arenaria fendleri Gray
  Fendler's sandwort
Arenaria fendleri var. fendleri Gray
  Fendler's sandwort
Arenaria hookeri Nutt.
  Hooker's sandwort
Arenaria hookeri ssp. desertorum (Maguire) W.A. Weber
  Hooker's desert sandwort
Arenaria hookeri ssp. hookeri Nutt.
  Hooker's sandwort
Arenaria hookeri ssp. pinetorum (A. Nels.) W.A. Weber
  Hooker's sandwort
Arenaria kingii (S. Wats.) M.E. Jones
  King's sandwort
Arenaria kingii ssp. uintahensis (A. Nels.) Maguire
  Uinta sandwort
Arenaria lanuginosa (Michx.) Rohrb.
  spreading sandwort
Arenaria lanuginosa ssp. saxosa (Gray) Maguire
  spreading sandwort
Arenaria lateriflora L.
  = Moehringia lateriflora
Cerastium arvense L.
  field chickweed
Cerastium arvense ssp. strictum (L.) Ugborogho
  field chickweed
Cerastium beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium beeringianum ssp. earlei (Rydb.) Hulten
  Earl's chickweed
Cerastium brachypodum (Engelm. ex Gray) B.L. Robins.
  shortstalk chickweed
Cerastium fontanum Baumg.
  common chickweed
Dianthus armeria L.
  Deptford pink
Dianthus deltoides L.
  maiden pink
Drymaria effusa Gray
  pinewoods drymary
Drymaria effusa var. depressa (Greene) J. Duke
  pinewoods drymary
Gypsophila elegans Bieb.
  showy babysbreath
Gypsophila paniculata L.
  babysbreath gypsophila
Gypsophila scorzonerifolia Ser.
  garden babysbreath
Holosteum umbellatum L.
  jagged chickweed
Minuartia macrantha (Rydb.) House
  House's stitchwort
Minuartia nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia nuttallii ssp. nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia obtusiloba (Rydb.) House
  twinflower sandwort
Minuartia rubella (Wahlenb.) Hiern
  beautiful sandwort
Minuartia stricta (Sw.) Hiern
  bog stitchwort
Moehringia lateriflora (L.) Fenzl
  bluntleaf sandwort
Moehringia macrophylla (Hook.) Fenzl
  largeleaf sandwort
Paronychia jamesii Torr. & Gray
  James' nailwort
Paronychia pulvinata Gray
  Rocky Mountain nailwort
Paronychia sessiliflora Nutt.
  creeping nailwort
Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartman
  tuber starwort
Sagina saginoides (L.) Karst.
  arctic pearlwort
Saponaria officinalis L.
  bouncingbet
Saponaria vaccaria L.
  = Vaccaria hispanica
Silene acaulis (L.) Jacq.
  moss campion
Silene acaulis var. subacaulescens (F.N. Williams) Fern. & St. John
  moss campion
Silene antirrhina L.
  sleepy silene
Silene csereii Baumg.
  Balkan catchfly
Silene dichotoma Ehrh.
  dichotoma silene
Silene dioica (L.) Clairville
  red catchfly
Silene drummondii Hook.
  Drummond's campion
Silene drummondii var. drummondii Hook.
  Drummond's campion
Silene gallica L.
  common catchfly
Silene kingii (S. Wats.) Bocquet
  King's campion
Silene menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii var. menziesii Hook.
  Menzies' campion
Silene noctiflora L.
  nightflowering silene
Silene scouleri Hook.
  Scouler's campion
Silene scouleri ssp. hallii (S. Wats.) C.L. Hitchc. & Maguire
  Hall's catchfly
Silene uralensis (Rupr.) Bocquet
  apetalous catchfly
Silene uralensis ssp. uralensis (Rupr.) Bocquet
  mountain campion
Silene vulgaris (Moench) Garcke
  maidenstears
Spergula arvense L.
  corn spurry
Spergularia maritima (All.) Chiov.
  media sandspurry
Spergularia rubra (L.) J.& K. Presl
  red sandspurry
Stellaria calycantha (Ledeb.) Bong.
  northern starwort
Stellaria crassifolia Ehrh.
  fleshy starwort
Stellaria graminea L.
  grasslike starwort
Stellaria irrigua Bunge
  Colorado starwort
Stellaria jamesiana Torr.
  = Pseudostellaria jamesiana
Stellaria longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longipes Goldie
  longstalk starwort
Stellaria media (L.) Vill.
  common chickweed
Stellaria media ssp. media (L.) Vill.
  common chickweed
Stellaria obtusa Engelm.
  Rocky Mountain chickweed
Stellaria umbellata Turcz. ex Kar. & Kir.
  umbrella starwort
Vaccaria hispanica (P. Mill.) Rauschert
  cow soapwort
Vaccaria vaccaria (L.) Britt.
  = Vaccaria hispanica

CELASTRACEAE
Paxistima myrsinites (Pursh) Raf.
  boxleaf myrtle

CERATOPHYLLACEAE
Ceratophyllum demersum L.
  coon's tail

CHENOPODIACEAE
Atriplex argentea Nutt.
  silverscale saltbush
Atriplex canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex canescens var. canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex confertifolia (Torr. & Frem.) S. Wats.
  shadscale saltbush
Atriplex corrugata S. Wats.
  mat saltbush
Atriplex gardneri (Moq.) D. Dietr.
  Gardner's saltbush
Atriplex garrettii Rydb.
  Garrett's saltbush
Atriplex graciliflora M.E. Jones
  slenderflower saltbush
Atriplex hortensis L.
  garden orache
Atriplex obovata Moq.
  mound saltbush
Atriplex patula L.
  spear saltbush
Atriplex powellii S. Wats.
  Powell's saltweed
Atriplex prostrata Boucher ex DC.
  triangle orache
Atriplex rosea L.
  tumbling saltweed
Atriplex saccaria S. Wats.
  sack saltbush
Atriplex truncata (Torr. ex S. Wats.) Gray
  wedgescale saltbush
Atriplex wolfii S. Wats.
  Wolf's saltweed
Axyris amaranthoides L.
  Russian pigweed
Bassia hyssopifolia (Pallas) Kuntz
  fivehorn smotherweed
Chenopodium album L.
  lambsquarters
Chenopodium ambrosioides L.
  Mexican tea
Chenopodium ambrosioides var. ambrosioides L.
  Mexican tea
Chenopodium atrovirens Rydb.
  pinyon goosefoot
Chenopodium berlandieri Moq.
  pitseed goosefoot
Chenopodium botrys L.
  Jerusalem oak goosefoot
Chenopodium capitatum (L.) Ambrosi
  blite goosefoot
Chenopodium cycloides A. Nels.
  sandhill goosefoot
Chenopodium desiccatum A. Nels.
  aridland goosefoot
Chenopodium foliosum (Moench) Aschers.
  leafy goosefoot
Chenopodium fremontii S. Wats.
  Fremont's goosefoot
Chenopodium glaucum L.
  oakleaf goosefoot
Chenopodium graveolens Willd.
  fetid goosefoot
Chenopodium hians Standl.
  hians goosefoot
Chenopodium incanum (S. Wats.) Heller
  mealy goosefoot
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
  narrowleaf goosefoot
Chenopodium pratericola Rydb.
  desert goosefoot
Chenopodium rubrum L.
  red goosefoot
Chenopodium simplex (Torr.) Raf.
  mapleleaf goosefoot
Chenopodium subglabrum (S. Wats.) A. Nels.
  smooth goosefoot
Chenopodium watsonii A. Nels.
  Watson's goosefoot
Corispermum hyssopifolium L.
  common bugseed
Cycloloma atriplicifolium (Spreng.) Coult.
  winged pigweed
Endolepis dioica (Nutt.) Standl.
Eurotia lanata (Pursh) Moq.
  = Krascheninnikovia lanata
Grayia spinosa (Hook.) Moq.
  spiny hopsage
Halogeton glomeratus (Bieb.) C.A. Mey.
  halogeton
Kochia americana S. Wats.
  greenmolly
Krascheninnikovia lanata (Pursh) Guldenstaedt
  winterfat
Monolepis nuttalliana (J.A. Schultes) Greene
  Nuttall's povertyweed
Monolepis pusilla Torr. ex S. Wats.
  small monolepis
Proatriplex pleiantha (W.A. Weber) Stutz & Chu
  Mancos shadscale
Salicornia rubra A. Nels.
  red swampfire
Salsola collina Pallas
  slender Russian thistle
Sarcobatus vermiculatus (Hook.) Torr.
  greasewood
Suaeda calceoliformis (Hook.) Moq.
  Pursh seepweed
Suaeda moquinii (Torr.) Greene
  Mojave seablite
Suckleya suckleyana (Torr.) Rydb.
  poison suckleya
Zuckia brandegei (Gray) Welsh & Stutz ex Welsh
  siltbush

CISTACEAE
Helianthemum bicknellii Fern.
  hoary frostweed

CLUSIACEAE
Hypericum majus (Gray) Britt.
  large St. Johnswort
Hypericum perforatum L.
  common St. Johnswort
Hypericum scouleri Hook.
  Scouler's St. Johnswort

COMMELINACEAE
Commelina dianthifolia Delile
  birdbill dayflower
Commelina erecta L.
  whitemouth dayflower
Commelina erecta var. angustifolia (Michx.) Fern.
  whitemouth dayflower
Tradescantia occidentalis (Britt.) Smyth
  prairie spiderwort
Tradescantia occidentalis var. scopulorum (Rose) E.S. Anderson & Woods.
  prairie spiderwort

COMPOSITAE
Achillea lanulosa Nutt.
  = Achillea millefolium var. occidentalis
Achillea millefolium L.
  common yarrow
Achillea millefolium var. occidentalis DC.
  western yarrow
Acroptilon repens (L.) DC.
  hardheads
Ageratina herbacea (Gray) King & H.E. Robins.
  fragrant snakeroot
Agoseris aurantiaca (Hook.) Greene
  orange agoseris
Agoseris glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. agrestis (Osterhout) Q. Jones ex Cronq.
  pale agoseris
Agoseris glauca var. dasycephala (Torr. & Gray) Jepson
  pale agoseris
Agoseris glauca var. glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. laciniata (D.C. Eat.) Smiley
  false agoseris
Agoseris heterophylla (Nutt.) Greene
  annual agoseris
Almutaster pauciflorus (Nutt.) A.& D. Love
Ambrosia acanthicarpa Hook.
  flatspine burr ragweed
Ambrosia artemisiifolia L.
  annual ragweed
Ambrosia artemisiifolia var. elatior (L.) Descourtils
  annual ragweed
Ambrosia confertiflora DC.
  weakleaf burr ragweed
Ambrosia grayi (A. Nels.) Shinners
  woollyleaf burr ragweed
Ambrosia linearis (Rydb.) Payne
  streaked burr ragweed
Ambrosia psilostachya DC.
  Cuman ragweed
Ambrosia tomentosa Nutt.
  skeletonleaf burr ragweed
Ambrosia trifida L.
  great ragweed
Anaphalis margaritacea (L.) Benth. & Hook. f.
  western pearlyeverlasting
Antennaria anaphaloides Rydb.
  pearly pussytoes
Antennaria corymbosa E. Nels.
  flattop pussytoes
Antennaria dioica var. corymbosa (E. Nels.) Jepson
  = Antennaria corymbosa
Antennaria howellii Greene
  Howell's pussytoes
Antennaria howellii ssp. neodioica (Greene) Bayer
  field pussytoes
Antennaria luzuloides Torr. & Gray
  rush pussytoes
Antennaria marginata Greene
  whitemargin pussytoes
Antennaria media Greene
  Rocky Mountain pussytoes
Antennaria microphylla Rydb.
  littleleaf pussytoes
Antennaria parvifolia Nutt.
  smallleaf pussytoes
Antennaria rosea Greene
  rosy pussytoes
Antennaria rosulata Rydb.
  Kaibab pussytoes
Antennaria umbrinella Rydb.
  umber pussytoes
Anthemis arvensis L.
  corn chamomile
Anthemis cotula L.
  stinking chamomile
Arctium lappa L.
  greater burrdock
Arctium minus Bernh.
  lesser burrdock
Arctium tomentosum P. Mill.
  woolly burrdock
Arnica angustifolia Vahl
  narrowleaf arnica
Arnica angustifolia ssp. tomentosa (Macoun) G.W. & G.R. Dougl.
  narrowleaf arnica
Arnica chamissonis Less.
  chamisso arnica
Arnica chamissonis ssp. foliosa (Nutt.) Maguire
  chamisso arnica
Arnica cordifolia Hook.
  heartleaf arnica
Arnica fulgens Pursh
  foothill arnica
Arnica latifolia Bong.
  broadleaf arnica
Arnica longifolia D.C. Eat.
  spearleaf arnica
Arnica mollis Hook.
  hairy arnica
Arnica parryi Gray
  Parry's arnica
Arnica rydbergii Greene
  Rydberg's arnica
Artemisia abrotanum L.
  southernwood
Artemisia absinthium L.
  wormwood
Artemisia annua L.
  sweet annie
Artemisia arbuscula Nutt.
  low sagebrush
Artemisia arbuscula ssp. longiloba (Osterhout) L. Shultz
  alkali sagebrush
Artemisia arctica Less.
  boreal sagebrush
Artemisia arctica ssp. saxicola (Rydb.) Hulten
  arctic wormwood
Artemisia biennis Willd.
  biennial wormwood
Artemisia bigelovii Gray
  Bigelow's sagebrush
Artemisia campestris L.
  field sagewort
Artemisia campestris ssp. borealis (Pallas) Hall & Clements
  northern sagewort
Artemisia campestris ssp. borealis var. purshii (Hook.) Cronq.
  Pursh's wormwood
Artemisia campestris ssp. caudata (Michx.) Hall & Clements
  field wormwood
Artemisia campestris ssp. pacifica (Nutt.) Hall & Clements
  Pacific wormwood
Artemisia cana Pursh
  silver sagebrush
Artemisia cana ssp. cana Pursh
  silver sagebrush
Artemisia carruthii Wood ex Carruth.
  Carruth's sagewort
Artemisia dracunculus L.
  wild tarragon
Artemisia dracunculus ssp. dracunculus L.
  Russian tarragon
Artemisia dracunculus ssp. glauca (Pallas ex Willd.) Hall & Clements
  wild tarragon
Artemisia filifolia Torr.
  sand sagebrush
Artemisia franserioides Greene
  ragweed sagebrush
Artemisia frigida Willd.
  fringed sagewort
Artemisia longifolia Nutt.
  longleaf sagebrush
Artemisia ludoviciana Nutt.
  estafiate
Artemisia ludoviciana ssp. albula (Woot.) Keck
  white sagebrush
Artemisia ludoviciana ssp. incompta (Nutt.) Keck
  mountain sagewort
Artemisia ludoviciana ssp. ludoviciana Nutt.
  foothill sagewort
Artemisia ludoviciana ssp. mexicana (Willd. ex Spreng.) Keck
  estafiate
Artemisia michauxiana Bess.
  Michaux's sagebrush
Artemisia nova A. Nels.
  black sagebrush
Artemisia parryi Gray
  Parry's wormwood
Artemisia pattersonii Gray
  Patterson's wormwood
Artemisia pedatifida Nutt.
  birdfoot sagebrush
Artemisia pygmaea Gray
  pygmy sagebrush
Artemisia scopulorum Gray
  alpine sagebrush
Artemisia spinescens D.C. Eat.
  bud sagebrush
Artemisia tridentata Nutt.
  big sagebrush
Artemisia tridentata ssp. tridentata Nutt.
  basin big sagebrush
Artemisia tridentata ssp. vaseyana (Rydb.) Beetle
  mountain big sagebrush
Artemisia tridentata ssp. wyomingensis Beetle & Young
  Wyoming big sagebrush
Artemisia tripartita Rydb.
  threetip sagebrush
Artemisia tripartita ssp. tripartita Rydb.
  Idaho threetip sagebrush
Artemisia vulgaris var. ludoviciana (Nutt.) Kuntze
  = Artemisia ludoviciana ssp. ludoviciana
Aster X amethystinus Nutt. (pro sp.)
  amethyst aster
Aster alpinus L.
  alpine aster
Aster ascendens Lindl.
  Chile aster
Aster bigelovii Gray
  = Machaeranthera bigelovii var. bigelovii
Aster borealis (Torr. & Gray) Prov.
  rush aster
Aster bracteolatus Nutt. (pro sp.)
  bract aster
Aster campestris Nutt.
  meadow aster
Aster campestris var. campestris Nutt.
  western meadow aster
Aster engelmannii (D.C. Eat.) Gray
  = Eucephalus engelmannii
Aster ericoides L.
  heath aster
Aster ericoides var. ericoides L.
  heath aster
Aster falcatus Lindl.
  cluster aster
Aster falcatus var. falcatus Lindl.
  cluster aster
Aster fendleri Gray
  Fendler's aster
Aster foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster foliaceus var. foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster glaucodes Blake
  gray aster
Aster glaucodes var. glaucodes Blake
  gray aster
Aster laevis L.
  smooth aster
Aster laevis var. geyeri Gray
  Geyer's smooth aster
Aster lanceolatus Willd.
  white panicle aster
Aster lanceolatus ssp. hesperius (Gray) Semple & Chmielewski
  Siskiyou aster
Aster novae-angliae L.
  New England aster
Aster oblongifolius Nutt.
  aromatic aster
Aster occidentalis (Nutt.) Torr. & Gray
  western aster
Aster occidentalis var. occidentalis (Nutt.) Torr. & Gray
  western aster
Aster perelegans A. Nels. & J.F. Macbr.
  elegant aster
Aster porteri Gray
  Porter's aster
Aster ptarmicoides (Nees) Torr. & Gray
  = Oligoneuron album
Baccharis salicina Torr. & Gray
  Great Plains falsewillow
Baccharis wrightii Gray
  Wright's baccharis
Bahia dissecta (Gray) Britt.
  ragleaf bahia
Balsamita major Desf.
  costmary
Balsamorhiza hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza hookeri var. hispidula (Sharp) Cronq.
  hairy balsamroot
Balsamorhiza sagittata (Pursh) Nutt.
  arrowleaf balsamroot
Berlandiera lyrata Benth.
  lyreleaf greeneyes
Bidens bigelovii Gray
  Bigelow's beggarticks
Bidens cernua L.
  nodding beggartick
Bidens frondosa L.
  devil's beggartick
Bidens tenuisecta Gray
  slimlobe beggarticks
Bidens tripartita L.
  threelobe beggarticks
Brachyactis ciliata (Ledeb.) Ledeb.
  alkali rayless aster
Brachyactis ciliata ssp. angusta (Lindl.) A.G. Jones
  alkali rayless aster
Brachyactis frondosa (Nutt.) Gray
  leafy rayless aster
Brickellia brachyphylla (Gray) Gray
  plumed brickellbush
Brickellia californica (Torr. & Gray) Gray
  California brickellbush
Brickellia eupatorioides (L.) Shinners
  false boneset
Brickellia eupatorioides var.chlorolepis (Woot. & Standl.)B.L. Turner
  false boneset
Brickellia grandiflora (Hook.) Nutt.
  tasselflower brickellbush
Brickellia longifolia S. Wats.
  longleaf brickellbush
Brickellia microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia microphylla var. scabra Gray
  rough brickellbush
Brickellia oblongifolia Nutt.
  Mojave brickellbush
Carduus acanthoides L.
  spiny plumeless thistle
Carduus nutans L.
  nodding plumeless thistle
Carduus nutans ssp. macrolepis (Peterm.) Kazmi
  nodding plumeless thistle
Carthamus tinctorius L.
  safflower
Centaurea biebersteinii DC.
  spotted knapweed
Centaurea cyanus L.
  garden cornflower
Centaurea diffusa Lam.
  white knapweed
Centaurea eriophora L.
  wild sandheath
Centaurea repens L.
  = Acroptilon repens
Centaurea solstitialis L.
  yellow star thistle
Chaenactis douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis douglasii var. alpina Gray
  alpine dustymaiden
Chaenactis stevioides Hook. & Arn.
  Steve's dustymaiden
Chaetopappa ericoides (Torr.) Nesom
  rose heath
Chamaechaenactis scaposa (Eastw.) Rydb.
  fullstem
Chrysanthemum balsamita (L.) Baill., non L.
  = Balsamita major
Chrysanthemum coccineum Willd.
  pyrethum daisy
Chrysanthemum coronarium L.
  crowndaisy
Chrysanthemum leucanthemum L.
  = Leucanthemum vulgare
Chrysanthemum parthenium (L.) Bernh.
  = Tanacetum parthenium
Chrysothamnus depressus Nutt.
  longflower rabbitbrush
Chrysothamnus graveolens (Nutt.) Greene
  = Ericameria nauseosa ssp. nauseosa var. glabrata
Chrysothamnus greenei (Gray) Greene
  Greene's rabbitbrush
Chrysothamnus linifolius Greene
  spearleaf rabbitbrush
Chrysothamnus nauseosus 
  = Ericameria nauseosa 
Chrysothamnus parryi 
  = Ericameria parryi 
Chrysothamnus pulchellus (Gray) Greene
  southwestern rabbitbrush
Chrysothamnus pulchellus ssp. baileyi (Woot. & Standl.) Hall & Clements
  Bailey's rabbitbrush
Chrysothamnus vaseyi (Gray) Greene
  Vasey's rabbitbrush
Chrysothamnus viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. axillaris (Keck) L.C. Anders.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. lanceolatus (Nutt.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. puberulus (D.C. Eat.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus var. stenophyllus (Gray) Hall
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Cichorium intybus L.
  chicory
Cirsium araneans Rydb.
  jeweled thistle
Cirsium arvense (L.) Scop.
  Canadian thistle
Cirsium barnebyi Welsh & Neese
  Barneby's thistle
Cirsium calcareum (M.E. Jones) Woot. & Standl.
  Cainville thistle
Cirsium canescens Nutt.
  prairie thistle
Cirsium eatonii (Gray) B.L. Robins.
  Eaton's thistle
Cirsium eatonii var. eatonii (Gray) B.L. Robins.
  Eaton's thistle
Cirsium flodmanii (Rydb.) Arthur
  Flodman's thistle
Cirsium neomexicanum Gray
  New Mexico thistle
Cirsium ochrocentrum Gray
  yellowspine thistle
Cirsium ownbeyi Welsh
  Ownbey's thistle
Cirsium pallidum Woot. & Standl.
  pale thistle
Cirsium parryi (Gray) Petrak
  Parry's thistle
Cirsium perplexans (Rydb.) Petrak
  Rocky Mountain thistle
Cirsium scapanolepis Petrak
  mountain slope thistle
Cirsium scopulorum (Greene) Cockerell ex Daniels
  mountain thistle
Cirsium tioganum (Congd.) Petrak
  stemless thistle
Cirsium tioganum var. coloradense (Rydb.) Dorn
  Colorado thistle
Cirsium undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium undulatum var. tracyi (Rydb.) Welsh
  Tracy's thistle
Cirsium vulgare (Savi) Ten.
  bull thistle
Conyza canadensis (L.) Cronq.
  Canadian horseweed
Conyza coulteri Gray
  = Laennecia coulteri
Coreopsis lanceolata L.
  lanceleaf tickseed
Coreopsis tinctoria Nutt.
  golden tickseed
Cosmos bipinnatus Cav.
  garden cosmos
Cosmos parviflorus (Jacq.) Pers.
  southwestern cosmos
Crepis acuminata Nutt.
  longleaf hawksbeard
Crepis acuminata ssp. acuminata Nutt.
  longleaf hawksbeard
Crepis atribarba Heller
  slender hawksbeard
Crepis atribarba ssp. atribarba Heller
  slender hawksbeard
Crepis capillaris Wallr.
  smooth hawksbeard
Crepis intermedia Gray
  limestone hawksbeard
Crepis modocensis Greene
  Siskiyou hawksbeard
Crepis modocensis ssp. modocensis Greene
  Modoc hawksbeard
Crepis nana Richards.
  dwarf alpine hawksbeard
Crepis nana ssp. nana Richards.
  dwarf alpine hawksbeard
Crepis occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. costata (Gray) Babcock & Stebbins
  largeflower hawksbeard
Crepis occidentalis ssp. occidentalis Nutt.
  largeflower hawksbeard
Crepis runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis runcinata ssp. runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Dicoria canescens Gray
  desert twinbugs
Dicoria canescens ssp. brandegei (Gray) Kartesz, comb. nov. ined.
Dugaldia hoopesii (Gray) Rydb.
  = Hymenoxys hoopesii
Dyssodia papposa (Vent.) A.S. Hitchc.
  fetid marigold
Echinacea angustifolia DC.
  blacksamson echinacea
Echinops sphaerocephalus L.
  great globethistle
Enceliopsis nudicaulis (Gray) A. Nels.
  nakedstem sunray
Enceliopsis nutans (Eastw.) A. Nels.
  nodding sunray
Engelmannia pinnatifida Gray ex Nutt.
  Engelmann's daisy
Ericameria depressa (Nutt.) L.C. Anders.
  = Chrysothamnus depressus
Ericameria discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria discoidea var. discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. consimilis (Greene) Nesom & Baird
Ericameria nauseosa ssp. consimilis var. leiosperma 
Ericameria nauseosa ssp. consimilis var. oreophila 
Ericameria nauseosa ssp. nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa var. bigelovii 
Ericameria nauseosa ssp. nauseosa var. glabrata 
Ericameria parryi (Gray) Nesom
Ericameria parryi var. affinis (A. Nels.) Nesom & Baird
Ericameria parryi var. attenuata (M.E. Jones) Nesom & Baird
  
Ericameria parryi var. howardii (Parry ex Gray) Nesom & Baird
  
Ericameria pulchella ssp. baileyi (Woot. & Standl.) L.C. Anders.
  = Chrysothamnus pulchellus ssp. baileyi
Ericameria vaseyi (Gray) L.C. Anders.
  = Chrysothamnus vaseyi
Ericameria viscidiflora (Hook.) L.C. Anders.
  = Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus
Erigeron acris L.
Erigeron acris ssp. politus (Fries) Schinz & R. Keller
Erigeron bellidiastrum Nutt.
  western daisy fleabane
Erigeron caespitosus Nutt.
  tufted fleabane
Erigeron canus Gray
  hoary fleabane
Erigeron colomexicanus A. Nels.
  running fleabane
Erigeron compositus Pursh
  cutleaf daisy
Erigeron concinnus (Hook. & Arn.) Torr. & Gray
  Navajo fleabane
Erigeron concinnus var. concinnus (Hook. & Arn.) Torr. & Gray
  Navajo fleabane
Erigeron consimilis Cronq.
  foothill fleabane
Erigeron coulteri Porter
  large mountain fleabane
Erigeron divergens Torr. & Gray
  spreading fleabane
Erigeron eatonii Gray
  Eaton's fleabane
Erigeron eatonii var. eatonii Gray
  Eaton's fleabane
Erigeron elatior (Gray) Greene
  tall fleabane
Erigeron engelmannii A. Nels.
  Engelmann's fleabane
Erigeron eximius Greene
  sprucefir fleabane
Erigeron flagellaris Gray
  trailing fleabane
Erigeron formosissimus Greene
  beautiful fleabane
Erigeron formosissimus var. formosissimus Greene
  beautiful fleabane
Erigeron formosissimus var. viscidus (Rydb.) Cronq.
  beautiful fleabane
Erigeron glabellus Nutt.
  streamside fleabane
Erigeron grandiflorus Hook.
  largeflower fleabane
Erigeron humilis Graham
  arctic alpine fleabane
Erigeron kachinensis Welsh & Moore
  kachina fleabane
Erigeron lanatus Hook.
  woolly fleabane
Erigeron leiomerus Gray
  rockslide yellow fleabane
Erigeron lonchophyllus Hook.
Erigeron melanocephalus (A. Nels.) A. Nels.
  blackhead fleabane
Erigeron nematophyllus Rydb.
  needleleaf fleabane
Erigeron peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron philadelphicus L.
  Philadelphia fleabane
Erigeron pinnatisectus (Gray) A. Nels.
  featherleaf fleabane
Erigeron pulcherrimus Heller
  basin fleabane
Erigeron pumilus Nutt.
  shaggy fleabane
Erigeron pumilus ssp. pumilus Nutt.
  shaggy fleabane
Erigeron simplex Greene
  onestem fleabane
Erigeron speciosus (Lindl.) DC.
  aspen fleabane
Erigeron speciosus var. macranthus (Nutt.) Cronq.
  aspen fleabane
Erigeron speciosus var. speciosus (Lindl.) DC.
  aspen fleabane
Erigeron strigosus Muhl. ex Willd.
  prairie fleabane
Erigeron subtrinervis Rydb. ex Porter & Britt.
  threenerve fleabane
Erigeron uintahensis Cronq.
  Uinta fleabane
Erigeron ursinus D.C. Eat.
  Bear River fleabane
Erigeron utahensis Gray
  Utah fleabane
Erigeron utahensis var. sparsifolius (Eastw.) Cronq.
  Utah fleabane
Erigeron utahensis var. utahensis Gray
  Utah fleabane
Erigeron vagus Payson
  rambling fleabane
Erigeron vetensis Rydb.
  early bluetop fleabane
Erigeron vreelandii Greene
  Vreeland's erigeron
Erigeron wilkenii O'Kane
  Dieter's erigeron
Eucephalus engelmannii (D.C. Eat.) Greene
Eupatorium herbaceum (Gray) Greene
  = Ageratina herbacea
Eupatorium maculatum L.
  spotted joepyeweed
Euthamia graminifolia (L.) Nutt.
  flattop goldentop
Euthamia gymnospermoides Greene
  Texas goldentop
Euthamia occidentalis Nutt.
  western goldentop
Evax prolifera Nutt. ex DC.
  bighead pygmycudweed
Flaveria campestris J.R. Johnston
  alkali yellowtops
Franseria 
  = Ambrosia 
Gaillardia aristata Pursh
  common gaillardia
Gaillardia pinnatifida Torr.
  red dome blanketflower
Gaillardia pulchella Foug.
  firewheel
Gaillardia spathulata Gray
  western blanketflower
Galinsoga parviflora Cav.
  gallantsoldier
Galinsoga quadriradiata Ruiz & Pavon
  shaggysoldier
Gnaphalium margaritaceum L.
  = Anaphalis margaritacea
Gnaphalium palustre Nutt.
  western marsh cudweed
Gnaphalium uliginosum L.
  marsh cudweed
Grindelia aphanactis Rydb.
  = Grindelia nuda var. aphanactis
Grindelia arizonica Gray
  Arizona gumweed
Grindelia arizonica var. stenophylla Steyermark
  Arizona gumweed
Grindelia decumbens Greene
  reclined gumweed
Grindelia decumbens var. decumbens Greene
  reclined gumweed
Grindelia decumbens var. subincisa (Greene) Steyermark
  reclined gumweed
Grindelia fastigiata Greene
  pointed gumweed
Grindelia inornata Greene
  Colorado gumweed
Grindelia nuda Wood
  curlytop gumweed
Grindelia nuda var. aphanactis (Rydb.) Nesom
  curlytop gumweed
Grindelia nuda var. nuda Wood
  curlytop gumweed
Grindelia papposa Nesom & Suh
Grindelia revoluta Steyermark
  rolled gumweed
Grindelia squarrosa (Pursh) Dunal
  curlycup gumweed
Grindelia squarrosa var. quasiperennis Lunell
  curlycup gumweed
Grindelia squarrosa var. serrulata (Rydb.) Steyermark
  curlycup gumweed
Grindelia subalpina Greene
  subalpine gumweed
Gutierrezia microcephala (DC.) Gray
  threadleaf snakeweed
Gutierrezia sarothrae (Pursh) Britt. & Rusby
  broom snakeweed
Haplopappus ciliatus (Nutt.) DC.
  = Grindelia papposa
Haplopappus coloradoensis (Gray) R.L. Hartman ex Dorn
  = Machaeranthera coloradoensis var. coloradoensis
Haplopappus coulteri Harvey & Gray ex Gray
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Haplopappus drummondii (Torr. & Gray) Blake
  = Isocoma drummondii
Haplopappus engelmannii (Gray) Hall
  = Oonopsis engelmannii
Haplopappus gracilis (Nutt.) Gray
  = Machaeranthera gracilis
Haplopappus heterophyllus (Gray) Blake
  = Isocoma pluriflora
Haplopappus lyallii Gray
  = Tonestus lyallii
Haplopappus macronema (Nutt.) Gray
  = Ericameria discoidea var. discoidea
Haplopappus parryi Gray
  = Solidago parryi
Haplopappus phyllocephalus DC.
  = Machaeranthera phyllocephala
Haplopappus pluriflorus (Torr. & Gray) Hall
  = Isocoma pluriflora
Haplopappus pygmaeus (Torr. & Gray) Gray
  = Tonestus pygmaeus
Haplopappus ravenii R.C. Jackson
  = Machaeranthera gracilis
Haplopappus spinulosus (Pursh) DC.
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Haplopappus texensis R.C. Jackson
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Helenium autumnale L.
  common sneezeweed
Helenium autumnale var. montanum (Nutt.) Fern.
  mountain sneezeweed
Helenium hoopesii Gray
  = Hymenoxys hoopesii
Helianthella microcephala (Gray) Gray
  purpledisk helianthella
Helianthella parryi Gray
  Parry's dwarfsunflower
Helianthella quinquenervis (Hook.) Gray
  fivenerve helianthella
Helianthella uniflora (Nutt.) Torr. & Gray
  oneflower helianthella
Helianthus annuus L.
  common sunflower
Helianthus ciliaris DC.
  Texas blueweed
Helianthus maximiliani Schrad.
  Maximilian sunflower
Helianthus nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus pauciflorus Nutt.
  stiff sunflower
Helianthus pauciflorus ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling
  stiff sunflower
Helianthus petiolaris Nutt.
  prairie sunflower
Helianthus pumilus Nutt.
  little sunflower
Helianthus tuberosus L.
  Jerusalem artichoke
Heliomeris multiflora Nutt.
  showy goldeneye
Heliopsis helianthoides (L.) Sweet
  sunflower heliopsis
Heliopsis helianthoides var. scabra (Dunal) Fern.
  smooth oxeye
Herrickia horrida Woot. & Standl.
  horrid herrickia
Heterotheca canescens (DC.) Shinners
  hoary falsegoldenaster
Heterotheca fulcrata (Greene) Shinners
  rockyscree falsegoldenaster
Heterotheca pumila (Greene) Semple
  alpine falsegoldenaster
Heterotheca villosa (Pursh) Shinners
  hairy goldenaster
Heterotheca villosa var. hispida (Hook.) Harms
  bristly hairy goldaster
Heterotheca villosa var. villosa (Pursh) Shinners
  hairy goldenaster
Hieracium albiflorum Hook.
  white hawkweed
Hieracium aurantiacum L.
  orange hawkweed
Hieracium fendleri Schultz-Bip.
  yellow hawkweed
Hieracium fendleri var. fendleri Schultz-Bip.
  Fendler's hawkweed
Hieracium gracile Hook.
  slender hawkweed
Hieracium gracile var. gracile Hook.
  slender hawkweed
Hymenopappus filifolius Hook.
  fineleaf hymenopappus
Hymenopappus filifolius var. cinereus (Rydb.) I.M. Johnston
  fineleaf hymenopappus
Hymenopappus filifolius var. luteus (Nutt.) B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. megacephalus B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. parvulus (Greene) B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. polycephalus (Osterhout) B.L. Turner
  manyhead hymenopappus
Hymenopappus flavescens Gray
  collegeflower
Hymenopappus newberryi (Gray) I.M. Johnston
  Newberry's hymenopappus
Hymenopappus tenuifolius Pursh
  Chalk Hill hymenopappus
Hymenoxys helenioides (Rydb.) Cockerell
  Intermountain hymenoxys
Hymenoxys hoopesii (Gray) Bierner
Hymenoxys odorata DC.
  bitter rubberweed
Hymenoxys richardsonii (Hook.) Cockerell
  pingue hymenoxys
Hymenoxys richardsonii var. richardsonii (Hook.) Cockerell
  pingue hymenoxys
Hypochaeris radicata L.
  hairy catsear
Isocoma drummondii (Torr. & Gray) Greene
  Drummond's jimmyweed
Isocoma pluriflora (Torr. & Gray) Greene
  southern jimmyweed
Iva acerosa (Nutt.) R.C. Jackson
  copperweed
Iva axillaris Pursh
  povertyweed
Iva xanthifolia Nutt.
  giant sumpweed
Krigia biflora (Walt.) Blake
  twoflower dwarfdandelion
Lactuca biennis (Moench) Fern.
  tall blue lettuce
Lactuca canadensis L.
  Canada lettuce
Lactuca graminifolia Michx.
  grassleaf lettuce
Lactuca ludoviciana (Nutt.) Riddell
  biannual lettuce
Lactuca pulchella (Pursh) DC.
  = Lactuca tatarica var. pulchella
Lactuca scariola L.
  = Lactuca serriola
Lactuca serriola L.
  prickly lettuce
Lactuca tatarica (L.) C.A. Mey.
  blue lettuce
Lactuca tatarica var. pulchella (Pursh) Breitung
  blue lettuce
Laennecia coulteri (Gray) Nesom
  conyza
Laennecia schiedeana (Less.) Nesom
  pineland marshtail
Lapsana communis L.
  common nipplewort
Leucanthemum leucanthemum (L.) Rydb.
  = Leucanthemum vulgare
Leucanthemum vulgare Lam.
  oxeyedaisy
Liatris lancifolia (Greene) Kittell
  lanceleaf gayfeather
Liatris ligulistylis (A. Nels.) K. Schum.
  Rocky Mountain gayfeather
Liatris punctata Hook.
  dotted gayfeather
Liatris squarrosa (L.) Michx.
  scaly gayfeather
Liatris squarrosa var. glabrata (Rydb.) Gaiser
  scaly gayfeather
Lygodesmia arizonica S. Tomb
  Arizona skeletonplant
Lygodesmia doloresensis S. Tomb
  Dolores River skeletonplant
Lygodesmia grandiflora (Nutt.) Torr. & Gray
  largeflower skeletonplant
Lygodesmia juncea (Pursh) D. Don ex Hook.
  rush skeletonplant
Machaeranthera bigelovii (Gray) Greene
  Bigelow's tansyaster
Machaeranthera bigelovii var. bigelovii (Gray) Greene
  Bigelow's tansyaster
Machaeranthera canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens var. ambigua B.L. Turner
  hoary aster
Machaeranthera canescens ssp. canescens var. canescens (Pursh) Gray
  cutleaf goldenweed
Machaeranthera canescens ssp. glabra (Gray) B.L. Turner
  hoary tansyaster
Machaeranthera canescens ssp. glabra var. aristata (Eastw.) B.L. Turner
  hoary tansyaster
Machaeranthera coloradoensis (Gray) Osterhout
  Colorado aster
Machaeranthera coloradoensis var. brandegei (Rydb.) T.J. Wats. ex R.L. Hartman
  Brandegee's aster
Machaeranthera coloradoensis var. coloradoensis (Gray) Osterhout
  Colorado aster
Machaeranthera gracilis (Nutt.) Shinners
  slender goldenweed
Machaeranthera grindelioides (Nutt.) Shinners
  rayless aster
Machaeranthera parviflora Gray
  smallflower tansyaster
Machaeranthera phyllocephala (DC.) Shinners
  camphor daisy
Machaeranthera pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera pinnatifida ssp. gooddingii (A. Nels.) B.L. Turner & Hartman
  Goodding's aster
Machaeranthera pinnatifida ssp. gooddingii var. paradoxa B.L. Turner & Hartman
  Goodding's aster
Machaeranthera pinnatifida ssp. pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera pinnatifida ssp. pinnatifida var. glaberrima (Rydb.) B.L. Turner & Hartman
  lacy tansyaster
Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera tanacetifolia (Kunth) Nees
  tanseyleaf aster
Madia glomerata Hook.
  mountain tarweed
Malacothrix sonchoides (Nutt.) Torr. & Gray
  sowthistle desertdandelion
Malacothrix torreyi Gray
  Torrey's desertdandelion
Matricaria perforata Merat
  scentless mayweed
Melampodium leucanthum Torr. & Gray
  plains blackfoot
Microseris nutans (Hook.) Schultz-Bip.
  nodding microceris
Nothocalais cuspidata (Pursh) Greene
  sharppoint microseris
Oligoneuron album (Nutt.) Nesom
Onopordum acanthium L.
  Scotch cottonthistle
Onopordum tauricum Willd.
  taurus cottonthistle
Oonopsis engelmannii (Gray) Greene
  Engelmann's falsegoldenweed
Oonopsis foliosa (Gray) Greene
  leafy falsegoldenweed
Palafoxia rosea (Bush) Cory
  rosy palafox
Palafoxia rosea var. macrolepis (Rydb.) B.L. Turner & Morris
  rosy palafox
Palafoxia sphacelata (Nutt. ex Torr.) Cory
  othake
Parthenium alpinum (Nutt.) Torr. & Gray
  alpine feverfew
Parthenium ligulatum (M.E. Jones) Barneby
  Colorado feverfew
Parthenium tetraneuris Barneby
  Arkansas River feverfew
Pectis angustifolia Torr.
  narrowleaf pectis
Pericome caudata Gray
  mountain leaftail
Petasites sagittatus (Banks ex Pursh) Gray
  arrowleaf sweet coltsfoot
Petradoria pumila (Nutt.) Greene
  grassy rockgoldenrod
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britt.
  oppositeleaf bahia
Picradeniopsis woodhousei (Gray) Rydb.
  Woodhouse's bahia
Platyschkuhria integrifolia (Gray) Rydb.
  oblongleaf bahia
Platyschkuhria integrifolia var. oblongifolia (Gray) W. Ellison
  basindaisy
Prenanthella exigua (Gray) Rydb.
  brightwhite
Prenanthes racemosa Michx.
  purple rattlesnakeroot
Psilostrophe bakeri Greene
  Baker's paperflower
Pyrrocoma clementis Rydb.
  tranquil goldenweed
Pyrrocoma crocea (Gray) Greene
  curlyhead goldenweed
Pyrrocoma lanceolata (Hook.) Greene
  lanceleaf goldenweed
Pyrrocoma uniflora (Hook.) Greene
  plantain goldenweed
Ratibida columnifera (Nutt.) Woot. & Standl.
  upright prairie coneflower
Ratibida tagetes (James) Barnh.
  green prairie coneflower
Rudbeckia hirta L.
  blackeyed Susan
Rudbeckia laciniata L.
  cutleaf coneflower
Rudbeckia laciniata var. ampla (A. Nels.) Cronq.
  cutleaf coneflower
Rudbeckia montana Gray
Rudbeckia occidentalis var. montana (Gray) Perdue
  = Rudbeckia montana
Rudbeckia triloba L.
  browneyed Susan
Saussurea densa (Hook.) Rydb.
  clustered sawwort
Schkuhria multiflora Hook. & Arn.
  manyflower false threadleaf
Scorzonera laciniata L.
  cutleaf vipergrass
Senecio amplectens Gray
  showy alpine groundsel
Senecio amplectens var. amplectens Gray
  showy alpine groundsel
Senecio amplectens var. holmii (Greene) Harrington
  Holm's ragwort
Senecio atratus Greene
  tall blacktip ragwort
Senecio bigelovii Gray
  nodding ragwort
Senecio bigelovii var. hallii Gray
  Hall's ragwort
Senecio canus Hook.
  woolly groundsel
Senecio crassulus Gray
  thickleaf groundsel
Senecio crocatus Rydb.
  saffron ragwort
Senecio debilis Nutt.
  weak groundsel
Senecio dimorphophyllus Greene
  splitleaf groundsel
Senecio dimorphophyllus var. dimorphophyllus Greene
  splitleaf groundsel
Senecio dimorphophyllus var. intermedius T.M. Barkl.
  splitleaf groundsel
Senecio eremophilus Richards.
  desert groundsel
Senecio eremophilus var. kingii (Rydb.) Greenm.
  King's groundsel
Senecio fendleri Gray
  Fendler's ragwort
Senecio flaccidus Less.
  threadleaf ragwort
Senecio flaccidus var. douglasii (DC.) B.L. Turner & T.M. Barkl.
  Douglas' groundsel
Senecio fremontii Torr. & Gray
  Fremont's groundsel
Senecio fremontii var. blitoides (Greene) Cronq.
  dwarf mountain ragwort
Senecio hydrophilus Nutt.
  water groundsel
Senecio integerrimus Nutt.
  lambstongue groundsel
Senecio multilobatus Torr. & Gray ex Gray
  lobeleaf groundsel
Senecio neomexicanus Gray
  New Mexico groundsel
Senecio neomexicanus var. neomexicanus Gray
  New Mexico groundsel
Senecio pauciflorus Pursh
  alpine groundsel
Senecio pauperculus Michx.
  balsam groundsel
Senecio plattensis Nutt.
  prairie groundsel
Senecio porteri Greene
  Porter's groundsel
Senecio pseudaureus Rydb.
  falsegold groundsel
Senecio pseudaureus var. flavulus (Greene) Greenm.
  falsegold groundsel
Senecio pseudaureus var. pseudaureus Rydb.
  falsegold groundsel
Senecio pudicus Greene
  bashful ragwort
Senecio rapifolius Nutt.
  openwoods groundsel
Senecio riddellii Torr. & Gray
  Riddell's ragwort
Senecio serra Hook.
  butterweed groundsel
Senecio serra var. admirabilis (Greene) A. Nels.
  tall ragwort
Senecio serra var. serra Hook.
  tall ragwort
Senecio soldanella Gray
  Colorado ragwort
Senecio spartioides Torr. & Gray
  broom groundsel
Senecio spartioides var. multicapitatus (Greenm. ex Rydb.) Welsh
Senecio streptanthifolius Greene
  cleftleaf groundsel
Senecio streptanthifolius var. oodes (Rydb.) J.F. Bain
  Rocky Mountain groundsel
Senecio streptanthifolius var. streptanthifolius Greene
  cleftleaf groundsel
Senecio taraxacoides (Gray) Greene
  dandelion ragwort
Senecio triangularis Hook.
  arrowleaf groundsel
Senecio tridenticulatus Rydb.
  threetooth ragwort
Senecio vulgaris L.
  common groundsel
Senecio werneriifolius (Gray) Gray
  hoary groundsel
Senecio wootonii Greene
  Wooton's ragwort
Shinnersoseris rostrata (Gray) S. Tomb
  beaked skeletonweed
Silphium integrifolium Michx.
  wholeleaf rosinweed
Silphium laciniatum L.
  compassplant
Solidago canadensis L.
  Canada goldenrod
Solidago gigantea Ait.
  giant goldenrod
Solidago missouriensis Nutt.
  Missouri goldenrod
Solidago mollis Bartl.
  velvety goldenrod
Solidago multiradiata Ait.
  mountain goldenrod
Solidago multiradiata var. scopulorum Gray
  manyray goldenrod
Solidago nana Nutt.
  baby goldenrod
Solidago nemoralis Ait.
  Dyersweed goldenrod
Solidago nemoralis var. longipetiolata (Mackenzie & Bush) Palmer & Steyermark
  gray goldenrod
Solidago parryi (Gray) Greene
  Parry's goldenrod
Solidago rigida ssp. rigida L.
  stiff goldenrod
Solidago simplex Kunth
  Mt. Albert goldenrod
Solidago simplex ssp. simplex Kunth
  Mt. Albert goldenrod
Solidago simplex ssp. simplex var. nana (Gray) Ringius
  dwarf goldenrod
Solidago simplex ssp. simplex var. simplex Kunth
  Mt. Albert goldenrod
Solidago speciosa Nutt.
  showy goldenrod
Solidago speciosa var. pallida Porter
  showy goldenrod
Solidago velutina DC.
  threenerve goldenrod
Solidago wrightii Gray
  Wright's goldenrod
Solidago wrightii var. adenophora Blake
  Wright's goldenrod
Sonchus arvensis L.
  field sowthistle
Sonchus arvensis ssp. uliginosus (Bieb.) Nyman
  moist sowthistle
Sonchus asper (L.) Hill
  spiny sowthistle
Sonchus oleraceus L.
  common sowthistle
Sphaeromeria argentea Nutt.
  silver chickensage
Sphaeromeria capitata Nutt.
  rock tansy
Stenotus acaulis (Nutt.) Nutt.
  stemless mock goldenweed
Stenotus armerioides Nutt.
  thrift mock goldenweed
Stephanomeria exigua Nutt.
  small wirelettuce
Stephanomeria pauciflora (Torr.) A. Nels.
  brownplume wirelettuce
Stephanomeria runcinata Nutt.
  desert wirelettuce
Stephanomeria wrightii Gray
  Wright's wirelettuce
Tanacetum parthenium (L.) Schultz-Bip.
  feverfew
Tanacetum vulgare L.
  common tansy
Taraxacum eriophorum Rydb.
  woolbearing dandelion
Taraxacum lyratum (Ledeb.) DC.
  harp dandelion
Taraxacum officinale G.H. Weber ex Wiggers
  common dandelion
Taraxacum officinale ssp. ceratophorum (Ledeb.) Schinz ex Thellung
  fleshy dandelion
Tetradymia canescens DC.
  spineless horsebrush
Tetradymia nuttallii Torr. & Gray
  Nuttall's horsebrush
Tetradymia spinosa Hook. & Arn.
  shortspine horsebrush
Tetraneuris acaulis (Pursh) Greene
  stemless hymenoxys
Tetraneuris acaulis var. caespitosa A. Nels.
  caespitose hymenoxys
Tetraneuris brandegei (Porter ex Gray) Parker
  Brandegee's hymenoxys
Tetraneuris grandiflora (Torr. & Gray ex Gray) Parker
  graylocks hymenoxys
Tetraneuris ivesiana Greene
  Ives' fournerved daisy
Tetraneuris scaposa (DC.) Greene
  stemmy hymenoxys
Tetraneuris torreyana (Nutt.) Greene
  Torrey's hymenoxys
Thelesperma filifolium (Hook.) Gray
  stiff greenthread
Thelesperma filifolium var. intermedium (Rydb.) Shinners
  stiff greenthread
Thelesperma gracile (Torr.) Gray
  = Thelesperma megapotamicum
Thelesperma megapotamicum (Spreng.) Kuntze
  Hopi tea greenthread
Thelesperma subnudum Gray
  sand fringedpod
Thymophylla aurea (Gray) Greene ex Britt.
  manyawn pricklyleaf
Thymophylla aurea var. aurea (Gray) Greene ex Britt.
  manyawn pricklyleaf
Tonestus lyallii (Gray) A. Nels.
  Lyall's goldenweed
Tonestus pygmaeus (Torr. & Gray) A. Nels.
  pygmy goldenweed
Townsendia alpigena Piper
  Wyoming townsendia
Townsendia alpigena var. alpigena Piper
  mountain townsendia
Townsendia annua Beaman
  annual townsend daisy
Townsendia eximia Gray
  tall townsendia
Townsendia exscapa (Richards.) Porter
  stemless townsendia
Townsendia fendleri Gray
  Fendler's townsend daisy
Townsendia glabella Gray
  Gray's townsend daisy
Townsendia grandiflora Nutt.
  largeflower townsend daisy
Townsendia hookeri Beaman
  Hooker's townsendia
Townsendia incana Nutt.
  hoary townsendia
Townsendia leptotes (Gray) Osterhout
  common townsendia
Townsendia rothrockii Gray ex Rothrock
  Rothrock's townsendia
Townsendia strigosa Nutt.
  hairy townsendia
Tragopogon dubius Scop.
  yellow salsify
Tragopogon porrifolius L.
  salsify
Tragopogon pratensis L.
  meadow salsify
Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray
  golden crownbeard
Verbesina encelioides ssp. encelioides (Cav.) Benth. & Hook. f. ex Gray
  golden crownbeard
Vernonia baldwinii Torr.
  Balwin's ironweed
Vernonia baldwinii ssp. interior (Small) Faust
  interior ironweed
Vernonia fasciculata Michx.
  prairie ironweed
Vernonia fasciculata ssp. corymbosa (Schwein. ex Keating) S.B. Jones
  prairie ironweed
Vernonia marginata (Torr.) Raf.
  plains ironweed
Wyethia X magna A. Nels. (pro sp.)
  wyethia
Wyethia amplexicaulis (Nutt.) Nutt.
  mulesears wyethia
Wyethia arizonica Gray
  Arizona mulesears
Wyethia scabra Hook.
  badlands wyethia
Wyethia scabra var. canescens W.A. Weber
  badlands mulesears
Wyethia scabra var. scabra Hook.
  badlands mulesears
Xanthium spinosum L.
  spiny cockleburr
Xanthium strumarium L.
  rough cockleburr
Xanthocephalum sarothrae (Pursh) Shinners
  = Gutierrezia sarothrae
Xylorhiza glabriuscula Nutt.
  smooth woodyaster
Xylorhiza venusta (M.E. Jones) Heller
  charming woodyaster
  zinnia
Zinnia grandiflora Nutt.
  Rocky Mountain zinnia

CONVOLVULACEAE
Calystegia macounii (Greene) Brummitt
  Macoun's false bindweed
Calystegia sepium (L.) R. Br.
  hedge false bindweed
Calystegia sepium ssp. angulata Brummitt
  hedge false bindweed
Convolvulus arvensis L.
  field bindweed
Convolvulus equitans Benth.
  Texas bindweed
Cuscuta approximata Bab.
  alfalfa dodder
Cuscuta approximata var. approximata Bab.
  alfalfa dodder
Cuscuta cuspidata Engelm.
  cusp dodder
Cuscuta denticulata Engelm.
  desert dodder
Cuscuta denticulata var. denticulata Engelm.
  smalltooth dodder
Cuscuta gronovii Willd. ex J.A. Schultes
  scaldweed
Cuscuta gronovii var. gronovii Willd. ex J.A. Schultes
  love dodder
Cuscuta indecora Choisy
  bigseed alfalfa dodder
Cuscuta indecora var. neuropetala (Engelm.) A.S. Hitchc.
  bigseed dodder
Cuscuta pentagona Engelm.
  fiveangled dodder
Cuscuta pentagona var. pentagona Engelm.
  fiveangled dodder
Cuscuta umbellata Kunth
  flatglobe dodder
Evolvulus nuttallianus J.A. Schultes
  shaggy dwarf morningglory
Ipomoea leptophylla Torr.
  bush morningglory

CORNACEAE
Cornus sericea L.
  redosier dogwood

CRASSULACEAE
Crassula aquatica (L.) Schoenl.
  water pygmyweed
Rhodiola integrifolia Raf.
  = Sedum integrifolium ssp. integrifolium
Sedum acre L.
  goldmoss stonecrop
Sedum integrifolium (Raf.) A. Nels.
  ledge stonecrop
Sedum integrifolium ssp. integrifolium (Raf.) A. Nels.
  entireleaf stonecrop
Sedum lanceolatum Torr.
  spearleaf stonecrop
Sedum lanceolatum ssp. lanceolatum Torr.
  spearleaf stonecrop
Sedum rhodanthum Gray
  redpod stonecrop
Sedum spurium Bieb.
  tworow stonecrop

CROSSOSOMATACEAE
Glossopetalon planitierum (Ensign) St. John
  plains greasebush
Glossopetalon spinescens Gray
  spiny greasebush
Glossopetalon spinescens var. meionandrum (Koehne) Trel.
  spiny greasebush

CRUCIFERAE
Alliaria petiolata (Bieb.) Cavara & Grande
  garlic mustard
Alyssum alyssoides (L.) L.
  pale madwort
Alyssum desertorum Stapf
  desert madwort
Alyssum minus (L.) Rothm.
Alyssum minus var. micranthum (C.A. Mey.) Dudley
Alyssum murale Waldst. & Kit.
  yellowtuft
Arabidopsis salsuginea (Pallas) N. Busch
  saltwater cress
Arabis X divaricarpa A. Nels. (pro sp.)
  spreadingpod rockcress
Arabis crandallii B.L. Robins.
  Crandall's rockcress
Arabis drummondii Gray
  Drummond's rockcress
Arabis fendleri (S. Wats.) Greene
  Fendler's rockcress
Arabis fendleri var. fendleri (S. Wats.) Greene
  Fendler's rockcress
Arabis fendleri var. spatifolia (Rydb.) Rollins
  spoonleaf rockcress
Arabis fernaldiana Rollins
  park rockcress
Arabis fernaldiana var. fernaldiana Rollins
  park rockcress
Arabis glabra (L.) Bernh.
  tower rockcress
Arabis glabra var. glabra (L.) Bernh.
  tower rockcress
Arabis gunnisoniana Rollins
  Gunnison's rockcress
Arabis hirsuta (L.) Scop.
  hairy rockcress
Arabis hirsuta var. pycnocarpa (M. Hopkins) Rollins
  creamflower rockcress
Arabis holboellii Hornem.
  Holboell's rockcress
Arabis holboellii var. retrofracta (Graham) Rydb.
  second rockcress
Arabis lemmonii S. Wats.
  Lemmon's rockcress
Arabis lemmonii var. lemmonii S. Wats.
  Lemmon's rockcress
Arabis lignifera A. Nels.
  desert rockcress
Arabis oxylobula Greene
  Glenwood Springs rockcress
Arabis perennans S. Wats.
  perennial rockcress
Arabis pulchra M.E. Jones ex S. Wats.
  beauty rockcress
Arabis pulchra var. pallens M.E. Jones
  desert rockcress
Arabis selbyi Rydb.
  Selby's rockcress
Armoracia armoracia (L.) Britt.
  = Armoracia rusticana
Armoracia rusticana P.G. Gaertn., B. Mey. & Scherb.
  horseradish
Barbarea orthoceras Ledeb.
  American yellowrocket
Barbarea vulgaris Ait. f.
  garden yellowrocket
Berteroa incana (L.) DC.
  hoary false madwort
Brassica alba Rabenh., non L.
  = Sinapis alba
Brassica arvensis (L.) Rabenh.
  = Sinapis arvensis
Brassica juncea (L.) Czern.
  India mustard
Brassica nigra (L.) W.D.J. Koch
  black mustard
Brassica rapa L.
  rape mustard
Braya glabella Richards.
  Bartlett braya
Braya humilis (C.A. Mey.) B.L. Robins.
  low braya
Camelina microcarpa DC.
  littlepod falseflax
Camelina rumelica Velen.
  graceful falseflax
Capsella bursa-pastoris (L.) Medik.
  shepherd's purse
Cardamine breweri S. Wats.
  Brewer's bittercress
Cardamine cordifolia Gray
  heartleaf bittercress
Cardamine pensylvanica Muhl. ex Willd.
  Pennsylvania bittercress
Cardaria chalapensis (L.) Hand.-Maz.
Cardaria draba (L.) Desv.
  pepperweed whitetop
Cardaria pubescens (C.A. Mey.) Jarmolenko
  hairy whitetop
Caulanthus crassicaulis (Torr.) S. Wats.
  thickstem wild cabbage
Chorispora tenella (Pallas) DC.
  crossflower
Cochlearia armoracia L.
  = Armoracia rusticana
Conringia orientalis (L.) Dumort.
  hare's ear mustard
Descurainia californica (Gray) O.E. Schulz
  Sierran tansymustard
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn
  mountain tansymustard
Descurainia pinnata (Walt.) Britt.
  western tansymustard
Descurainia ramosissima Rollins
  Villa Grove tansymustard
Descurainia sophia (L.) Webb ex Prantl
  herb sophia
Dimorphocarpa wislizeni (Engelm.) Rollins
  touristplant
Draba albertina Greene
  slender whitlowgrass
Draba aurea Vahl ex Hornem.
  golden whitlowgrass
Draba borealis DC.
  boreal whitlowgrass
Draba breweri S. Wats.
  cushion whitlowgrass
Draba breweri var. cana (Rydb.) Rollins
Draba crassa Rydb.
  thickleaf whitlowgrass
Draba crassifolia Graham
  snowbed whitlowgrass
Draba cuneifolia Nutt. ex Torr. & Gray
  wedgeleaf whitlowgrass
Draba exunguiculata (O.E. Schulz) C.L. Hitchc.
  Garys Peak whitlowgrass
Draba fladnizensis Wulfen
  Austrian whitlowgrass
Draba globosa Payson
  beavertip whitlowgrass
Draba graminea Greene
  Rocky Mountain whitlowgrass
Draba grayana (Rydb.) C.L. Hitchc.
  Gray's whitlowgrass
Draba helleriana Greene
  Heller's whitlowgrass
Draba incerta Payson
  Yellowstone whitlowgrass
Draba lonchocarpa Rydb.
  lancepod whitlowgrass
Draba nemorosa L.
  woodland whitlowgrass
Draba oligosperma Hook.
  fewseed whitlowgrass
Draba porsildii Mulligan
  Porsild's whitlowgrass
Draba rectifructa C.L. Hitchc.
  mountain whitlowgrass
Draba reptans (Lam.) Fern.
  Carolina whitlowgrass
Draba smithii Gilg ex O.E. Schulz
  Smith's whitlowgrass
Draba spectabilis Greene
  showy whitlowgrass
Draba streptobrachia Price
  alpine tundra whitlowgrass
Draba streptocarpa Gray
  pretty whitlowgrass
Draba ventosa Gray
  Wind River whitlowgrass
Draba weberi Price & Rollins
  Weber's draba
Erysimum capitatum (Dougl. ex Hook.) Greene
  sanddune wallflower
Erysimum capitatum var. capitatum (Dougl. ex Hook.) Greene
  sanddune wallflower
Erysimum cheiranthoides L.
  wormseed wallflower
Erysimum inconspicuum (S. Wats.) MacM.
  shy wallflower
Erysimum officinale L.
  = Sisymbrium officinale
Erysimum repandum L.
  spreading wallflower
Erysimum wheeleri Rothrock
  = Erysimum capitatum var. capitatum
Euclidium syriacum (L.) Ait. f.
  Syrian mustard
Eutrema penlandii Rollins
  Penland's eutrema
Halimolobos virgata (Nutt.) O.E. Schulz
  rod halimolobos
Hesperis matronalis L.
  dames rocket
Hutchinsia procumbens (L.) Desv.
  prostrate hutchinsia
Iberis amara L.
  annual candytuft
Isatis tinctoria L.
  Dyer's woad
Lepidium alyssoides Gray
  mesa pepperwort
Lepidium bourgeauanum Thellung
  Bourgeau's pepperweed
Lepidium campestre (L.) Ait. f.
  field pepperweed
Lepidium densiflorum Schrad.
  common pepperweed
Lepidium integrifolium Nutt.
  thickleaf pepperweed
Lepidium integrifolium var. heterophyllum S. Wats.
  thickleaf pepperweed
Lepidium lasiocarpum Nutt.
  shaggyfruit pepperweed
Lepidium latifolium L.
  broadleaved pepperweed
Lepidium montanum Nutt.
  mountain pepperweed
Lepidium montanum var. tenellum (L.O. Williams) C.L. Hitchc.
  mountain pepperweed
Lepidium perfoliatum L.
  clasping pepperweed
Lepidium ramosissimum A. Nels.
  manybranched pepperweed
Lepidium strictum (S. Wats.) Rattan
  upright pepperweed
Lepidium virginicum L.
  Virginia pepperweed
Lesquerella alpina (Nutt.) S. Wats.
  alpine bladderpod
Lesquerella arenosa (Richards.) Rydb.
  Great Plains bladderpod
Lesquerella arenosa var. argillosa Rollins & Shaw
  Great Plains bladderpod
Lesquerella calcicola Rollins
  Rocky Mountain bladderpod
Lesquerella congesta Rollins
  Dudley Bluffs bladderpod
Lesquerella fendleri (Gray) S. Wats.
  Fendler's bladderpod
Lesquerella ludoviciana (Nutt.) S. Wats.
  foothill bladderpod
Lesquerella montana (Gray) S. Wats.
  mountain bladderpod
Lesquerella ovalifolia Rydb. ex Britt.
  roundleaf bladderpod
Lesquerella parviflora Rollins
  Piceance bladderpod
Lesquerella parvula Greene
  pygmy bladderpod
Lesquerella pruinosa Greene
  Pagosa Springs bladderpod
Lesquerella rectipes Woot. & Standl.
  straight bladderpod
Lobularia maritima (L.) Desv.
  seaside lobularia
Malcolmia africana (L.) Ait. f.
  African mustard
Nasturtium nasturtium-aquaticum (L.) Karsten
  = Rorippa nasturtium-aquaticum
Pennellia micrantha (Gray) Nieuwl.
  mountain mock thelypody
Physaria acutifolia Rydb.
  sharpleaf twinpod
Physaria alpina Rollins
  Avery Peak twinpod
Physaria bellii Mulligan
  Front Range twinpod
Physaria floribunda Rydb.
  pointtip twinpod
Physaria floribunda var. osterhoutii (Payson) Rollins
Physaria obcordata Rollins
  Dudley Bluffs twinpod
Physaria rollinsii Mulligan
  Rollins' twinpod
Physaria vitulifera Rydb.
  roundtip twinpod
Raphanus raphanistrum L.
  wild radish
Raphanus sativus L.
  wild radish
Rorippa alpina (S. Wats.) Rydb.
  alpine yellowcress
Rorippa armoracia (L.) A.S. Hitchc.
  = Armoracia rusticana
Rorippa coloradensis R. Stuckey
  San Luis yellowcress
Rorippa curvipes Greene
  bluntleaf yellowcress
Rorippa curvipes var. curvipes Greene
  bluntleaf yellowcress
Rorippa nasturtium-aquaticum (L.) Hayek
  watercress
Rorippa palustris (L.) Bess.
  bog yellowcress
Rorippa palustris ssp. fernaldiana (Butters & Abbe) Jonsell
  Fernald's yellowcress
Rorippa palustris ssp. hispida (Desv.) Jonsell
  hispid yellowcress
Rorippa sinuata (Nutt.) A.S. Hitchc.
  spreading yellowcress
Rorippa sphaerocarpa (Gray) Britt.
  roundfruit yellowcress
Rorippa sylvestris (L.) Bess.
  creeping yellowcress
Rorippa tenerrima Greene
  Modoc yellowcress
Rorippa teres (Michx.) R. Stuckey
  southern marsh yellowcress
Schoenocrambe linearifolia (Gray) Rollins
  slimleaf plainsmustard
Schoenocrambe linifolia (Nutt.) Greene
  flaxleaf plainsmustard
Sinapis alba L.
  white mustard
Sinapis arvensis L.
  charlock mustard
Sinapis nigra L.
  = Brassica nigra
Sisymbrium altissimum L.
  tall tumblemustard
Sisymbrium austriacum Jacq.
  jeweled rocket
Sisymbrium loeselii L.
  small tumbleweed mustard
Sisymbrium officinale (L.) Scop.
  hedgemustard
Smelowskia calycina (Steph. ex Willd.) C.A. Mey.
  alpine smelowskia
Stanleya albescens M.E. Jones
  white princesplume
Stanleya pinnata (Pursh) Britt.
  desert princesplume
Stanleya pinnata var. integrifolia (James ex Torr.) Rollins
  golden princesplume
Stanleya pinnata var. pinnata (Pursh) Britt.
  pinnate princesplume
Stanleya viridiflora Nutt.
  green princesplume
Streptanthella longirostris (S. Wats.) Rydb.
  longbeak streptanthella
Streptanthus cordatus Nutt.
  heartleaf twistflower
Thelypodiopsis aurea (Eastw.) Rydb.
  Durango tumblemustard
Thelypodiopsis elegans (M.E. Jones) Rydb.
  Westwater tumblemustard
Thelypodiopsis juniperorum (Payson) Rydb.
  juniper tumblemustard
Thelypodium integrifolium (Nutt.) Endl. ex Walp.
  entireleaved thelypody
Thelypodium laxiflorum Al-Shehbaz
  droopflower thelypody
Thelypodium paniculatum A. Nels.
  northwestern thelypody
Thelypodium sagittatum (Nutt. ex Torr. & Gray) Endl. ex Walp.
  arrow thelypody
Thelypodium sagittatum ssp. sagittatum (Nutt. ex Torr. & Gray) Endl. ex Walp.
  arrow thelypody
Thelypodium wrightii Gray
  Wright's thelypody
Thelypodium wrightii ssp. oklahomense Al-Shehbaz
  Oklahoma thelypody
Thlaspi arvense L.
  field pennycress
Thlaspi montanum L.
  alpine pennycress
Thlaspi montanum var. montanum L.
  alpine pennycress

CUCURBITACEAE
Cucurbita foetidissima Kunth
  buffalo gourd
Cyclanthera dissecta (Torr. & Gray) Arn.
  cutleaf cyclanthera
Echinocystis lobata (Michx.) Torr. & Gray
  wild cucumber

CUPRESSACEAE
Juniperus communis L.
  common juniper
Juniperus communis var. montana Ait.
  common juniper
Juniperus monosperma (Engelm.) Sarg.
  oneseed juniper
Juniperus osteosperma (Torr.) Little
  Utah juniper
Juniperus scopulorum Sarg.
  Rocky Mountain juniper

DENNSTAEDTIACEAE
Pteridium aquilinum (L.) Kuhn
  western brackenfern
Pteridium aquilinum var. pubescens Underwood
  hairy brackenfern

DIPSACACEAE
Dipsacus fullonum L.
  Fuller's teasel
Dipsacus laciniatus L.
  cutleaf teasel
Knautia arvensis (L.) Coult.
  field scabiosa

DROSERACEAE
Drosera rotundifolia L.
  roundleaf sundew

DRYOPTERIDACEAE
Athyrium americanum (Butters) Maxon
  alpine ladyfern
Athyrium filix-femina (L.) Roth
  common ladyfern
Athyrium filix-femina ssp. angustum (Willd.) Clausen
  subarctic ladyfern
Athyrium filix-femina ssp. cyclosorum (Rupr.) C. Christens.
  subarctic ladyfern
Cystopteris fragilis (L.) Bernh.
  brittle bladderfern
Cystopteris montana (Lam.) Bernh. ex Desv.
  mountain bladderfern
Cystopteris reevesiana Lellinger
  Reeves' bladderfern
Cystopteris tenuis (Michx.) Desv.
  upland brittle bladderfern
Cystopteris utahensis Windham & Haufler
  Utah bladderfern
Dryopteris expansa (K. Presl) Fraser-Jenkins & Jermy
  spreading woodfern
Dryopteris filix-mas (L.) Schott
  male fern
Gymnocarpium disjunctum (Rupr.) Ching
  Pacific oakfern
Onoclea sensibilis L.
  sensitive fern
Polystichum lonchitis (L.) Roth
  northern hollyfern
Polystichum scopulinum (D.C. Eat.) Maxon
  mountain hollyfern
Woodsia oregana D.C. Eat.
  Oregon woodsia
Woodsia plummerae Lemmon
  Plummer's cliff fern
Woodsia scopulina D.C. Eat.
  Rocky Mountain woodsia

ELAEAGNACEAE
Elaeagnus angustifolia L.
  Russian olive
Elaeagnus commutata Bernh. ex Rydb.
  silverberry
Shepherdia argentea (Pursh) Nutt.
  silver buffaloberry
Shepherdia canadensis (L.) Nutt.
  russet buffaloberry

ELATINACEAE
Bergia texana (Hook.) Seub. ex Walp.
  Texas bergia
Elatine rubella Rydb.
  southwestern waterwort

EPHEDRACEAE
Ephedra cutleri Peebles
Ephedra torreyana S. Wats.
  Torrey's jointfir
Ephedra viridis Coville
  mormon tea
Ephedra viridis var. viridis Coville
  mormon tea

EQUISETACEAE
Equisetum affine Engelm.
  = Equisetum hyemale var. affine
Equisetum arvense L.
  field horsetail
Equisetum hyemale L.
  scouringrush horsetail
Equisetum laevigatum A. Braun
  smooth horsetail
Equisetum pratense Ehrh.
  meadow horsetail
Equisetum variegatum Schleich. ex F. Weber & D.M.H. Mohr
  variegated scouringrush
Equisetum variegatum var. variegatum Schleich. ex F. Weber & D.M.H. Mohr
  variegated scouringrush

ERICACEAE
Arctostaphylos uva-ursi (L.) Spreng.
  kinnikinnick
Chimaphila umbellata (L.) W. Bart.
  pipsissewa
Chimaphila umbellata ssp. occidentalis (Rydb.) Hulten
  pipsissewa
Gaultheria humifusa (Graham) Rydb.
  alpine spicywintergreen
Kalmia microphylla (Hook.) Heller
  alpine laurel
Kalmia polifolia ssp. microphylla (Hook.) Calder & Taylor
  = Kalmia microphylla
Moneses uniflora (L.) Gray
  single delight
Orthilia secunda (L.) House
  sidebells wintergreen
Pyrola asarifolia Michx.
  liverleaf wintergreen
Pyrola asarifolia ssp. asarifolia Michx.
  liverleaf wintergreen
Pyrola chlorantha Sw.
  greenflowered wintergreen
Pyrola minor L.
  snowline wintergreen
Pyrola picta Sm.
  whiteveined wintergreen
Rhododendron albiflorum Hook.
  Cascade azalea
Vaccinium cespitosum Michx.
  dwarf blueberry
Vaccinium myrtillus L.
  whortleberry
Vaccinium myrtillus var. oreophilum (Rydb.) Dorn
  whortleberry
Vaccinium scoparium Leib. ex Coville
  grouse whortleberry

EUPHORBIACEAE
Argythamnia humilis (Engelm. & Gray) Muell.-Arg.
  low silverbush
Argythamnia mercurialina (Nutt.) Muell.-Arg.
  tall silverbush
Chamaesyce fendleri (Torr. & Gray) Small
  Fendler's sandmat
Chamaesyce geyeri (Engelm.) Small
  Geyer's sandmat
Chamaesyce glyptosperma (Engelm.) Small
  ribseed sandmat
Chamaesyce lata (Engelm.) Small
  hoary sandmat
Chamaesyce missurica (Raf.) Shinners
  prairie sandmat
Chamaesyce parryi (Engelm.) Rydb.
  Parry's sandmat
Chamaesyce revoluta (Engelm.) Small
  threadstem sandmat
Chamaesyce serpens (Kunth) Small
  matted sandmat
Chamaesyce serpyllifolia (Pers.) Small
  thymeleaf sandmat
Chamaesyce stictospora (Engelm.) Small
  slimseed sandmat
Croton texensis (Klotzsch) Muell.-Arg.
  Texas croton
Euphorbia brachycera Engelm.
  horned spurge
Euphorbia crenulata Engelm.
  Chinese caps
Euphorbia cyparissias L.
  cypress spurge
Euphorbia dentata Michx.
  toothed spurge
Euphorbia esula var. esula L.
  wolf's milk
Euphorbia esula var. uralensis (Fisch. ex Link) Dorn
  wolf's milk
Euphorbia fendleri Torr. & Gray
  = Chamaesyce fendleri
Euphorbia glyptosperma Engelm.
  = Chamaesyce glyptosperma
Euphorbia hexagona Nutt. ex Spreng.
  sixangle spurge
Euphorbia incisa Engelm.
  Mojave spurge
Euphorbia marginata Pursh
  snow on the mountain
Euphorbia missurica Raf.
  = Chamaesyce missurica
Euphorbia myrsinites L.
  myrtle spurge
Euphorbia nuttallii (Engelm.) Small
  = Chamaesyce missurica
Euphorbia parryi Engelm.
  = Chamaesyce parryi
Euphorbia peplus L.
  petty spurge
Euphorbia petaloidea Engelm.
  = Chamaesyce missurica
Euphorbia revoluta Engelm.
  = Chamaesyce revoluta
Euphorbia serpens Kunth
  = Chamaesyce serpens
Euphorbia spathulata Lam.
  warty spurge
Euphorbia stictospora Engelm.
  = Chamaesyce stictospora
Stillingia sylvatica Garden ex L.
  queensdelight
  = Euphorbia spathulata
Tragia ramosa Torr.
  branched noseburn

FAGACEAE
Quercus gambelii Nutt.
  Gambel's oak
Quercus grisea Liebm.
  gray oak
Quercus havardii Rydb.
  Havard's oak
Quercus havardii var. tuckeri Welsh
  Tucker's oak
Quercus turbinella Greene
  shrub live oak
Quercus turbinella var. ajoensis (C.H. Muller) Little
  shrub live oak

FRANKENIACEAE
Frankenia jamesii Torr. ex Gray
  James' seaheath

FUMARIACEAE
Corydalis aurea Willd.
  scrambledeggs
Corydalis aurea ssp. aurea Willd.
  scrambledeggs
Corydalis caseana Gray
  Sierran fumewort
Corydalis caseana ssp. brandegei (S. Wats.) G.B. Ownbey
  Brandegee's fumewort
Dicentra uniflora Kellogg
  longhorn steershead
Fumaria vaillantii Loisel.
  earthsmoke

GENTIANACEAE
Centaurium calycosum (Buckl.) Fern.
  Arizona centaury
Centaurium exaltatum (Griseb.) W. Wight ex Piper
  desert centaury
Eustoma grandiflorum (Raf.) Shinners
  = Eustoma russellianum
Eustoma russellianum (Hook.) G. Don
  showy prairiegentian
Frasera albomarginata S. Wats.
  desert elkweed
Frasera coloradensis (Rogers) D.M. Post
  Colorado elkweed
Frasera paniculata Torr.
  tufted elkweed
Frasera speciosa Dougl. ex Griseb.
  showy frasera
Gentiana acuta Michx.
  = Gentianella amarella ssp. acuta
Gentiana affinis Griseb.
  pleated gentian
Gentiana algida Pallas
  whitish gentian
Gentiana amarella L. auct. p.p.
  = Gentianella amarella ssp. acuta
Gentiana andrewsii Griseb.
  closed bottle gentian
Gentiana andrewsii var. andrewsii Griseb.
  Andrews' gentian
Gentiana barbellata Engelm.
  = Gentianopsis barbellata
Gentiana elegans A. Nels.
  = Gentianopsis thermalis
Gentiana fremontii Torr.
  moss gentian
Gentiana heterosepala Engelm.
  = Gentianella amarella ssp. heterosepala
Gentiana nutans Bunge
  tundra gentian
Gentiana parryi Engelm.
  Parry's gentian
Gentiana prostrata Haenke
  pygmy gentian
Gentiana tenella Rottb.
  = Gentianella tenella ssp. tenella
Gentiana thermalis Kuntze
  = Gentianopsis thermalis
Gentianella amarella (L.) Boerner
  autumn dwarfgentian
Gentianella amarella ssp. acuta (Michx.) J. Gillett
  autumn dwarfgentian
Gentianella amarella ssp. heterosepala (Engelm.) J. Gillett
  autumn dwarfgentian
Gentianella tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianella tenella ssp. tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianella tortuosa (M.E. Jones) J. Gillett
  Cathedral Bluff dwarfgentian
Gentianopsis barbellata (Engelm.) Iltis
  perennial fringedgentian
Gentianopsis thermalis (Kuntze) Iltis
  Rocky Mountain fringedgentian
Lomatogonium rotatum (L.) Fries ex Fern.
  marsh felwort
Swertia perennis L.
  star gentian
Swertia radiata (Kellogg) Kuntze
  = Frasera speciosa

GERANIACEAE
Erodium cicutarium (L.) L'Her. ex Ait.
  redstem stork's bill
Geranium atropurpureum Heller
  western purple cranesbill
Geranium atropurpureum var. atropurpureum Heller
  western purple cranesbill
Geranium bicknellii Britt.
  Bicknell's cranesbill
Geranium bicknellii var. longipes (S. Wats.) Fern.
  northern cranesbill
Geranium caespitosum James
  pineywoods geranium
Geranium caespitosum var. caespitosum James
  pineywoods geranium
Geranium columbinum L.
  longstalk cranesbill
Geranium richardsonii Fisch. & Trautv.
  Richardson's geranium
Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey.
  sticky geranium
Geranium viscosissimum var. nervosum (Rydb.) C.L. Hitchc.
  sticky purple geranium

GROSSULARIACEAE
Ribes americanum P. Mill.
  American black currant
Ribes aureum Pursh
  golden currant
Ribes aureum var. villosum DC.
  golden currant
Ribes cereum Dougl.
  wax currant
Ribes coloradense Coville
  Colorado currant
Ribes divaricatum Dougl.
  spreading gooseberry
Ribes inerme Rydb.
  whitestem gooseberry
Ribes lacustre (Pers.) Poir.
  prickly currant
Ribes leptanthum Gray
  trumpet gooseberry
Ribes montigenum McClatchie
  gooseberry currant
Ribes viscosissimum Pursh
  sticky currant
Ribes wolfii Rothrock
  Wolf's currant

HALORAGACEAE
Myriophyllum verticillatum L.
  whorlleaf watermilfoil

HIPPURIDACEAE
Hippuris vulgaris L.
  common marestail

HYDRANGEACEAE
Fendlera rupicola Gray
  cliff fendlerbush
Fendlerella utahensis (S. Wats.) Heller
  Utah fendlerbush
Jamesia americana Torr. & Gray
  cliffbush
Philadelphus microphyllus Gray
  littleleaf mockorange

HYDROCHARITACEAE
Elodea bifoliata St. John
  twoleaf waterweed
Elodea canadensis Michx.
  Canadian waterweed
Elodea nuttallii (Planch.) St. John
  western waterweed
Elodea occidentalis (Pursh) St. John
  = Elodea nuttallii

HYDROPHYLLACEAE
Hesperochiron pumilus (Dougl. ex Griseb.) Porter
  dwarf hesperochiron
Hydrophyllum capitatum Dougl. ex Benth.
  ballhead waterleaf
Hydrophyllum fendleri (Gray) Heller
  Fendler's waterleaf
Nama densum J.G. Lemmon
  leafy nama
Nama dichotomum (Ruiz & Pavon) Choisy
  wishbone fiddleleaf
Nama hispidum Gray
  bristly nama
Nemophila breviflora Gray
  basin nemophila
Phacelia alba Rydb.
  white scorpionweed
Phacelia bakeri (Brand) J.F. Macbr.
  Baker's scorpionweed
Phacelia constancei Atwood
  Constance's scorpionweed
Phacelia crenulata Torr. ex S. Wats.
  cleftleaf wildheliotrope
Phacelia demissa Gray
  Intermountain scorpionweed
Phacelia denticulata Osterhout
  Rocky Mountain scorpionweed
Phacelia formosula Osterhout
  Northpark phacelia
Phacelia glandulosa Nutt.
  glandular phacelia
Phacelia hastata Dougl. ex Lehm.
  silverleaf phacelia
Phacelia heterophylla Pursh
  varileaf phacelia
Phacelia incana Brand
  hoary phacelia
Phacelia integrifolia Torr.
  gypsum scorpionweed
Phacelia ivesiana Torr.
  Ives' phacelia
Phacelia scopulina (A. Nels.) J.T. Howell
  Debeque phacelia
Phacelia scopulina var. submutica (J.T. Howell) Halse
  Debeque phacelia
Phacelia sericea (Graham) Gray
  silky phacelia
Phacelia sericea ssp. ciliosa (Rydb.) Gillett
  purplefringe
Phacelia sericea ssp. sericea (Graham) Gray
  purplefringe
Phacelia splendens Eastw.
  patch scorpionweed

IRIDACEAE
Iris missouriensis Nutt.
  Rocky Mountain iris
Sisyrinchium demissum Greene
  dwarf blueeyed grass
Sisyrinchium idahoense Bickn.
  Idaho blueeyed grass
Sisyrinchium idahoense var. occidentale (Bickn.) D. Henderson
  Idaho blueeyed grass
Sisyrinchium montanum Greene
  mountain blueeyed grass
Sisyrinchium pallidum Cholewa & D. Henderson
  pale blueeyed grass

ISOETACEAE
Isoetes bolanderi Engelm.
  Bolander's quillwort
Isoetes lacustris L.
  lake quillwort
Isoetes tenella LÇman

KRAMERIACEAE
Krameria lanceolata Torr.
  trailing krameria
Krameria secundiflora auct. non DC.
  = Krameria lanceolata

LABIATAE
Agastache Clayton ex Gronov.
  giant hyssop
Agastache foeniculum (Pursh) Kuntze
  blue giant hyssop
Agastache pallidiflora (Heller) Rydb.
  Bill Williams' Mountain giant hyssop
Agastache pallidiflora ssp. pallidiflora (Heller) Rydb.
  pallid flower giant hyssop
Agastache pallidiflora ssp. pallidiflora var. greenei (Briq.) R.W. Sanders
  Greene's giant hyssop
Agastache urticifolia (Benth.) Kuntze
  nettleleaf giant hyssop
Clinopodium vulgare L.
  wild basil
Dracocephalum parviflorum Nutt.
  American dragonhead
Galeopsis bifida Boenn.
  splitlip hempnettle
Glechoma hederacea L.
  groundivy
Hedeoma drummondii Benth.
  Drummond's falsepennyroyal
Hedeoma hispida Pursh
  rough falsepennyroyal
Hyssopus officinalis L.
  hyssop
Lamium amplexicaule L.
  henbit deadnettle
Lamium purpureum L.
  purple deadnettle
Leonurus cardiaca L.
  common motherwort
Lycopus americanus Muhl. ex W. Bart.
  American waterhorehound
Lycopus asper Greene
  rough bugleweed
Lycopus uniflorus Michx.
  northern bugleweed
Marrubium vulgare L.
  horehound
Mentha X piperita L. (pro sp.)
  peppermint
Mentha arvensis L.
  wild mint
Mentha crispa L.
  = Mentha X piperita
Mentha spicata L.
  spearmint
Mentha viridis L.
  = Mentha spicata
Moldavica parviflora (Nutt.) Britt.
  = Dracocephalum parviflorum
Monarda fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa var. menthifolia (Graham) Fern.
  wild oregano
Monarda menthifolia Graham
  = Monarda fistulosa ssp. fistulosa var. menthifolia
Monarda pectinata Nutt.
  oregano del campo
Monardella odoratissima Benth.
  Pacific monardella
Nepeta cataria L.
  catnip
Poliomintha incana (Torr.) Gray
  hoary rosemarymint
Prunella vulgaris L.
  common selfheal
Salvia X sylvestris L. (pro sp.)
  woodland sage
Salvia aethiopis L.
  Mediterranean sage
Salvia azurea Michx. ex Lam.
  azure blue sage
Salvia azurea var. grandiflora Benth.
  pitcher sage
Salvia reflexa Hornem.
  lanceleaf sage
Salvia sclarea L.
  Europe sage
Scutellaria brittonii Porter
  Britton's skullcap
Scutellaria epilobiifolia A. Hamilton
  = Scutellaria galericulata
Scutellaria galericulata L.
  marsh skullcap
Scutellaria lateriflora L.
  mad dog skullcap
Scutellaria resinosa Torr.
  = Scutellaria wrightii
Scutellaria wrightii Gray
  plains skullcap
Stachys palustris L.
  marsh hedgenettle
Stachys palustris ssp. pilosa (Nutt.) Epling
  marsh hedgenettle
Stachys rigida Nutt. ex Benth.
  = Stachys palustris ssp. pilosa
Teucrium canadense L.
  Canada germander
Teucrium canadense var. occidentale (Gray) McClintock & Epling
  western germander
Teucrium laciniatum Torr.
  lacy germander

LEGUMINOSAE
Alhagi camelorum Fisch.
  = Alhagi maurorum
Alhagi maurorum Medik.
  camelthorn
Amorpha canescens Pursh
  leadplant
Amorpha fruticosa L.
  desert indigobush
Amorpha nana Nutt.
  dwarf indigobush
Apios americana Medik.
  groundnut
Astragalus adsurgens Pallas
  standing milkvetch
Astragalus adsurgens var. robustior Hook.
  prairie milkvetch
Astragalus agrestis Dougl. ex G. Don
  purple milkvetch
Astragalus allochrous Gray
  halfmoon milkvetch
Astragalus allochrous var. playanus Isely
Astragalus alpinus L.
  alpine milkvetch
Astragalus americanus (Hook.) M.E. Jones
  American milkvetch
Astragalus amphioxys Gray
  Crescent milkvetch
Astragalus amphioxys var. vespertinus (Sheldon) M.E. Jones
  Aladdin's slippers
Astragalus aretioides (M.E. Jones) Barneby
  cushion milkvetch
Astragalus argophyllus Nutt.
  silverleaf milkvetch
Astragalus argophyllus var. martinii M.E. Jones
  silverleaf milkvetch
Astragalus asclepiadoides M.E. Jones
  milkweed milkvetch
Astragalus australis (L.) Lam.
  Indian milkvetch
Astragalus bisulcatus (Hook.) Gray
  twogrooved milkvetch
Astragalus bisulcatus var. haydenianus (Gray) Barneby
  Hayden's milkvetch
Astragalus bodinii Sheldon
  Bodin's milkvetch
Astragalus brandegei Porter
  Brandegee's milkvetch
Astragalus calycosus Torr. ex S. Wats.
  matted poison milkvetch
Astragalus calycosus var. calycosus Torr. ex S. Wats.
  Torrey's milk-vetch
Astragalus calycosus var. scaposus (Gray) M.E. Jones
  Torrey's milkvetch
Astragalus canadensis L.
  Canadian milkvetch
Astragalus canadensis var. canadensis L.
  Canadian milkvetch
Astragalus canadensis var. mortonii (Nutt.) S. Wats.
  Morton's Canadian milkvetch
Astragalus ceramicus Sheldon
  painted milkvetch
Astragalus ceramicus var. ceramicus Sheldon
  painted milkvetch
Astragalus ceramicus var. filifolius (Gray) F.J. Herm.
  painted milkvetch
Astragalus cerussatus Sheldon
  powdery milkvetch
Astragalus chamaeleuce Gray
  cicada milkvetch
Astragalus cibarius Sheldon
  silky milkvetch
Astragalus cicer L.
  cicer milkvetch
Astragalus coltonii M.E. Jones
  Colton's milkvetch
Astragalus coltonii var. moabensis M.E. Jones
  Moab milkvetch
Astragalus convallarius Greene
  timber milkvetch
Astragalus convallarius var. convallarius Greene
  timber milkvetch
Astragalus convallarius var. scopulorum Barneby
  timber milkvetch
Astragalus crassicarpus Nutt.
  groundplum milkvetch
Astragalus crassicarpus var. crassicarpus Nutt.
  groundplum milkvetch
Astragalus crassicarpus var. paysonii (E.H. Kelso) Barneby
  Payson's milkvetch
Astragalus cronquistii Barneby
  Cronquist's milkvetch
Astragalus debequaeus Welsh
  Debeque milkvetch
Astragalus desperatus M.E. Jones
  rimrock milkvetch
Astragalus deterior (Barneby) Barneby
  Cliff Palace milkvetch
Astragalus detritalis M.E. Jones
  debris milkvetch
Astragalus drummondii Dougl. ex Hook.
  Drummond's milkvetch
Astragalus duchesnensis M.E. Jones
  Duchesne milkvetch
Astragalus eastwoodiae M.E. Jones
  Eastwood's milkvetch
Astragalus eucosmus B.L. Robins.
  elegant milkvetch
Astragalus falcatus Lam.
  Russian milkvetch
Astragalus flavus Nutt.
  yellow milkvetch
Astragalus flexuosus (Hook.) Dougl. ex G. Don
  flexile milkvetch
Astragalus flexuosus var. diehlii (M.E. Jones) Barneby
  Diehl's milkvetch
Astragalus flexuosus var. flexuosus (Hook.) Dougl. ex G. Don
  flexile milkvetch
Astragalus geyeri Gray
  Geyer's milkvetch
Astragalus gilviflorus Sheldon
  plains milkvetch
Astragalus gilviflorus var. gilviflorus Sheldon
  plains milkvetch
Astragalus gracilis Nutt.
  slender milkvetch
Astragalus hallii Gray
  Hall's milkvetch
Astragalus hamiltonii C.L. Porter
  Hamilton's milkvetch
Astragalus humillimus Gray
  Mancos milkvetch
Astragalus hyalinus M.E. Jones
  summer milkvetch
Astragalus iodopetalus (Rydb.) Barneby
  violet milkvetch
Astragalus jejunus S. Wats.
  starveling milkvetch
Astragalus kentrophyta Gray
  spiny milkvetch
Astragalus kentrophyta var. elatus S. Wats.
  tall spiny milkvetch
Astragalus kentrophyta var. kentrophyta Gray
  spiny milkvetch
Astragalus kentrophyta var. tegetarius (S. Wats.) Dorn
  mat milkvetch
Astragalus lentiginosus Dougl. ex Hook.
  specklepod milkvetch
Astragalus lentiginosus var. chartaceus M.E. Jones
  broadleaf loco milkvetch
Astragalus lentiginosus var. diphysus (Gray) M.E. Jones
  speckledpod milkvetch
Astragalus lentiginosus var. palans (M.E. Jones) M.E. Jones
  speckledpod milkvetch
Astragalus leptaleus Gray
  meadow milkvetch
Astragalus linifolius Osterhout
  Grand Junction milkvetch
Astragalus lonchocarpus Torr.
  rushy milkvetch
Astragalus lotiflorus Hook.
  lotus milkvetch
Astragalus lutosus M.E. Jones
  Dragon milkvetch
Astragalus megacarpus (Nutt.) Gray
  great bladdery milkvetch
Astragalus microcymbus Barneby
  skiff milkvetch
Astragalus miser Dougl.
  weedy milkvetch
Astragalus miser var. oblongifolius (Rydb.) Cronq.
  timber milkvetch
Astragalus missouriensis Nutt.
  Missouri milkvetch
Astragalus missouriensis var. amphibolus Barneby
  Missouri milkvetch
Astragalus missouriensis var. humistratus Isely
  Missouri milkvetch
Astragalus missouriensis var. missouriensis Nutt.
  Missouri milkvetch
Astragalus mollissimus Torr.
  woolly milkvetch
Astragalus mollissimus var. mollissimus Torr.
  woolly milkvetch
Astragalus mollissimus var. thompsoniae (S. Wats.) Barneby
  Thompson's woolly milkvetch
Astragalus molybdenus Barneby
  Leadville milkvetch
Astragalus monumentalis Barneby
  Monument Valley milkvetch
Astragalus monumentalis var. cottamii (Welsh) Isely
  Cottam's milkvetch
Astragalus musiniensis M.E. Jones
  Ferron's milkvetch
Astragalus naturitensis Payson
  Naturita milkvetch
Astragalus nelsonianus Barneby
  Nelson's milkvetch
Astragalus nuttallianus DC.
  smallflowered milkvetch
Astragalus nuttallianus var. micranthiformis Barneby
  turkeypeas
Astragalus oocalycis M.E. Jones
  Arboles milkvetch
Astragalus oophorus S. Wats.
  egg milkvetch
Astragalus oophorus var. caulescens (M.E. Jones) M.E. Jones
  egg milkvetch
Astragalus osterhoutii M.E. Jones
  Kremmling milkvetch
Astragalus parryi Gray
  Parry's milkvetch
Astragalus pattersonii Gray
  Patterson's milkvetch
Astragalus pectinatus (Hook.) Dougl. ex G. Don
  narrowleaf milkvetch
Astragalus piscator Barneby & Welsh
  Fisher milkvetch
Astragalus plattensis Nutt.
  Platte River milkvetch
Astragalus praelongus Sheldon
  stinking milkvetch
Astragalus praelongus var. ellisiae (Rydb.) Barneby
  Ellis' stinking milkvetch
Astragalus praelongus var. praelongus Sheldon
  stinking milkvetch
Astragalus proximus (Rydb.) Woot. & Standl.
  Aztec milkvetch
Astragalus pubentissimus Torr. & Gray
  Green River milkvetch
Astragalus puniceus Osterhout
  Trinidad milkvetch
Astragalus purshii Dougl. ex Hook.
  woollypod milkvetch
Astragalus racemosus Pursh
  alkali poisonvetch
Astragalus racemosus var. longisetus M.E. Jones
  alkali poisonvetch
Astragalus racemosus var. racemosus Pursh
  cream milkvetch
Astragalus rafaelensis M.E. Jones
  San Rafael milkvetch
Astragalus ripleyi Barneby
  Ripley's milkvetch
Astragalus robbinsii (Oakes) Gray
  Robbins' milkvetch
Astragalus robbinsii var. minor (Hook.) Barneby
  Robbins' milkvetch
Astragalus schmolliae C.L. Porter
  Schmoll's milkvetch
Astragalus scopulorum Porter
  Rocky Mountain milkvetch
Astragalus sericoleucus Gray
  silky milkvetch
Astragalus sesquiflorus S. Wats.
  sandstone milkvetch
Astragalus shortianus Nutt.
  Short's milkvetch
Astragalus sparsiflorus Gray
  Front Range milkvetch
Astragalus spatulatus Sheldon
  tufted milkvetch
Astragalus tenellus Pursh
  looseflower milkvetch
Astragalus tridactylicus Gray
  foothill milkvetch
Astragalus wetherillii M.E. Jones
  Wetherill's milkvetch
Astragalus wingatanus S. Wats.
  Fort Wingate milkvetch
Caesalpinia drepanocarpa (Gray) Fisher
  sicklepod holdback
Caesalpinia jamesii (Torr. & Gray) Fisher
  James' holdback
Caragana arborescens Lam.
  Siberian peashrub
Caragana aurantiaca Koehne
  dwarf peashrub
Colutea arborescens L.
  bladder senna
Dalea aurea Nutt. ex Pursh
  golden prairieclover
Dalea candida Willd.
  slender white prairieclover
Dalea candida var. oligophylla (Torr.) Shinners
  white prairieclover
Dalea cylindriceps Barneby
  Andean prairieclover
Dalea enneandra Nutt.
  nineanther prairieclover
Dalea formosa Torr.
  featherplume
Dalea jamesii (Torr.) Torr. & Gray
  James' prairieclover
Dalea lanata Spreng.
  woolly prairieclover
Dalea leporina (Ait.) Bullock
  foxtail prairieclover
Dalea multiflora (Nutt.) Shinners
  roundhead prairieclover
Dalea nana Torr. ex Gray
  dwarf prairieclover
Dalea nana var. nana Torr. ex Gray
  dwarf prairieclover
Dalea purpurea Vent.
  purple prairieclover
Dalea tenuifolia (Gray) Shinners
  slimleaf prairieclover
Dalea villosa (Nutt.) Spreng.
  silky prairieclover
Desmanthus cooleyi (Eat.) Trel.
  Cooley's bundleflower
Desmanthus illinoensis (Michx.) MacM. ex B.L. Robins. & Fern.
  prairie bundleflower
Desmodium obtusum (Muhl. ex Willd.) DC.
  stiff ticktrefoil
Glycyrrhiza lepidota Pursh
  American licorice
Hedysarum boreale Nutt.
  northern sweetvetch
Hedysarum occidentale Greene
  western sweetvetch
Hoffmannseggia Cav.
  hoffmanseggia
Hoffmannseggia glauca (Ortega) Eifert
  Indian rushpea
Lathyrus brachycalyx Rydb.
  Bonneville peavine
Lathyrus eucosmus Butters & St. John
  bush vetchling
Lathyrus lanszwertii Kellogg
  thickleaf peavine
Lathyrus lanszwertii var. leucanthus (Rydb.) Dorn
  aspen peavine
Lathyrus latifolius L.
  perennial peavine
Lathyrus pauciflorus Fern.
  fewflower peavine
Lathyrus polymorphus Nutt.
  manystem peavine
Lathyrus polymorphus ssp. incanus (Sm. & Rydb.) C.L. Hitchc.
  hoary vetchling
Lathyrus polymorphus ssp. polymorphus Nutt.
  manystem peavine
Lotus tenuis Waldst. & Kit. ex Willd.
  narrowleaf birdsfoot trefoil
Lotus wrightii (Gray) Greene
  Wright's deervetch
Lupinus ammophilus Greene
  sand lupine
Lupinus argenteus Pursh
  silvery lupine
Lupinus bakeri Greene
  Baker's lupine
Lupinus bakeri ssp. amplus (Greene) Fleak & D. Dunn
  Baker's lupine
Lupinus bakeri ssp. bakeri Greene
  Baker's lupine
Lupinus brevicaulis S. Wats.
  shortstem lupine
Lupinus caespitosus Nutt.
  stemless dwarf lupine
Lupinus caudatus Kellogg
  tailcup lupine
Lupinus crassus Payson
  Paradox lupine
Lupinus kingii S. Wats.
  King's lupine
Lupinus lasalensis D. Dunn, sp. nov. ined.
  turkscap lupine
Lupinus plattensis S. Wats.
  Nebraska lupine
Lupinus prunophilus M.E. Jones
  hairy bigleaf lupine
Lupinus pusillus Pursh
  rusty lupine
Lupinus pusillus ssp. pusillus Pursh
  rusty lupine
Lupinus pusillus ssp. rubens (Rydb.) D. Dunn
  rusty lupine
Medicago lupulina L.
  black medick
Medicago sativa L.
  alfalfa
Melilotus albus Medik.
  = Melilotus officinalis
Melilotus officinalis (L.) Lam.
  yellow sweetclover
Mimosa borealis Gray
  fragrant mimosa
Onobrychis viciifolia Scop.
  sainfoin
Oxytropis borealis DC.
Oxytropis borealis var. viscida (Nutt.) Welsh
Oxytropis campestris (L.) DC.
  cold mountain crazyweed
Oxytropis campestris var. cusickii (Greenm.) Barneby
  Cusick's crazyweed
Oxytropis deflexa (Pallas) DC.
  hangpod crazyweed
Oxytropis deflexa var. sericea Torr. & Gray
  longstem hangpod crazyweed
Oxytropis lambertii Pursh
  Lambert's crazyweed
Oxytropis monticola Gray
  yellowflower locoweed
Oxytropis multiceps Nutt.
  southwestern locoweed
Oxytropis nana Nutt.
  Wyoming locoweed
Oxytropis nana var. obnapiformis (C.L. Porter) Isely
  woody crazyweed
Oxytropis parryi Gray
  Parry's crazyweed
Oxytropis podocarpa Gray
  stalkedpod locoweed
Oxytropis sericea Nutt.
  silvery oxytrope
Oxytropis splendens Dougl. ex Hook.
  showy pointvetch
Parryella filifolia Torr. & Gray ex Gray
  common dunebroom
Pediomelum argophyllum (Pursh) J. Grimes
  silverleaf scurfpea
Pediomelum aromaticum (Payson) W.A. Weber
  aromatic Indian breadroot
Pediomelum cuspidatum (Pursh) Rydb.
  largebract Indian breadroot
Pediomelum digitatum (Nutt. ex Torr. & Gray) Isely
  palmleaf Indian breadroot
Pediomelum esculentum (Pursh) Rydb.
  breadroot scurfpea
Pediomelum hypogaeum (Nutt. ex Torr. & Gray) Rydb.
  scurfpea
Pediomelum megalanthum (Woot. & Standl.) Rydb.
  Intermountain Indian breadroot
Prosopis glandulosa Torr.
  honey mesquite
Psoralea 
  = Pediomelum or Psoralidium, for whatever reason
Psoralidium lanceolatum (Pursh) Rydb.
  lemon scurfpea
Psoralidium tenuiflorum (Pursh) Rydb.
  slimflower scurfpea
Robinia neomexicana Gray
  New Mexico locust
Robinia pseudoacacia L.
  black locust
Sophora nuttalliana B.L. Turner
  silky sophora
Sophora sericea Nutt.
  = Sophora nuttalliana
Sphaerophysa salsula (Pallas) DC.
  alkali swainsonpea
Strophostyles leiosperma (Torr. & Gray) Piper
  slickseed fuzzybean
Thermopsis divaricarpa A. Nels.
Thermopsis montana var. divaricarpa (A. Nels.) Dorn
  = Thermopsis divaricarpa
Thermopsis pinetorum Greene
  = Thermopsis divaricarpa
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards.
  prairie thermopsis
Thermopsis rhombifolia var. montana (Nutt.) Isely
  mountain thermopsis
Trifolium andinum Nutt.
  Andes clover
Trifolium attenuatum Greene
  Rocky Mountain clover
Trifolium brandegei S. Wats.
  Brandegee's clover
Trifolium dasyphyllum Torr. & Gray
  alpine clover
Trifolium fragiferum L.
  strawberry clover
Trifolium gymnocarpon Nutt.
  hollyleaf clover
Trifolium hybridum L.
  alsike clover
Trifolium kingii S. Wats.
  King's clover
Trifolium longipes Nutt.
  longstalk clover
Trifolium longipes ssp. pygmaeum (Gray) J. Gillett
  pygmy clover
Trifolium longipes ssp. reflexum (A. Nels.) J. Gillett
  droopflower clover
Trifolium nanum Torr.
  dwarf clover
Trifolium parryi Gray
  Parry's clover
Trifolium parryi ssp. salictorum (Greene ex Rydb.) J. Gillett
  Parry's clover
Trifolium pratense L.
  red clover
Trifolium repens L.
  white clover
Trifolium wormskioldii Lehm.
  cows clover
Vicia americana Muhl. ex Willd.
  American vetch
Vicia americana ssp. americana Muhl. ex Willd.
  American vetch
Vicia americana ssp. minor (Hook.) C.R. Gunn
  mat vetch
Vicia ludoviciana Nutt.
  Louisiana vetch
Vicia ludoviciana ssp. ludoviciana Nutt.
  slim vetch
Vicia sativa L.
  common vetch
Vicia sativa ssp. nigra (L.) Ehrh.
  common vetch
Vicia villosa Roth
  winter vetch

LEMNACEAE
Lemna gibba L.
  swollen duckweed
Lemna minor L.
  common duckweed
Lemna minuta Kunth
  least duckweed
Lemna trisulca L.
  star duckweed
Lemna turionifera Landolt
  turion duckweed
Lemna valdiviana Phil.
  valdivia duckweed
Spirodela polyrhiza (L.) Schleiden
  giant duckweed
Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi
  northern watermeal
Wolffia columbiana Karst.
  Columbian watermeal

LENTIBULARIACEAE
Utricularia macrorhiza Le Conte
  common bladderwort
Utricularia minor L.
  lesser bladderwort
Utricularia ochroleuca R.W. Hartman
  yellowishwhite bladderwort
Utricularia vulgaris L. p.p.
  = Utricularia macrorhiza

LILIACEAE
Allium acuminatum Hook.
  tapertip onion
Allium brandegei S. Wats.
  Brandegee's onion
Allium brevistylum S. Wats.
  shortstyle onion
Allium cernuum Roth
  nodding onion
Allium geyeri S. Wats.
  Geyer's onion
Allium geyeri var. tenerum M.E. Jones
  bulbil onion
Allium macropetalum Rydb.
  largeflower wild onion
Allium nevadense S. Wats.
  Nevada onion
Allium sativum L.
  cultivated garlic
Allium schoenoprasum L.
  wild chives
Allium schoenoprasum var. sibiricum (L.) Hartman
  wild chives
Allium textile A. Nels. & J.F. Macbr.
  textile onion
Androstephium breviflorum S. Wats.
  pink funnellily
Asparagus officinalis L.
  garden asparagus
Calochortus aureus S. Wats.
  golden Mariposa lily
Calochortus flexuosus S. Wats.
  winding Mariposa lily
Calochortus gunnisonii S. Wats.
  Gunnison's Mariposa lily
Calochortus nuttallii Torr. & Gray
  sego lily
Disporum trachycarpum (S. Wats.) Benth. & Hook. f.
  roughfruit fairybells
Erythronium grandiflorum Pursh
  dogtooth lily
Fritillaria atropurpurea Nutt.
  spotted missionbells
Fritillaria pudica (Pursh) Spreng.
  yellow missionbells
Hypoxis hirsuta (L.) Coville
  common goldstar
Leucocrinum montanum Nutt. ex Gray
  common starlily
Lilium philadelphicum L.
  wood lily
Lloydia serotina (L.) Reichenb.
  common alplily
Maianthemum racemosum (L.) Link
  feathery false Solomon's seal
Maianthemum racemosum ssp. amplexicaule (Nutt.) LaFrankie
  western Solomon's seal
Maianthemum stellatum (L.) Link
  starry false Solomon's seal
Smilacina amplexicaulis Nutt.
  = Maianthemum racemosum ssp. amplexicaule
Smilacina racemosa var. amplexicaulis (Nutt.) S. Wats.
  = Maianthemum racemosum ssp. amplexicaule
Smilacina stellata (L.) Desf.
  = Maianthemum stellatum
Streptopus amplexifolius (L.) DC.
  claspleaf twistedstalk
Streptopus amplexifolius var. chalazatus Fassett
  tubercle twistedstalk
Trillium ovatum Pursh
  Pacific trillium
Veratrum tenuipetalum Heller
  Colorado false hellebore
Zigadenus elegans Pursh
  mountain deathcamas
Zigadenus elegans ssp. elegans Pursh
  mountain deathcamas
Zigadenus paniculatus (Nutt.) S. Wats.
  foothill deathcamas
Zigadenus vaginatus (Rydb.) J.F. Macbr.
  sheathed deathcamas
Zigadenus venenosus S. Wats.
  meadow deathcamas
Zigadenus venenosus var. venenosus S. Wats.
  meadow deathcamas

LIMNANTHACEAE
Floerkea proserpinacoides Willd.
  false mermaidweed

LINACEAE
Linum aristatum Engelm.
  bristle flax
Linum australe Heller
  southern flax
Linum australe var. australe Heller
  southern flax
Linum grandiflorum Desf.
  flowering flax
Linum lewisii Pursh
  prairie flax
Linum lewisii var. lewisii Pursh
  Lewis' flax
Linum pratense (J.B.S. Norton) Small
  meadow flax
Linum puberulum (Engelm.) Heller
  plains flax
Linum rigidum Pursh
  stiffstem flax
Linum rigidum var. rigidum Pursh
  largeflower yellow flax
Linum usitatissimum L.
  common flax

LOASACEAE
Mentzelia albicaulis (Dougl. ex Hook.) Dougl. ex Torr. & Gray
  whitestem blazingstar
Mentzelia argillosa J. Darl.
  Arapien blazingstar
Mentzelia chrysantha Engelm. ex Brandeg.
  gold blazingstar
Mentzelia cronquistii H.J. Thompson & Prigge
  Cronquist's blazingstar
Mentzelia decapetala (Pursh ex Sims) Urban & Gilg ex Gilg
  tenpetal blazingstar
Mentzelia densa Greene
  Royal Gorge blazingstar
Mentzelia dispersa S. Wats.
  bushy blazingstar
Mentzelia dispersa var. dispersa S. Wats.
  bushy blazingstar
Mentzelia humilis (Gray) J. Darl.
  gypsum blazingstar
Mentzelia laciniata (Rydb.) J. Darl.
  cutleaf blazingstar
Mentzelia marginata (Osterhout) H.J. Thompson & Prigge
  Colorado blazingstar
Mentzelia multicaulis (Osterhout) A. Nels. ex J. Darl.
  manystem blazingstar
Mentzelia multicaulis var. multicaulis (Osterhout) A. Nels. ex J. Darl.
  manystem blazingstar
Mentzelia multiflora (Nutt.) Gray
  manyflowered mentzelia
Mentzelia multiflora var. multiflora (Nutt.) Gray
  adonis blazingstar
Mentzelia nuda (Pursh) Torr. & Gray
  bractless blazingstar
Mentzelia nuda var. nuda (Pursh) Torr. & Gray
  bractless blazingstar
Mentzelia oligosperma Nutt. ex Sims
  chickenthief
Mentzelia pterosperma Eastw.
  wingseed blazingstar
Mentzelia reverchonii (Urban & Gilg) H.J. Thompson & Zavortink
  Reverchon's blazingstar
Mentzelia rusbyi Woot.
  Rusby's blazingstar
Mentzelia sinuata (Rydb.) R.J. Hill
  leechleaf blazingstar
Mentzelia speciosa Osterhout
  jeweled blazingstar

LYCOPODIACEAE
Huperzia selago (L.) Bernh. ex Mart. & Schrank
  fir clubmoss
Lycopodium annotinum L.
  stiff clubmoss
Lycopodium annotinum var. pungens (La Pylaie) Desv.
  stiff clubmoss

LYTHRACEAE
Ammannia robusta Heer & Regel
  grand redstem
Lythrum alatum Pursh
  winged lythrum
Lythrum salicaria L.
  purple loosestrife
Rotala ramosior (L.) Koehne
  lowland rotala

MALVACEAE
Abutilon incanum (Link) Sweet
  pelotazo
Abutilon parvulum Gray
  dwarf Indian mallow
Abutilon theophrasti Medik.
  velvetleaf
Alcea rosea L.
  hollyhock
Althaea rosea (L.) Cav.
  = Alcea rosea
Anoda cristata (L.) Schlecht.
  crested anoda
Callirhoe involucrata (Torr. & Gray) Gray
  purple poppymallow
Hibiscus trionum L.
  flower of an hour
Iliamna crandallii (Rydb.) Wiggins
  Crandall's wildhollyhock
Iliamna grandiflora (Rydb.) Wiggins
  wild hollyhock
Iliamna rivularis (Dougl. ex Hook.) Greene
  streambank globemallow
Malva crispa (L.) L.
  curly mallow
Malva neglecta Wallr.
  common mallow
Malva parviflora L.
  cheeseweed mallow
Malvella leprosa (Ortega) Krapov.
  alkali mallow
Malvella sagittifolia (Gray) Fryxell
  arrowleaf mallow
Sida hederacea (Dougl. ex Hook.) Torr. ex Gray
  = Malvella leprosa
Sidalcea candida Gray
  white checkermallow
Sidalcea neomexicana Gray
  New Mexico checkermallow
Sphaeralcea angustifolia (Cav.) G. Don
  copper globemallow
Sphaeralcea coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. elata (E.G. Baker) Kearney
  scarlet globemallow
Sphaeralcea fendleri Gray
  Fendler's globemallow
Sphaeralcea leptophylla (Gray) Rydb.
  scaly globemallow
Sphaeralcea parvifolia A. Nels.
  smallflower globemallow

MARSILEACEAE
Marsilea vestita Hook. & Grev.
  hairy pepperwort
Marsilea vestita ssp. vestita Hook. & Grev.
  hairy pepperwort

MENYANTHACEAE
Menyanthes trifoliata L.
  common buckbean

MOLLUGINACEAE
Mollugo verticillata L.
  green carpetweed

MONOTROPACEAE
Monotropa hypopithys L.
  pinesap
Pterospora andromedea Nutt.
  woodland pinedrops

MORACEAE
Maclura pomifera (Raf.) Schneid.
  osageorange
Morus alba L.
  white mulberry

NAJADACEAE
Najas guadalupensis (Spreng.) Magnus
  southern waternymph

NYCTAGINACEAE
Abronia argillosa Welsh & Goodrich
  clay sand verbena
Abronia carletonii Coult. & Fisher
  Carleton's sand verbena
Abronia elliptica A. Nels.
  fragrant white sand verbena
Abronia fragrans Nutt. ex Hook.
  snowball sand verbena
Abronia nana S. Wats.
  dwarf sand verbena
Allionia choisyi Standl.
  annual windmills
Allionia incarnata L.
  trailing windmills
Mirabilis albida (Walt.) Heimerl
  white four o'clock
Mirabilis alipes (S. Wats.) Pilz
  winged four o'clock
Mirabilis glabra (S. Wats.) Standl.
  smooth four o'clock
Mirabilis hirsuta (Pursh) MacM.
  hairy four o'clock
Mirabilis linearis (Pursh) Heimerl
  narrowleaf four o'clock
Mirabilis multiflora (Torr.) Gray
  Colorado four o'clock
Mirabilis multiflora var. glandulosa (Standl.) J.F. Macbr.
  Colorado four o'clock
Mirabilis nyctaginea (Michx.) MacM.
  heartleaf four o'clock
Mirabilis oxybaphoides (Gray) Gray
  smooth spreading four o'clock
Mirabilis rotundifolia (Greene) Standl.
  roundleaf four o'clock
Oxybaphus 
  = Mirabilis 
Tripterocalyx carnea (Greene) L.A. Gal.
  winged sandpuffs
Tripterocalyx carnea var. wootonii (Standl.) L.A. Gal.
  Wooton's sandpuffs
Tripterocalyx micranthus (Torr.) Hook.
  smallflower sandverbena

NYMPHAEACEAE
Nuphar lutea (L.) Sm.
  yellow pondlily
Nuphar lutea ssp. polysepala (Engelm.) E.O. Beal
  Rocky Mountain pondlily
Nuphar polysepala Engelm.
  = Nuphar lutea ssp. polysepala
Nymphaea odorata Ait.
  American white waterlily

OLEACEAE
Forestiera pubescens Nutt.
  stretchberry
Fraxinus americana L.
  white ash
Fraxinus anomala Torr. ex S. Wats.
  singleleaf ash
Fraxinus pennsylvanica Marsh.
  green ash
Menodora scabra Gray
  rough menodora

ONAGRACEAE
Calylophus berlandieri Spach
  Berlandier's sundrops
Calylophus hartwegii (Benth.) Raven
  Hartweg's sundrops
Calylophus hartwegii ssp. pubescens (Gray) Towner & Raven
  Hartweg's sundrops
Calylophus lavandulifolius (Torr. & Gray) Raven
  lavenderleaf sundrops
Calylophus serrulatus (Nutt.) Raven
  yellow sundrops
Camissonia andina (Nutt.) Raven
  sundrops eveningprimrose
Camissonia breviflora (Torr. & Gray) Raven
  fewflower eveningprimrose
Camissonia eastwoodiae (Munz) Raven
  Grand Junction camissonia
Camissonia minor (A. Nels.) Raven
  small eveningprimrose
Camissonia parvula (Nutt. ex Torr. & Gray) Raven
  Lewis River suncup
Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven
  barestem eveningprimrose
Camissonia subacaulis (Pursh) Raven
  diffuseflower eveningprimrose
Camissonia walkeri (A. Nels.) Raven
  Walker's suncup
Circaea alpina L.
  small enchanter's nightshade
Circaea alpina ssp. alpina L.
  small enchanter's nightshade
Circaea alpina ssp. pacifica (Aschers. & Magnus) Raven
  small enchanter's nightshade
Epilobium anagallidifolium Lam.
  alpine willowherb
Epilobium angustifolium L.
  fireweed
Epilobium angustifolium ssp. circumvagum Mosquin
  fireweed
Epilobium brachycarpum K. Presl
  autumn willowweed
Epilobium ciliatum Raf.
  hairy willowherb
Epilobium ciliatum ssp. ciliatum Raf.
  coast willowweed
Epilobium ciliatum ssp. glandulosum (Lehm.) Hoch & Raven
  glandular willowweed
Epilobium clavatum Trel.
  clubfruit willowherb
Epilobium halleanum Hausskn.
  glandular willowherb
Epilobium hornemannii Reichenb.
  Hornemann's willowherb
Epilobium lactiflorum Hausskn.
  milkflower willowweed
Epilobium latifolium L.
  dwarf fireweed
Epilobium leptophyllum Raf.
  bog willowherb
Epilobium palustre L.
  marsh willowherb
Epilobium saximontanum Hausskn.
  Rocky Mountain willowherb
Gaura coccinea Nutt. ex Pursh
  scarlet beeblossom
Gaura neomexicana Woot.
  New Mexico beeblossom
Gaura neomexicana ssp. coloradensis (Rydb.) Raven & Gregory
  Colorado beeblossom
Gaura neomexicana ssp. neomexicana Woot.
  New Mexico beeblossom
Gaura parviflora Dougl. ex Lehm.
  velvetweed
Gaura villosa Torr.
  woolly beeblossom
Gayophytum decipiens Lewis & Szweykowski
  deceptive groundsmoke
Gayophytum diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum diffusum ssp. parviflorum Lewis & Szweykowski
  spreading groundsmoke
Gayophytum racemosum Torr. & Gray
  blackfoot groundsmoke
Gayophytum ramosissimum Torr. & Gray
  pinyon groundsmoke
Oenothera acutissima W.L. Wagner
  Flaming Gorge eveningprimrose
Oenothera albicaulis Pursh
  whitest eveningprimrose
Oenothera canescens Torr. & Frem.
  spotted eveningprimrose
Oenothera cespitosa Nutt.
  tufted eveningprimrose
Oenothera cespitosa ssp. cespitosa Nutt.
  tufted eveningprimrose
Oenothera cespitosa ssp. macroglottis (Rydb.) W.L. Wagner
  tufted eveningprimrose
Oenothera cespitosa ssp. marginata (Nutt. ex Hook. & Arn.) Munz
  tufted eveningprimrose
Oenothera cespitosa ssp. navajoensis W.L. Wagner, Stockhouse & Klein
  Navajo eveningprimrose
Oenothera coronopifolia Torr. & Gray
  crownleaf eveningprimrose
Oenothera elata Kunth
  Hooker's eveningprimrose
Oenothera elata ssp. hirsutissima (Gray ex S. Wats.) W. Dietr.
  Hooker's eveningprimrose
Oenothera engelmannii (Small) Munz
  Engelmann's eveningprimrose
Oenothera flava (A. Nels.) Garrett
  yellow eveningprimrose
Oenothera grandis (Britt.) Smyth
  showy eveningprimrose
Oenothera harringtonii W.L. Wagner
  Colorado Springs eveningprimrose
Oenothera howardii (A. Nels.) W.L. Wagner
  Howard's eveningprimrose
Oenothera kleinii W.L. Wagner & S. Mill.
  Wolf Creek eveningprimrose
Oenothera latifolia (Rydb.) Munz
  mountain eveningprimrose
Oenothera longissima Rydb.
  longstem eveningprimrose
Oenothera nuttallii Sweet
  Nuttall's eveningprimrose
Oenothera pallida Lindl.
  pale eveningprimrose
Oenothera pallida ssp. pallida Lindl.
  pale eveningprimrose
Oenothera pallida ssp. runcinata (Engelm.) Munz & W. Klein
  pale eveningprimrose
Oenothera pallida ssp. trichocalyx (Nutt.) Munz & W. Klein
  pale eveningprimrose
Oenothera villosa Thunb.
  hairy eveningprimrose
Oenothera villosa ssp. strigosa (Rydb.) W. Dietr. & Raven
  hairy eveningprimrose
Stenosiphon linifolius (Nutt. ex James) Heynh.
  false gaura

OPHIOGLOSSACEAE
Botrychium campestre W.H. Wagner & Farrar
  Iowa moonwort
Botrychium echo W.H. Wagner
  reflected grapefern
Botrychium hesperium (Maxon & Clausen) W.H. Wagner & Lellinger
  western moonwort
Botrychium lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lineare W.H. Wagner
  narrowleaf grapefern
Botrychium multifidum (Gmel.) Trev.
  leathery grapefern
Botrychium pallidum W.H. Wagner
  pale botrychium
Botrychium pinnatum St. John
  northern moonwort
Botrychium simplex E. Hitchc.
  little grapefern
Botrychium virginianum (L.) Sw.
  rattlesnake fern

ORCHIDACEAE
Calypso bulbosa (L.) Oakes
  fairyslipper orchid
Coeloglossum viride (L.) Hartman
  longbract frog orchid
Coeloglossum viride var. virescens (Muhl. ex Willd.) Luer
  longbract frog orchid
Corallorrhiza maculata (Raf.) Raf.
  summer coralroot
Corallorrhiza striata Lindl.
  hooded coralroot
Corallorrhiza trifida Chatelain
  yellow coralroot
Corallorrhiza wisteriana Conrad
  spring coralroot
Cypripedium calceolus ssp. parviflorum (Salisb.) Hulten
  = Cypripedium parviflorum
Cypripedium fasciculatum Kellogg ex S. Wats.
  clustered lady's slipper
Cypripedium parviflorum Salisb.
  lesser yellow lady's slipper
Epipactis gigantea Dougl. ex Hook.
  giant helleborine
Goodyera oblongifolia Raf.
  western rattlesnake plantain
Goodyera repens (L.) R. Br. ex Ait. f.
  lesser rattlesnake plantain
Habenaria .
  = Platanthera 
Listera borealis Morong
  northern twayblade
Listera convallarioides (Sw.) Nutt. ex Ell.
  broadlipped twayblade
Listera cordata (L.) R. Br. ex Ait. f.
  heartleaf twayblade
Listera cordata var. nephrophylla (Rydb.) Hulten
  heartleaf twayblade
Malaxis brachypoda (Gray) Fern.
  white addersmouth orchid
Piperia unalascensis (Spreng.) Rydb.
  Alaska rein orchid
Platanthera dilatata (Pursh) Lindl. ex Beck
  boreal bog orchid
Platanthera dilatata var. albiflora (Cham.) Ledeb.
  scentbottle
Platanthera hyperborea (L.) Lindl.
  northern green orchid
Platanthera hyperborea var. hyperborea (L.) Lindl.
  northern green orchid
Platanthera obtusata (Banks ex Pursh) Lindl.
  blunt bog orchid
Platanthera zothecina (Higgins & Welsh) Kartesz & Gandhi
  alcove bog orchid
Spiranthes diluvialis Sheviak
  diluvim ladiestresses
Spiranthes romanzoffiana Cham.
  hooded ladiestresses

OROBANCHACEAE
Conopholis alpina Liebm.
  alpine squawroot
Conopholis alpina var. mexicana (Gray ex S. Wats.) Haynes
  Mexican squawroot
Orobanche ludoviciana Nutt.
  Louisiana broomrape
Orobanche ludoviciana ssp. ludoviciana Nutt.
  sand broomrape
Orobanche ludoviciana ssp. multiflora (Nutt.) Collins, comb. nov. ined.
  manyflowered broomrape

OXALIDACEAE
Oxalis dillenii Jacq.
  Dillen's oxalis
Oxalis stricta L.
  common yellow oxalis
Oxalis violacea L.
  violet woodsorrel

PAPAVERACEAE
Argemone hispida Gray
  rough pricklypoppy
Argemone polyanthemos (Fedde) G.B. Ownbey
  crested pricklypoppy
Argemone squarrosa Greene
  hedgehog pricklypoppy
Eschscholzia californica Cham.
  California poppy
Glaucium flavum Crantz
  yellow hornpoppy
Papaver croceum Ledeb.
  ice poppy
Papaver lapponicum (Tolm.) Nordh.
  Arctic poppy
Papaver lapponicum ssp. occidentale (Lundstr.) Knaben
  Lapland poppy
Papaver orientale L.
  oriental poppy

PEDALIACEAE
Martynia proboscidea Gloxin
  = Proboscidea louisianica
Proboscidea louisianica (P. Mill.) Thellung
  common devilsclaw

PINACEAE
Abies concolor (Gord. & Glend.) Lindl. ex Hildebr.
  white fir
Abies lasiocarpa (Hook.) Nutt.
  subalpine fir
Abies lasiocarpa var. arizonica (Merriam) Lemmon
  corkbark fir
Picea engelmannii Parry ex Engelm.
  Engelmann's spruce
Picea pungens Engelm.
  blue spruce
Pinus aristata Engelm.
  bristlecone pine
Pinus contorta Dougl. ex Loud.
  lodgepole pine
Pinus contorta var. latifolia Engelm. ex S. Wats.
  tall lodgepole pine
Pinus edulis Engelm.
  twoneedle pinyon
Pinus flexilis James
  limber pine
Pinus ponderosa P.& C. Lawson
  ponderosa pine
Pinus ponderosa var. scopulorum Engelm.
  ponderosa pine
Pinus strobiformis Engelm.
  southwestern white pine
Pseudotsuga menziesii (Mirbel) Franco
  Douglas fir

PLANTAGINACEAE
Plantago elongata Pursh
  longleaf plantain
Plantago eriopoda Torr.
  redwool plantain
Plantago lanceolata L.
  narrowleaf plantain
Plantago major L.
  common plantain
Plantago patagonica Jacq.
  woolly plantain
Plantago tweedyi Gray
  Tweedy's plantain

PLUMBAGINACEAE
Armeria maritima (P. Mill.) Willd.
  thrift seapink
Armeria maritima ssp. sibirica (Turcz. ex Boiss.) Nyman
  Siberian sea thrift

POLEMONIACEAE
Collomia grandiflora Dougl. ex Lindl.
  largeflower mountaintrumpet
Collomia linearis Nutt.
  narrowleaf mountaintrumpet
Eriastrum diffusum (Gray) Mason
  miniature woolstar
Gilia clokeyi Mason
  Clokey's gilia
Gilia haydenii Gray
  San Juan gilia
Gilia inconspicua (Sm.) Sweet
  shy gilia
Gilia micromeria Gray
  dainty gilia
Gilia ophthalmoides Brand
  eyed gilia
Gilia penstemonoides M.E. Jones
  Black Canyon gilia
Gilia pinnatifida Nutt. ex Gray
  sticky gilia
Gilia rigidula Benth.
  bluebowls
Gilia rigidula ssp. acerosa (Gray) Wherry
  bluebowls
Gilia sinistra M.E. Jones
  Alva Day's gilia
Gilia sinuata Dougl. ex Benth.
  rosy gilia
Gilia stenothyrsa Gray
  Uinta Basin gilia
Gilia subnuda Torr. ex Gray
  coral gilia
Gilia triodon Eastw.
  coyote gilia
Gilia tweedyi Rydb.
  Tweedy's gila
Gymnosteris parvula Heller
  smallflower gymnosteris
Ipomopsis aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis aggregata ssp. aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis aggregata ssp. attenuata (Gray) V.& A. Grant
  scarlet skyrocket
Ipomopsis aggregata ssp. candida (Rydb.) V.& A. Grant
  scarlet skyrocket
Ipomopsis aggregata ssp. collina (Greene) Wilken & Allred
  scarlet skyrocket
Ipomopsis aggregata ssp. formosissima (Greene) Wherry
  scarlet skyrocket
Ipomopsis aggregata ssp. weberi V. Grant & Wilken
  Weber's gilia
Ipomopsis congesta (Hook.) V. Grant
  ballhead gilia
Ipomopsis congesta ssp. congesta (Hook.) V. Grant
  ballhead gilia
Ipomopsis congesta ssp. crebrifolia (Nutt.) Day
  ballhead gilia
Ipomopsis congesta ssp. frutescens (Rydb.) Day
  ballhead gilia
Ipomopsis globularis (Brand) W.A. Weber
  Hoosier Pass skyrocket
Ipomopsis gunnisonii (Torr. & Gray) V. Grant
  sanddune skyrocket
Ipomopsis laxiflora (Coult.) V. Grant
  iron skyrocket
Ipomopsis longiflora (Torr.) V. Grant
  flaxflowered gilia
Ipomopsis multiflora (Nutt.) V. Grant
  manyflowered gilia
Ipomopsis polyantha (Rydb.) V. Grant
  Pagosa skyrocket
Ipomopsis polycladon (Torr.) V. Grant
  manybranched gilia
Ipomopsis pumila (Nutt.) V. Grant
  dwarf gilia
Ipomopsis roseata (Rydb.) V. Grant
  rosy skyrocket
Ipomopsis spicata (Nutt.) V. Grant
  spiked gilia
Ipomopsis tenuituba (Rydb.) V. Grant
  slendertube skyrocket
Leptodactylon caespitosum Nutt.
  mat pricklygilia
Leptodactylon pungens (Torr.) Torr. ex Nutt.
  granite pricklygilia
Leptodactylon watsonii (Gray) Rydb.
  Watson's pricklygilia
Linanthus nuttallii (Gray) Greene ex Milliken
  Nuttall's deserttrumpets
Linanthus nuttallii ssp. nuttallii (Gray) Greene ex Milliken
  Nuttall's deserttrumpets
Linanthus septentrionalis Mason
  northern linanthus
Navarretia breweri (Gray) Greene
  Brewer's navarretia
Navarretia leucocephala Benth.
  whitehead navarretia
Navarretia leucocephala ssp. minima (Nutt.) Day
  least navarretia
Phlox andicola E. Nels.
  prairie phlox
Phlox austromontana Coville
  desert phlox
Phlox caryophylla Wherry
  clove phlox
Phlox condensata (Gray) E. Nels.
  dwarf phlox
Phlox gracilis (Hook.) Greene
  slender phlox
Phlox gracilis ssp. humilis (Greene) Mason
  dwarf phlox
Phlox hoodii Richards.
  spiny phlox
Phlox hoodii ssp. muscoides (Nutt.) Wherry
  musk phlox
Phlox longifolia Nutt.
  longleaf phlox
Phlox multiflora A. Nels.
  flowery phlox
Phlox pulvinata (Wherry) Cronq.
  cushion phlox
Polemonium brandegei (Gray) Greene
  Brandegee's Jacobsladder
Polemonium confertum Gray
  Rocky Mountain Jacobsladder
Polemonium foliosissimum Gray
  towering Jacobsladder
Polemonium occidentale Greene
  western polemonium
Polemonium occidentale ssp. occidentale Greene
  western polemonium
Polemonium pulcherrimum Hook.
  skunkleaf polemonium
Polemonium pulcherrimum ssp. delicatum (Rydb.) Brand
  skunkweed polemonium
Polemonium viscosum Nutt.
  sticky polemonium

POLYGALACEAE
Polygala alba Nutt.
  white milkwort
Polygala subspinosa S. Wats.
  spiny polygala

POLYGONACEAE
Eriogonum acaule Nutt.
  singlestem buckwheat
Eriogonum alatum Torr.
  winged buckwheat
Eriogonum alatum var. alatum Torr.
  winged buckwheat
Eriogonum annuum Nutt.
  annual buckwheat
Eriogonum batemanii M.E. Jones
  Bateman's buckwheat
Eriogonum bicolor M.E. Jones
  pretty buckwheat
Eriogonum brandegei Rydb.
  Brandegee's buckwheat
Eriogonum brevicaule Nutt.
  shortstem buckwheat
Eriogonum cernuum Nutt.
  nodding buckwheat
Eriogonum clavellatum Small
  Comb Wash buckwheat
Eriogonum coloradense Small
  Colorado buckwheat
Eriogonum contortum Small
  grand buckwheat
Eriogonum corymbosum Benth.
  crispleaf buckwheat
Eriogonum corymbosum var. corymbosum Benth.
  crispleaf buckwheat
Eriogonum corymbosum var. orbiculatum (S. Stokes) Reveal & Brotherson
  roundleaf buckwheat
Eriogonum divaricatum Hook.
  divergent buckwheat
Eriogonum effusum Nutt.
  spreading buckwheat
Eriogonum ephedroides Reveal
  ephedra buckwheat
Eriogonum exilifolium Reveal
  dropleaf buckwheat
Eriogonum gordonii Benth.
  Gordon's buckwheat
Eriogonum heracleoides Nutt.
  parsnipflower buckwheat
Eriogonum hookeri S. Wats.
  Hooker's buckwheat
Eriogonum inflatum Torr. & Frem.
  Native American pipeweed
Eriogonum inflatum var. fusiforme (Small) Reveal
  Native American pipeweed
Eriogonum inflatum var. inflatum Torr. & Frem.
  Native American pipeweed
Eriogonum jamesii Benth.
  James' buckwheat
Eriogonum jamesii var. flavescens S. Wats.
  James' buckwheat
Eriogonum jamesii var. jamesii Benth.
  James' buckwheat
Eriogonum jamesii var. xanthum (Small) Reveal
  James' buckwheat
Eriogonum lachnogynum Torr. ex Benth.
  woollycup buckwheat
Eriogonum leptocladon Torr. & Gray
  sand buckwheat
Eriogonum leptocladon var. leptocladon Torr. & Gray
  sand buckwheat
Eriogonum leptocladon var. ramosissimum (Eastw.) Reveal
  sand buckwheat
Eriogonum leptophyllum (Torr. & Gray) Woot. & Standl.
  slenderleaf buckwheat
Eriogonum lonchophyllum Torr. & Gray
  spearleaf buckwheat
Eriogonum lonchophyllum var. fendlerianum (Benth.) Reveal
  spearleaf buckwheat
Eriogonum lonchophyllum var. saurinum (Reveal) Welsh
  spearleaf buckwheat
Eriogonum microthecum Nutt.
  slender buckwheat
Eriogonum microthecum var. laxiflorum Hook.
  slender buckwheat
Eriogonum microthecum var. simpsonii (Benth.) Reveal
  Simpson's buckwheat
Eriogonum ovalifolium Nutt.
  cushion buckwheat
Eriogonum palmerianum Reveal
  Palmer's buckwheat
Eriogonum pauciflorum Pursh
  fewflower buckwheat
Eriogonum pauciflorum var. gnaphalodes (Benth.) Reveal
  fewflower buckwheat
Eriogonum pauciflorum var. pauciflorum Pursh
  fewflower buckwheat
Eriogonum pelinophilum Reveal
  clayloving buckwheat
Eriogonum racemosum Nutt.
  redroot buckwheat
Eriogonum rotundifolium Benth.
  roundleaf buckwheat
Eriogonum scabrellum Reveal
  Westwater buckwheat
Eriogonum shockleyi S. Wats.
  Shockley's buckwheat
Eriogonum shockleyi var. shockleyi S. Wats.
  Shockley's buckwheat
Eriogonum tenellum Torr.
  tall buckwheat
Eriogonum tumulosum (Barneby) Reveal
  Woodside buckwheat
Eriogonum umbellatum Torr.
  sulphur wildbuckwheat
Eriogonum umbellatum var. aureum (Gandog.) Reveal
  sulphurflower buckwheat
Eriogonum umbellatum var. majus Hook.
  sulphurflower buckwheat
Eriogonum umbellatum var. porteri (Small) S. Stokes
  Porter's buckwheat
Eriogonum umbellatum var. subaridum S. Stokes
  sulphurflower buckwheat
Eriogonum umbellatum var. umbellatum Torr.
  sulphurflower buckwheat
Eriogonum viridulum Reveal
  clay hill buckwheat
Eriogonum wetherillii Eastw.
  Wetherill's buckwheat
Fagopyrum esculentum Moench
  fagopyrum
Koenigia islandica L.
  island purslane
Oxyria digyna (L.) Hill
  alpine mountainsorrel
Polygonum achoreum Blake
  leathery knotweed
Polygonum amphibium L.
  water knotweed
Polygonum amphibium var. emersum Michx.
  longroot smartweed
Polygonum arenastrum Jord. ex Boreau
  ovalleaf knotweed
Polygonum argyrocoleon Steud. ex Kunze
  silversheath knotweed
Polygonum aubertii Henry
  Chinese fleecevine
Polygonum aviculare L.
  prostrate knotweed
Polygonum bellardii All.
  narrowleaf knotweed
Polygonum bistortoides Pursh
  American bistort
Polygonum convolvulus L.
  black bindweed
Polygonum convolvulus var. convolvulus L.
  black bindweed
Polygonum cuspidatum Sieb. & Zucc.
  Japanese knotweed
Polygonum douglasii Greene
  Douglas' knotweed
Polygonum douglasii ssp. engelmannii (Greene) Kartesz & Gandhi
  Engelmann's knotweed
Polygonum hydropiper L.
  marshpepper knotweed
Polygonum lapathifolium L.
  curlytop knotweed
Polygonum lapathifolium var. lapathifolium L.
  curlytop knotweed
Polygonum minimum S. Wats.
  broadleaf knotweed
Polygonum pensylvanicum L.
  Pennsylvania smartweed
Polygonum persicaria L.
  spotted ladysthumb
Polygonum polygaloides Wallich ex Meisn.
  polygala knotweed
Polygonum polygaloides ssp. kelloggii (Greene) Hickman
  Kellogg's knotweed
Polygonum punctatum Ell.
  dotted smartweed
Polygonum punctatum var. punctatum Ell.
  dotted smartweed
Polygonum ramosissimum Michx.
  bushy knotweed
Polygonum sagittatum L.
  arrowleaf tearthumb
Polygonum scandens L.
  climbing false buckwheat
Polygonum scandens var. scandens L.
  climbing false buckwheat
Polygonum viviparum L.
  alpine bistort
Rheum rhaponticum L.
  false rhubarb
Rumex acetosella L.
  common sheep sorrel
Rumex altissimus Wood
  pale dock
Rumex aquaticus L.
  western dock
Rumex aquaticus var. fenestratus (Greene) Dorn
  western dock
Rumex crispus L.
  curly dock
Rumex densiflorus Osterhout
  denseflowered dock
Rumex hymenosepalus Torr.
  canaigre dock
Rumex maritimus L.
  golden dock
Rumex obtusifolius L.
  bitter dock
Rumex paucifolius Nutt.
  fewleaved dock
Rumex paucifolius ssp. paucifolius Nutt.
  fewleaved dock
Rumex salicifolius Weinm.
  willow dock
Rumex salicifolius var. mexicanus (Meisn.) C.L. Hitchc.
  Mexican dock
Rumex stenophyllus Ledeb.
  narrowleaf dock
Rumex venosus Pursh
  veiny dock
Stenogonum flexum (M.E. Jones) Reveal & J.T. Howell
  bent twowhorl buckwheat
Stenogonum salsuginosum Nutt.
  salty eriogonum

POLYPODIACEAE
Polypodium amorphum Suksdorf
  irregular polypody
Polypodium hesperium Maxon
  western polypody

PONTEDERIACEAE
Heteranthera dubia (Jacq.) MacM.
  grassleaf mudplantain
Heteranthera limosa (Sw.) Willd.
  blue mudplantain

PORTULACACEAE
Claytonia lanceolata Pursh
  lanceleaf springbeauty
Claytonia megarhiza (Gray) Parry ex S. Wats.
  alpine springbeauty
Claytonia perfoliata Donn ex Willd.
  miner's lettuce
Claytonia perfoliata ssp. perfoliata Donn ex Willd.
  miner's lettuce
Claytonia perfoliata ssp. perfoliata var. perfoliata Donn ex Willd.
  miner's lettuce
Claytonia rosea Rydb.
  western springbeauty
Lewisia nevadensis (Gray) B.L. Robins.
  Nevada bitterroot
Lewisia pygmaea (Gray) B.L. Robins.
  pigmy bitterroot
Lewisia rediviva Pursh
  Oregon bitterroot
Lewisia triphylla (S. Wats.) B.L. Robins.
  threeleaf lewisia
Montia chamissoi (Ledeb. ex Spreng.) Greene
  water minerslettuce
Montia perfoliata (Donn ex Willd.) T.J. Howell
  = Claytonia perfoliata ssp. perfoliata
Portulaca halimoides L.
  silkcotton purslane
Portulaca oleracea L.
  little hogweed
Portulaca oleracea ssp. oleracea L.
  little hogweed
Talinum calycinum Engelm.
  largeflower fameflower
Talinum parviflorum Nutt.
  sunbright

POTAMOGETONACEAE
Potamogeton alpinus Balbis
  alpine pondweed
Potamogeton amplifolius Tuckerman
  largeleaf pondweed
Potamogeton crispus L.
  curly pondweed
Potamogeton diversifolius Raf.
  waterthread pondweed
Potamogeton epihydrus Raf.
  ribbonleaf pondweed
Potamogeton filiformis Pers.
  fineleaf pondweed
Potamogeton foliosus Raf.
  leafy pondweed
Potamogeton gramineus L.
  variableleaf pondweed
Potamogeton illinoensis Morong
  Illinois pondweed
Potamogeton natans L.
  floating pondweed
Potamogeton nodosus Poir.
  longleaf pondweed
Potamogeton pectinatus L.
  sago pondweed
Potamogeton praelongus Wulfen
  whitestem pondweed
Potamogeton pusillus L.
  small pondweed
Potamogeton pusillus var. pusillus L.
  small pondweed
Potamogeton pusillus var. tenuissimus Mert. & Koch
  small pondweed
Potamogeton richardsonii (Benn.) Rydb.
  Richardson's pondweed
Potamogeton vaginatus Turcz.
  sheathed pondweed

PRIMULACEAE
Anagallis minima (L.) Krause
  chaffweed
Androsace chamaejasme Wulfen
  sweetflower rockjasmine
Androsace chamaejasme ssp. carinata (Torr.) Hulten
  sweetflower rockjasmine
Androsace filiformis Retz.
  filiform rockjasmine
Androsace occidentalis Pursh
  western rockjasmine
Androsace septentrionalis L.
  pygmyflower rockjasmine
Dodecatheon pulchellum (Raf.) Merr.
  darkthroat shootingstar
Glaux maritima L.
  sea milkwort
Glaux maritima ssp. obtusifolia (Fern.) Boivin
  sea milkwort
Lysimachia ciliata L.
  fringed loosestrife
Lysimachia nummularia L.
  creeping jenny
Lysimachia thyrsiflora L.
  tufted loosestrife
Lysimachia vulgaris L.
  garden yellow loosestrife
Primula angustifolia Torr.
  alpine primrose
Primula egaliksensis Wormsk. ex Hornem.
  Greenland primrose
Primula incana M.E. Jones
  silvery primrose
Primula parryi Gray
  Parry's primrose

PTERIDACEAE
Adiantum capillus-veneris L.
  common maidenhair
Adiantum pedatum L.
  northern maidenhair
Argyrochosma fendleri (Kunze) Windham
  Fendler's falsecloak fern
Cheilanthes eatonii Baker
  Eaton's lipfern
Cheilanthes feei T. Moore
  slender lipfern
Cheilanthes fendleri Hook.
  Fendler's lipfern
Cheilanthes wootonii Maxon
  beaded lipfern
Cryptogramma acrostichoides R. Br.
  American rockbrake
Cryptogramma stelleri (Gmel.) Prantl
  fragile rockbrake
Notholaena standleyi Maxon
  star cloak fern
Pellaea atropurpurea (L.) Link
  purple cliffbrake
Pellaea breweri D.C. Eat.
  Brewer's cliffbrake
Pellaea glabella Mett. ex Kuhn
  dwarf cliffbrake
Pellaea glabella ssp. occidentalis (E. Nels.) Windham
  western dwarf cliffbrake
Pellaea glabella ssp. simplex (Butters) A.& D. Love
  smooth cliffbrake
Pellaea truncata Goodding
  spiny cliffbrake
Pellaea wrightiana Hook.
  Wright's cliffbrake

RANUNCULACEAE
Aconitum columbianum Nutt.
  Columbian monkshood
Aconitum columbianum var. columbianum Nutt.
  Columbian monkshood
Actaea arguta Nutt.
  = Actaea rubra ssp. arguta
Actaea rubra (Ait.) Willd.
  red baneberry
Actaea rubra ssp. arguta (Nutt.) Hulten
  red baneberry
Anemone canadensis L.
  Canadian anemone
Anemone cylindrica Gray
  candle anemone
Anemone ludoviciana Nutt.
  = Pulsatilla patens ssp. multifida
Anemone multifida Poir.
  Pacific anemone
Anemone multifida var. saxicola Boivin
  red windflower
Anemone narcissiflora L.
  narcissus anemone
Anemone narcissiflora ssp. zephyra (A. Nels.) Hulten
  zephyr anemone
Anemone parviflora Michx.
  smallflowered anemone
Anemone virginiana L.
  tall thimbleweed
Anemone virginiana var. riparia (Fern.) Boivin
  riparian thimbleweed
Aquilegia barnebyi Munz
  oil shale columbine
Aquilegia chrysantha Gray
  golden columbine
Aquilegia chrysantha var. rydbergii Munz
  Rydberg's golden columbine
Aquilegia coerulea James
  Colorado blue columbine
Aquilegia elegantula Greene
  western red columbine
Aquilegia micrantha Eastw.
  Mancos columbine
Aquilegia pubescens Coville
  Sierran columbine
Aquilegia saximontana Rydb.
  Rocky Mountain blue columbine
Caltha leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. leptosepala var. leptosepala DC.
  white marshmarigold
Ceratocephala testiculata (Crantz) Bess.
  curveseed butterwort
Clematis columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis columbiana var. columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis hirsutissima Pursh
  hairy clematis
Clematis hirsutissima var. hirsutissima Pursh
  hairy clematis
Clematis hirsutissima var. scottii (Porter) Erickson
  Scott's clematis
Clematis ligusticifolia Nutt.
  western white clematis
Clematis occidentalis (Hornem.) DC.
  western blue virginsbower
Clematis occidentalis var. occidentalis (Hornem.) DC.
  western blue virginsbower
Clematis orientalis L.
  oriental virginsbower
Delphinium X occidentale (S. Wats.) S. Wats.
  duncecap larkspur
Delphinium alpestre Rydb.
  Colorado larkspur
Delphinium barbeyi (Huth) Huth
  tall larkspur
Delphinium carolinianum Walt.
  Carolina larkspur
Delphinium nuttallianum Pritz. ex Walp.
  Nuttal's larkspur
Delphinium occidentale ssp. occidentale (S. Wats.) S. Wats.
  duncecap larkspur
Delphinium ramosum Rydb.
  mountain larkspur
Delphinium robustum Rydb.
  Wahatoya Creek larkspur
Delphinium scaposum Greene
  tall mountain larkspur
Delphinium wootonii Rydb.
  Organ Mountain larkspur
Myosurus apetalus var. montanus (Campbell) Whitemore
Myosurus cupulatus S. Wats.
  Arizona mousetail
Myosurus minimus ssp. minimus L.
  tiny mousetail
Pulsatilla hirsutissima (Pursh) Britt.
  = Pulsatilla patens ssp. multifida
Pulsatilla ludoviciana Heller
  = Pulsatilla patens ssp. multifida
Pulsatilla nuttalliana (DC.) Spreng.
  = Pulsatilla patens ssp. multifida
Pulsatilla patens (L.) P. Mill.
  American pasqueflower
Pulsatilla patens ssp. hirsutissima (Pursh) Zamels
  = Pulsatilla patens ssp. multifida
Pulsatilla patens ssp. multifida (Pritz.) Zamels
  cutleaf anemone
Ranunculus abortivus L.
  littleleaf buttercup
Ranunculus acriformis Gray
  sharpleaf buttercup
Ranunculus adoneus Gray
  alpine buttercup
Ranunculus alismifolius Geyer ex Benth.
  plantainleaf buttercup
Ranunculus alismifolius var. montanus S. Wats.
  waterplantain buttercup
Ranunculus cardiophyllus Hook.
  heartleaf buttercup
Ranunculus cymbalaria Pursh
  alkali buttercup
Ranunculus cymbalaria var. saximontanus Fern.
  Rocky Mountain buttercup
Ranunculus eschscholtzii Schlecht.
  Eschscholtz's buttercup
Ranunculus glaberrimus Hook.
  sagebrush buttercup
Ranunculus glaberrimus var. ellipticus (Greene) Greene
  elliptical buttercup
Ranunculus gmelinii DC.
  Gmelin's buttercup
Ranunculus gmelinii var. purshii (Richards.) Hara
  Pursh's buttercup
Ranunculus hyperboreus Rottb.
  high northern buttercup
Ranunculus hyperboreus var. hyperboreus Rottb.
  large nodding buttercup
Ranunculus inamoenus Greene
  graceful buttercup
Ranunculus jovis A. Nels.
  Utah buttercup
Ranunculus karelinii Czern.
  ice cold buttercup
Ranunculus longirostris Godr.
  longbeak buttercup
Ranunculus macauleyi Gray
  Rocky Mountain buttercup
Ranunculus macounii Britt.
  Macoun's buttercup
Ranunculus pedatifidus Sm.
  surefoot buttercup
Ranunculus pygmaeus Wahlenb.
  pygmy buttercup
Ranunculus ranunculinus (Nutt.) Rydb.
  tadpole buttercup
Ranunculus repens L.
  creeping buttercup
Ranunculus sceleratus L.
  celeryleaf buttercup
Ranunculus sceleratus var. sceleratus L.
  cursed buttercup
Ranunculus trichophyllus Chaix
  whitewater crowfoot
Ranunculus trichophyllus var. trichophyllus Chaix
  hairleaf water buttercup
Ranunculus uncinatus D. Don ex G. Don
  hooked buttercup
Ranunculus uncinatus var. earlei (Greene) L. Benson
  Earle's buttercup
Ranunculus uncinatus var. parviflorus (Torr.) L. Benson
  common Idaho buttercup
Thalictrum alpinum L.
  alpine meadowrue
Thalictrum dasycarpum Fisch. & Ave-Lall.
  purple meadowrue
Thalictrum fendleri Engelm. ex Gray
  Fendler's meadowrue
Thalictrum heliophilum Wilken & DeMott
  Cathedral Bluff meadowrue
Thalictrum revolutum DC.
  waxyleaf meadowrue
Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey.
  fewflower meadowrue
Thalictrum venulosum Trel.
  veiny meadowrue
Trautvetteria caroliniensis (Walt.) Vail
  Carolina bugbane
Trollius laxus Salisb.
  American globeflower
Trollius laxus ssp. albiflorus (Gray) A.& D. Love & Kapoor
  American globeflower

RESEDACEAE
Reseda lutea L.
  yellow mignonette
Reseda luteola L.
  weld

RHAMNACEAE
Ceanothus fendleri Gray
  Fendler's ceanothus
Ceanothus herbaceus Raf.
  Jersey tea
Ceanothus martinii M.E. Jones
  Martin's ceanothus
Ceanothus velutinus Dougl. ex Hook.
  snowbrush ceanothus
Frangula alnus P. Mill.
  buckthorn
Rhamnus cathartica L.
  common buckthorn
Rhamnus frangula L.
  = Frangula alnus
Rhamnus frangula var. angustifolia Loud.
  = Frangula alnus
Rhamnus smithii Greene
  Smith's buckthorn
Rhamnus smithii ssp. typica C.B. Wolf
  = Rhamnus smithii

ROSACEAE
Agrimonia striata Michx.
  roadside agrimony
Amelanchier Medik.
  serviceberry
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roemer
  Saskatoon serviceberry
Amelanchier utahensis Koehne
  Utah serviceberry
Argentina anserina (L.) Rydb.
  silverweed cinquefoil
Cercocarpus intricatus S. Wats.
  littleleaf mountain mahogany
Cercocarpus ledifolius Nutt.
  curlleaf mountain mahogany
Cercocarpus montanus Raf.
  true mountain mahogany
Chamaerhodos erecta (L.) Bunge
  little rose
Chamaerhodos erecta ssp. nuttallii (Pickering ex Rydb.) Hulten
  Nuttall's little rose
Coleogyne ramosissima Torr.
  blackbrush
Comarum palustre L.
  purple marshlocks
Crataegus chrysocarpa Ashe
  fireberry hawthorn
Crataegus columbiana var. chrysocarpa (Ashe) Dorn
  = Crataegus chrysocarpa
Crataegus douglasii var. rivularis (Nutt.) Sarg.
  = Crataegus rivularis
Crataegus erythropoda Ashe
  cerro hawthorn
Crataegus rivularis Nutt.
  river hawthorn
Crataegus saligna Greene
  willow hawthorn
Crataegus succulenta Schrad. ex Link
  fleshy hawthorn
Dryas octopetala L.
  white dryad
Dryas octopetala ssp. hookeriana (Juz.) Hulten
  Hooker's mountainavens
Fallugia paradoxa (D. Don) Endl. ex Torr.
  Apacheplume
Fragaria vesca L.
  woodland strawberry
Fragaria vesca ssp. bracteata (Heller) Staudt
  woodland strawberry
Fragaria virginiana Duchesne
  Virginia strawberry
Fragaria virginiana ssp. glauca (S. Wats.) Staudt
  Virginia strawberry
Geum aleppicum Jacq.
  yellow avens
Geum macrophyllum Willd.
  largeleaf avens
Geum macrophyllum var. perincisum (Rydb.) Raup
  largeleaf avens
Geum rossii (R. Br.) Ser.
  Ross' avens
Geum rossii var. turbinatum (Rydb.) C.L. Hitchc.
  Ross' avens
Geum triflorum Pursh
  prairiesmoke
Geum triflorum var. triflorum Pursh
  old man's whiskers
Holodiscus dumosus (Nutt. ex Hook.) Heller
  rockspirea
Ivesia gordonii (Hook.) Torr. & Gray
  Gordon's ivesia
Malus pumila P. Mill.
  cultivated apple
Pentaphylloides floribunda (Pursh) A. Love
  shrubby cinquefoil
Peraphyllum ramosissimum Nutt.
  squaw apple
Petrophyton caespitosum (Nutt.) Rydb.
  mat rockspirea
Physocarpus alternans (M.E. Jones) J.T. Howell
  dwarf ninebark
Physocarpus monogynus (Torr.) Coult.
  mountain ninebark
Physocarpus opulifolius (L.) Maxim.
  common ninebark
Potentilla ambigens Greene
  silkyleaf cinquefoil
Potentilla anglica Laicharding
  English cinquefoil
Potentilla argentea L.
  silver cinquefoil
Potentilla arguta Pursh
  tall cinquefoil
Potentilla arguta ssp. arguta Pursh
  tall cinquefoil
Potentilla biennis Greene
  biennial cinquefoil
Potentilla concinna Richards.
  elegant cinquefoil
Potentilla concinna var. bicrenata (Rydb.) Welsh & Johnston
  red cinquefoil
Potentilla concinna var. concinna Richards.
  red cinquefoil
Potentilla crinita Gray
  bearded cinquefoil
Potentilla diversifolia Lehm.
  varileaf cinquefoil
Potentilla effusa Dougl. ex Lehm.
  branched cinquefoil
Potentilla effusa var. rupincola (Osterhout) T. Wolf
  branched cinquefoil
Potentilla fissa Nutt.
  bigflower cinquefoil
Potentilla glandulosa Lindl.
  gland cinquefoil
Potentilla glandulosa ssp. glandulosa Lindl.
  sticky cinquefoil
Potentilla gracilis Dougl. ex Hook.
  northwest cinquefoil
Potentilla gracilis var. flabelliformis (Lehm.) Nutt. ex Torr. & Gray
Potentilla hippiana Lehm.
  woolly cinquefoil
Potentilla hookeriana Lehm.
  Hooker's cinquefoil
Potentilla nivea L.
  snow cinquefoil
Potentilla norvegica L.
  Norwegian cinquefoil
Potentilla ovina Macoun
  sheep cinquefoil
Potentilla paradoxa Nutt.
  Paradox cinquefoil
Potentilla pensylvanica L.
  Pennsylvania cinquefoil
Potentilla plattensis Nutt.
  Platte River cinquefoil
Potentilla pulcherrima Lehm.
  beautiful cinquefoil
Potentilla recta L.
  sulphur cinquefoil
Potentilla rivalis Nutt.
  brook cinquefoil
Potentilla rubricaulis Lehm.
  Rocky Mountain cinquefoil
Potentilla sibbaldii Haller f.
  = Sibbaldia procumbens
Potentilla subjuga Rydb.
  Colorado cinquefoil
Potentilla subviscosa Greene
  Navajo cinquefoil
Potentilla uniflora Ledeb.
  oneflower cinquefoil
Potentilla yukonensis Hulten
  = Argentina anserina
Prunus americana Marsh.
  American plum
Prunus angustifolia Marsh.
  Chickasaw plum
Prunus gracilis Engelm. & Gray
  Oklahoma plum
Prunus rivularis Scheele
  creek plum
Prunus virginiana L.
  common chokecherry
Prunus virginiana var. melanocarpa (A. Nels.) Sarg.
  black chokecherry
Purshia mexicana var. stansburiana (Torr.) Welsh
  = Purshia stansburiana
Purshia stansburiana (Torr.) Henrickson
  Stansbury cliffrose
Purshia tridentata (Pursh) DC.
  antelope bitterbrush
Rosa acicularis Lindl.
  prickly rose
Rosa acicularis ssp. sayi (Schwein.) W.H. Lewis
  prickly rose
Rosa arkansana Porter
  prairie rose
Rosa woodsii Lindl.
  Woods' rose
Rubus arcticus L.
  arctic blackberry
Rubus arcticus ssp. acaulis (Michx.) Focke
  dwarf raspberry
Rubus deliciosus Torr.
  delicious raspberry
Rubus idaeus L.
  American red raspberry
Rubus idaeus ssp. strigosus (Michx.) Focke
  grayleaf red raspberry
Rubus laciniatus Willd.
  cutleaf blackberry
Rubus occidentalis L.
  black raspberry
Rubus parviflorus Nutt.
  thimbleberry
Rubus parviflorus var. parviflorus Nutt.
  western thimbleberry
Rubus pubescens Raf.
  dwarf red blackberry
Rubus pubescens var. pubescens Raf.
  dwarf red blackberry
Rubus strigosus Michx.
  = Rubus idaeus ssp. strigosus
Sanguisorba minor Scop.
  small burnet
Sibbaldia procumbens L.
  creeping sibbaldia
Sorbus scopulina Greene
  Greene mountainash
Spiraea douglasii Hook.
  Douglas' spirea
Spiraea douglasii var. menziesii (Hook.) K. Presl
  Menzies' spirea

RUBIACEAE
Galium aparine L.
  stickywilly
Galium bifolium S. Wats.
  twinleaf bedstraw
Galium boreale L.
  northern bedstraw
Galium coloradoense W. Wight
  Colorado bedstraw
Galium mexicanum Kunth
  Mexican bedstraw
Galium mexicanum ssp. asperrimum (Gray) Dempster
  Mexican bedstraw
Galium odoratum (L.) Scop.
  sweetscented bedstraw
Galium spurium L.
  Marin County bedstraw
Galium trifidum L.
  threepetal bedstraw
Galium trifidum ssp. subbiflorum (Wieg.) Piper
  threepetal bedstraw
Galium triflorum Michx.
  fragrant bedstraw
Galium verum L.
  Yellow Spring bedstraw
Hedyotis nigricans (Lam.) Fosberg
  diamondflowers

RUTACEAE
Ptelea trifoliata L.
  common hoptree
Thamnosma texana (Gray) Torr.
  rue of the mountains

SALICACEAE
Populus X acuminata Rydb. (pro sp.)
  lanceleaf cottonwood
Populus angustifolia James
  narrowleaf cottonwood
Populus balsamifera L.
  balsam poplar
Populus deltoides Bartr. ex Marsh.
  eastern cottonwood
Populus deltoides ssp. monilifera (Ait.) Eckenwalder
  plains cottonwood
Populus deltoides ssp. wislizeni (S. Wats.) Eckenwalder
  Rio Grande cottonwood
Populus texana Sarg.
Populus tremuloides Michx.
  quaking aspen
Salix alba L.
  white willow
Salix alba var. vitellina (L.) Stokes
  golden willow
Salix amygdaloides Anderss.
  peachleaf willow
Salix arctica R. Br. ex Richards.
Salix babylonica L.
  weeping willow
Salix bebbiana Sarg.
  Bebb willow
Salix boothii Dorn
  Booth's willow
Salix brachycarpa Nutt.
  barrenground willow
Salix candida Fluegge ex Willd.
  sageleaf willow
Salix drummondiana Barratt ex Hook.
  Drummond's willow
Salix exigua Nutt.
  sandbar willow
Salix fragilis L.
  crack willow
Salix geyeriana Anderss.
  Geyer's willow
Salix irrorata Anderss.
  sandbar willow
Salix lanata L.
  woolly willow
Salix lanata ssp. calcicola (Fern. & Wieg.) Hulten
  woolly willow
Salix lucida Muhl.
  shining willow
Salix lucida ssp. caudata (Nutt.) E. Murr.
  greenleaf willow
Salix lucida ssp. lasiandra (Benth.) E. Murr.
  Pacific willow
Salix lutea Nutt.
  yellow willow
Salix matsudana Koidzumi
  corkscrew willow
Salix monticola Bebb
  park willow
Salix myrtillifolia Anderss.
  blueberry willow
Salix novae-angliae auct. non Anderss.
  = Salix boothii
Salix planifolia Pursh
  diamondleaf willow
Salix purpurea L.
  purpleosier willow
Salix reticulata L.
  netleaf willow
Salix reticulata ssp. nivalis (Hook.) A.& D. Love & Kapoor
  snow willow
Salix scouleriana Barratt ex Hook.
  Scouler's willow
Salix serissima (Bailey) Fern.
  autumn willow
Salix wolfii Bebb
  Wolf's willow

SANTALACEAE
Comandra pallida A. DC.
  = Comandra umbellata ssp. pallida
Comandra umbellata (L.) Nutt.
  bastard toadflax
Comandra umbellata ssp. pallida (A. DC.) Piehl
  pale bastard toadflax

SAPINDACEAE
Sapindus drummondii Hook. & Arn.
  = Sapindus saponaria var. drummondii
Sapindus saponaria L.
  wingleaf soapberry
Sapindus saponaria var. drummondii (Hook. & Arn.) L. Benson
  western soapberry

SAURURACEAE
Anemopsis californica (Nutt.) Hook. & Arn.
  yerba mansa

SAXIFRAGACEAE
Boykinia jamesii (Torr.) Engl.
  James' telesonix
Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fries
  northern golden saxifrage
Conimitella williamsii (D.C. Eat.) Rydb.
  Williams' miterwort
Heuchera bracteata (Torr.) Ser.
  bracted alumroot
Heuchera hallii Gray
  Front Range alumroot
Heuchera parvifolia Nutt. ex Torr. & Gray
  littleleaf alumroot
Heuchera parvifolia var. nivalis (Rosendahl, Butters & Lakela) A.& D. Love & Kapoor
  littleleaf alumroot
Heuchera parvifolia var. parvifolia Nutt. ex Torr. & Gray
  littleleaf alumroot
Heuchera richardsonii R. Br.
  Richardson's alumroot
Heuchera rubescens Torr.
  pink alumroot
Heuchera rubescens var. versicolor (Greene) M.G. Stewart
  pink alumroot
Lithophragma glabrum Nutt.
  bulbous woodlandstar
Lithophragma parviflorum (Hook.) Nutt. ex Torr. & Gray
  smallflower woodlandstar
Lithophragma tenellum Nutt.
  slender woodlandstar
Mitella pentandra Hook.
  fivestamen miterwort
Mitella stauropetala Piper
  smallflower miterwort
Mitella stauropetala var. stenopetala (Piper) Rosendahl
  drywoods miterwort
Parnassia fimbriata Koenig
  Rocky Mountain parnassia
Parnassia kotzebuei Cham. ex Spreng.
  Kotzebue's grass of Parnassus
Parnassia parviflora DC.
  smallflower grass of Parnassus
Saxifraga adscendens L.
  wedgeleaf saxifrage
Saxifraga adscendens ssp. oregonensis (Raf.) Bacig.
  small saxifrage
Saxifraga bronchialis L.
  yellowdot saxifrage
Saxifraga bronchialis ssp. austromontana (Wieg.) Piper
  matted saxifrage
Saxifraga cernua L.
  nodding saxifrage
Saxifraga cespitosa L.
  tufted alpine saxifrage
Saxifraga cespitosa ssp. delicatula (Small) Porsild
  tufted alpine saxifrage
Saxifraga cespitosa ssp. monticola (Small) Porsild
  tufted alpine saxifrage
Saxifraga chrysantha Gray
  goldbloom saxifrage
Saxifraga flagellaris Willd. ex Sternb.
  whiplash saxifrage
Saxifraga flagellaris ssp. crandallii (Gandog.) Hulten
  Crandall's saxifrage
Saxifraga foliolosa R. Br.
  leafystem saxifrage
Saxifraga hirculus L.
  yellow marsh saxifrage
Saxifraga hirculus ssp. propinqua (R. Br.) A.& D. Love
  yellow marsh saxifrage
Saxifraga odontoloma Piper
  brook saxifrage
Saxifraga oregana T.J. Howell
  Oregon saxifrage
Saxifraga rhomboidea Greene
  diamondleaf saxifrage
Saxifraga rivularis L.
  weak saxifrage
Sullivantia hapemanii (Coult. & Fisher) Coult.
  Hapeman's coolwort
Sullivantia hapemanii var. purpusii (Brand) Soltis
  Purpus' sullivantia

SCROPHULARIACEAE
Agalinis tenuifolia (Vahl) Raf.
  slenderleaf false foxglove
Bacopa rotundifolia (Michx.) Wettst.
  disk waterhyssop
Besseya alpina (Gray) Rydb.
  alpine besseya
Besseya plantaginea (James) Rydb.
  White River coraldrops
Besseya ritteriana (Eastw.) Rydb.
  Ritter's coraldrops
Besseya wyomingensis (A. Nels.) Rydb.
  Wyoming besseya
Castilleja applegatei Fern.
  wavyleaf Indian paintbrush
Castilleja applegatei ssp. martinii (Abrams) Chuang & Heckard
Castilleja flava S. Wats.
  yellow Indian paintbrush
Castilleja haydenii (Gray) Cockerell
  Hayden's Indian paintbrush
Castilleja integra Gray
  wholeleaf Indian paintbrush
Castilleja linariifolia Benth.
  Wyoming Indian paintbrush
Castilleja lineata Greene
  marshmeadow Indian paintbrush
Castilleja miniata Dougl. ex Hook.
  scarlet Indian paintbrush
Castilleja minor (Gray) Gray
  lesser Indian paintbrush
Castilleja occidentalis Torr.
  western Indian paintbrush
Castilleja puberula Rydb.
  shortflower Indian paintbrush
Castilleja rhexiifolia Rydb.
  splitleaf Indian paintbrush
Castilleja scabrida Eastw.
  rough Indian paintbrush
Castilleja sessiliflora Pursh
  downy paintedcup
Castilleja sulphurea Rydb.
  sulphur Indian paintbrush
Chaenorrhinum minus (L.) Lange
  dwarf snapdragon
Chionophila jamesii Benth.
  Rocky Mountain snowlover
Collinsia parviflora Lindl.
  smallflower blue eyed Mary
Cordylanthus ramosus Nutt. ex Benth.
  bushy bird's beak
Cordylanthus wrightii Gray
  Wright's bird's beak
Digitalis purpurea L.
  purple foxglove
Gratiola neglecta Torr.
  clammy hedgehyssop
Limosella aquatica L.
  water mudwort
Linaria canadensis var. texana (Scheele) Pennell
  = Nuttallanthus texanus
Linaria dalmatica (L.) P. Mill.
  Dalmatian toadflax
Linaria dalmatica ssp. dalmatica (L.) P. Mill.
  Dalmatian toadflax
Linaria texana Scheele
  = Nuttallanthus texanus
Linaria vulgaris P. Mill.
  butter and eggs
Lindernia dubia (L.) Pennell
  moistbank pimpernel
Lindernia dubia var. anagallidea (Michx.) Cooperrider
  yellowseed false pimpernel
Mimulus breweri (Greene) Coville
  Brewer's monkeyflower
Mimulus cardinalis Eastw., non Dougl. ex Benth.
  = Mimulus eastwoodiae
Mimulus eastwoodiae Rydb.
  Eastwood's monkeyflower
Mimulus floribundus Lindl.
  manyflowered monkeyflower
Mimulus gemmiparus W.A. Weber
  Rocky Mountain monkeyflower
Mimulus glabratus Kunth
  roundleaf monkeyflower
Mimulus glabratus var. glabratus Kunth
  roundleaf monkeyflower
Mimulus guttatus DC.
  seep monkeyflower
Mimulus lewisii Pursh
  purple monkeyflower
Mimulus moschatus Dougl. ex Lindl.
  musk monkeyflower
Mimulus ringens L.
  ringen monkeyflower
Mimulus rubellus Gray
  red monkeyflower
Mimulus tilingii Regel
  Tiling's monkeyflower
Nuttallanthus texanus (Scheele) D.A. Sutton
  Texas toadflax
Orthocarpus luteus Nutt.
  yellow owlclover
Orthocarpus purpureoalbus Gray ex S. Wats.
  purplewhite owlclover
Pedicularis bracteosa Benth.
  bracted lousewort
Pedicularis bracteosa var. paysoniana (Pennell) Cronq.
  Payson's lousewort
Pedicularis canadensis L.
  Canadian lousewort
Pedicularis canadensis ssp. fluviatilis (Heller) W.A. Weber
  Canadian lousewort
Pedicularis centranthera Gray
  dwarf lousewort
Pedicularis crenulata Benth.
  meadow lousewort
Pedicularis groenlandica Retz.
  elephanthead lousewort
Pedicularis parryi Gray
  Parry's lousewort
Pedicularis parryi ssp. mogollonica (Greene) G.D. Carr
  Mogollon lousewort
Pedicularis parryi ssp. parryi Gray
  Parry's lousewort
Pedicularis procera Gray
  giant lousewort
Pedicularis racemosa Dougl. ex Benth.
  sickletop lousewort
Pedicularis racemosa ssp. alba Pennell
  sickletop lousewort
Pedicularis sudetica Willd.
  sudetic lousewort
Pedicularis sudetica ssp. scopulorum (Gray) Hulten
  sudetic lousewort
Penstemon albidus Nutt.
  white penstemon
Penstemon ambiguus Torr.
  gilia beardtongue
Penstemon angustifolius Nutt. ex Pursh
  broadbeard beardtongue
Penstemon angustifolius var. angustifolius Nutt. ex Pursh
  broadbeard beardtongue
Penstemon angustifolius var. vernalensis N. Holmgren
  broadbeard beardtongue
Penstemon arenicola A. Nels.
  sand penstemon
Penstemon auriberbis Pennell
  Colorado beardtongue
Penstemon barbatus (Cav.) Roth
  beardlip penstemon
Penstemon barbatus ssp. torreyi (Benth.) Keck
  Torrey's penstemon
Penstemon barbatus ssp. trichander (Gray) Keck
  beardlip penstemon
Penstemon breviculus (Keck) Nisbet & R.C. Jackson
  shortstem beardtongue
Penstemon buckleyi Pennell
  Buckley's beardtongue
Penstemon caespitosus Nutt. ex Gray
  mat penstemon
Penstemon cobaea Nutt.
  cobaea beardtongue
Penstemon comarrhenus Gray
  dusty beardtongue
Penstemon crandallii A. Nels.
  Crandall's beardtongue
Penstemon crandallii ssp. atratus Keck
  Crandall's beardtongue
Penstemon crandallii ssp. crandallii A. Nels.
  Crandall's beardtongue
Penstemon cyanocaulis Payson
  bluestem beardtongue
Penstemon cyathophorus Rydb.
  sagebrush beardtongue
Penstemon debilis O'Kane & J. Anderson
  Parachute beardtongue
Penstemon degeneri Crosswhite
  Degener's beardtongue
Penstemon eatonii Gray
  Eaton's penstemon
Penstemon eatonii ssp. eatonii Gray
  Eaton's penstemon
Penstemon eatonii ssp. undosus (M.E. Jones) Keck
  Eaton's penstemon
Penstemon eriantherus Pursh
  fuzzytongue penstemon
Penstemon fremontii Torr. & Gray ex Gray
  Fremont's beardtongue
Penstemon fremontii var. fremontii Torr. & Gray ex Gray
  Fremont's penstemon
Penstemon fremontii var. glabrescens Dorn & Lichvar
  Fremont's penstemon
Penstemon gibbensii Dorn
  Gibbens' beardtongue
Penstemon glaber Pursh
  sawsepal penstemon
Penstemon glaber var. brandegei (Porter) Freeman
  Brandegee's penstemon
Penstemon glaber var. glaber Pursh
  western smooth beardtongue
Penstemon gracilis Nutt.
  lilac penstemon
Penstemon grahamii Keck
  Uinta Basin beardtongue
Penstemon grandiflorus Nutt.
  large beardtongue
Penstemon griffinii A. Nels.
  Griffin's beardtongue
Penstemon hallii Gray
  Hall's beardtongue
Penstemon harbourii Gray
  Harbour's beardtongue
Penstemon harringtonii Penl.
  Harrington's beardtongue
Penstemon humilis Nutt. ex Gray
  low penstemon
Penstemon jamesii Benth.
  James' beardtongue
Penstemon laricifolius Hook. & Arn.
  larchleaf beardtongue
Penstemon laricifolius ssp. exilifolius (A. Nels.) Keck
  larchleaf beardtongue
Penstemon lentus Pennell
  handsome beardtongue
Penstemon linarioides Gray
  toadflax penstemon
Penstemon mensarum Pennell
  tiger beardtongue
Penstemon moffatii Eastw.
  Moffatt's beardtongue
Penstemon ophianthus Pennell
  coiled anther penstemon
Penstemon osterhoutii Pennell
  Osterhout's beardtongue
Penstemon pachyphyllus Gray ex Rydb.
  thickleaf beardtongue
Penstemon pachyphyllus var. mucronatus (N. Holmgren) Neese
  mucronate penstemon
Penstemon parviflorus Pennell
  Montezuma County beardtongue
Penstemon penlandii W.A. Weber
  Penland's beardtongue
Penstemon procerus Dougl. ex Graham
  littleflower penstemon
Penstemon procerus var. procerus Dougl. ex Graham
  pincushion beardtongue
Penstemon radicosus A. Nels.
  matroot penstemon
Penstemon retrorsus Payson ex Pennell
  Adobe Hills beardtongue
Penstemon rostriflorus Kellogg
  Bridge penstemon
Penstemon rydbergii A. Nels.
  Rydberg's penstemon
Penstemon saxosorum Pennell
  upland beardtongue
Penstemon scariosus Pennell
  White River beardtongue
Penstemon scariosus var. albifluvis (England) N. Holmgren
  White River beardtongue
Penstemon scariosus var. cyanomontanus Neese
  red mountains beardtongue
Penstemon secundiflorus Benth.
  sidebells penstemon
Penstemon strictus Benth.
  Rocky Mountain penstemon
Penstemon teucrioides Greene
  germander beardtongue
Penstemon unilateralis Rydb.
  oneside penstemon
Penstemon utahensis Eastw.
  Utah penstemon
Penstemon virens Pennell ex Rydb.
  Front Range beardtongue
Penstemon watsonii Gray
  Watson's penstemon
Penstemon whippleanus Gray
  Whipple's penstemon
Penstemon yampaensis Penl.
  Yampa beardtongue
Rhinanthus minor L.
  little yellowrattle
Rhinanthus minor ssp. groenlandicus (Ostenf.) L. Neum.
  arctic rattlebox
Scrophularia lanceolata Pursh
  lanceleaf figwort
Verbascum X pterocaulon Franch.
  mullein
Verbascum blattaria L.
  moth mullein
Verbascum phlomoides L.
  orange mullein
Verbascum thapsus L.
  common mullein
Veronica americana Schwein. ex Benth.
  American speedwell
Veronica anagallis-aquatica L.
  water speedwell
Veronica biloba L.
  twolobe speedwell
Veronica peregrina L.
  neckweed
Veronica peregrina ssp. xalapensis (Kunth) Pennell
  hairy purslane speedwell
Veronica persica Poir.
  birdeye speedwell
Veronica persica var. persica Poir.
  birdeye speedwell
Veronica polita Fries
  gray field speedwell
Veronica scutellata L.
  skullcap speedwell
Veronica serpyllifolia L.
  thymeleaf speedwell
Veronica serpyllifolia ssp. humifusa (Dickson) Syme
  brightblue speedwell
Veronica wormskjoldii Roemer & J.A. Schultes
  American alpine speedwell

SELAGINELLACEAE
Selaginella densa Rydb.
  lesser spikemoss
Selaginella mutica D.C. Eat. ex Underwood
  bluntleaf spikemoss
Selaginella selaginoides (L.) Beauv. ex Mart. & Schrank
  club spikemoss
Selaginella underwoodii Hieron.
  Underwood's spikemoss
Selaginella weatherbiana R. Tryon
  Rocky Mountain spikemoss

SIMAROUBACEAE
Ailanthus altissima (P. Mill.) Swingle
  tree of heaven

SMILACACEAE
Smilax herbacea var. lasioneura (Hook.) A. DC.
  = Smilax lasioneura
Smilax lasioneura Hook.
  Blue Ridge carrionflower

SOLANACEAE
Chamaesaracha coniodes (Moric. ex Dunal) Britt.
  gray five eyes
Chamaesaracha coronopus (Dunal) Gray
  greenleaf five eyes
Datura meteloides DC. ex Dunal
  = Datura wrightii
Datura stramonium L.
  jimsonweed
Datura tatula L.
  = Datura stramonium
Datura wrightii Regel
  sacred thornapple
Hyoscyamus niger L.
  black henbane
Lycium barbarum L.
  matrimonyvine
Lycium pallidum Miers
  pale wolfberry
Nicandra physalodes (L.) Gaertn.
  apple of Peru
Nicotiana attenuata Torr. ex S. Wats.
  coyote tobacco
Physalis fendleri Gray
  = Physalis hederifolia var. fendleri
Physalis hederifolia Gray
  ivyleaf groundcherry
Physalis hederifolia var. comata (Rydb.) Waterfall
  ivyleaf groundcherry
Physalis hederifolia var. fendleri (Gray) Cronq.
  Fendler's groundcherry
Physalis heterophylla Nees
  clammy groundcherry
Physalis hispida (Waterfall) Cronq.
  prairie groundcherry
Physalis lobata Torr.
  = Quincula lobata
Physalis pruinosa L.
  strawberry tomato
Physalis subulata Rydb.
  Chihuahuan groundcherry
Physalis subulata var. neomexicana (Rydb.) Waterfall ex Kartesz & Gandhi
  New Mexican groundcherry
Physalis virginiana P. Mill.
  Virginia groundcherry
Quincula lobata (Torr.) Raf.
  Chinese lantern
Solanum americanum P. Mill.
  American black nightshade
Solanum carolinense L.
  Carolina horsenettle
Solanum dulcamara L.
  climbing nightshade
Solanum elaeagnifolium Cav.
  silverleaf nightshade
Solanum heterodoxum Dunal
  melonleaf nightshade
Solanum jamesii Torr.
  wild potato
Solanum nigrum var. americanum (P. Mill.) O.E. Schulz
  = Solanum americanum
Solanum physalifolium Rusby
  hoe nightshade
Solanum rostratum Dunal
  buffalobur nightshade
Solanum triflorum Nutt.
  cutleaf nightshade

TAMARICACEAE
Tamarix parviflora DC.
  smallflower tamarisk
Tamarix ramosissima Ledeb.
  saltcedar

TYPHACEAE
Typha angustifolia L.
  narrowleaf cattail
Typha domingensis Pers.
  southern cattail
Typha latifolia L.
  broadleaf cattail

ULMACEAE
Celtis douglasii Planch.
  = Celtis laevigata var. reticulata
Celtis laevigata Willd.
  sugarberry
Celtis laevigata var. reticulata (Torr.) L. Benson
  netleaf hackberry
Celtis occidentalis var. reticulata (Torr.) Sarg.
  = Celtis laevigata var. reticulata
Celtis reticulata Torr.
  = Celtis laevigata var. reticulata
Ulmus pumila L.
  Siberian elm

UMBELLIFERAE
Aletes acaulis (Torr.) Coult. & Rose
  stemless Indian parsley
Aletes anisatus (Gray) Theobald & Tseng
  Rocky Mountain Indian parsley
Aletes humilis Coult. & Rose
  Colorado aletes
Aletes macdougalii Coult. & Rose
  MacDougal's aletes
Aletes macdougalii ssp. breviradiatus Theobald & Tseng
  MacDougal's Indian parsley
Aletes petraea (M.E. Jones) W.A. Weber
  = Pteryxia petraea
Aletes sessiliflorus Theobald & Tseng
  sessileflower Indian parsley
Angelica ampla A. Nels.
  giant angelica
Angelica grayi (Coult. & Rose) Coult. & Rose
  Gray's angelica
Angelica pinnata S. Wats.
  smallleaf angelica
Berula erecta (Huds.) Coville
  cutleaf waterparsnip
Bupleurum americanum Coult. & Rose
  American thorow wax
Carum carvi L.
  caraway
Cicuta douglasii (DC.) Coult. & Rose
  western water hemlock
Cicuta maculata var. californica (Gray) Boivin
  = Cicuta douglasii
Conioselinum scopulorum (Gray) Coult. & Rose
  Rocky Mountain hemlockparsley
Conium maculatum L.
  poison hemlock
Cymopterus acaulis (Pursh) Raf.
  plains springparsley
Cymopterus acaulis var. fendleri (Gray) Goodrich
  chimaja
Cymopterus bulbosus A. Nels.
  bulbous springparsley
Cymopterus duchesnensis M.E. Jones
  Uinta Basin springparsley
Cymopterus fendleri Gray
  = Cymopterus acaulis var. fendleri
Cymopterus montanus Nutt. ex Torr. & Gray
  mountain springparsley
Cymopterus planosus (Osterhout) Mathias
  Rocky Mountain springparsley
Cymopterus purpurascens (Gray) M.E. Jones
  widewing springparsley
Cymopterus purpureus S. Wats.
  purple springparsley
Cymopterus terebinthinus var. petraeus (M.E. Jones) Goodrich
  = Pteryxia petraea
Daucus carota L.
  Queen Anne's lace
Eryngium planum L.
  plains eryngo
Harbouria trachypleura (Gray) Coult. & Rose
  whiskbroom parsley
Leptotaenia multifida Nutt.
  = Lomatium dissectum var. multifidum
Levisticum officinale W.D.J. Koch
  garden lovage
Ligusticum filicinum var. tenuifolium (S. Wats.) Mathias & Constance
  = Ligusticum tenuifolium
Ligusticum porteri Coult. & Rose
  Porter's licoriceroot
Ligusticum tenuifolium S. Wats.
  Idaho licoriceroot
Lomatium bicolor (S. Wats.) Coult. & Rose
  Wasatch desertparsley
Lomatium bicolor var. leptocarpum (Torr. & Gray) Schlessman
  Wasatch desertparsley
Lomatium concinnum (Osterhout) Mathias
  adobe desertparsley
Lomatium dissectum (Nutt.) Mathias & Constance
  fernleaf buscuitroot
Lomatium dissectum var. multifidum (Nutt.) Mathias & Constance
  carrotleaf biscuitroot
Lomatium eastwoodiae (Coult. & Rose) J.F. Macbr.
  Eastwood's desertparsley
Lomatium foeniculaceum (Nutt.) Coult. & Rose
  desert biscuitroot
Lomatium foeniculaceum ssp. foeniculaceum (Nutt.) Coult. & Rose
  desert biscuitroot
Lomatium foeniculaceum ssp. macdougalii (Coult. & Rose) Theobald
  Macdougal's biscuitroot
Lomatium grayi (Coult. & Rose) Coult. & Rose
  Gray's biscuitroot
Lomatium juniperinum (M.E. Jones) Coult. & Rose
  juniper biscuitroot
Lomatium leptocarpum (Torr. & Gray) Coult. & Rose
  = Lomatium bicolor var. leptocarpum
Lomatium macrocarpum (Nutt. ex Torr. & Gray) Coult. & Rose
  bigseed biscuitroot
Lomatium nuttallii (Gray) J.F. Macbr.
  Nuttall's biscuitroot
Lomatium orientale Coult. & Rose
  Northern Idaho biscuitroot
Lomatium simplex (Nutt.) J.F. Macbr.
  narrowleaf lomatium
Lomatium simplex var. simplex (Nutt.) J.F. Macbr.
  Great Basin desertparsley
Musineon divaricatum (Pursh) Raf.
  leafy wildparsley
Musineon divaricatum var. divaricatum (Pursh) Raf.
  leafy wildparsley
Musineon divaricatum var. hookeri (Torr. & Gray) Mathias
  Hooker's wildparsley
Neoparrya lithophila Mathias
  Bill's neoparrya
Oreoxis alpina (Gray) Coult. & Rose
  alpine oreoxis
Oreoxis alpina ssp. alpina (Gray) Coult. & Rose
  alpine oreoxis
Oreoxis alpina ssp. puberulenta W.A. Weber
  alpine oreoxis
Oreoxis bakeri Coult. & Rose
  Baker's alpineparsley
Oreoxis humilis Raf.
  Rocky Mountain alpineparsley
Orogenia linearifolia S. Wats.
  Great Basin Indian potato
Osmorhiza chilensis var. cupressimontana (Boivin) Boivin
  = Osmorhiza depauperata
Osmorhiza depauperata Phil.
  bluntseed sweetroot
Osmorhiza longistylis (Torr.) DC.
  longstyle sweetroot
Osmorhiza occidentalis (Nutt. ex Torr. & Gray) Torr.
  western sweetroot
Oxypolis fendleri (Gray) Heller
  Fendler's cowbane
Pastinaca sativa L.
  wild parsnip
Perideridia gairdneri (Hook. & Arn.) Mathias
  yampa
Perideridia gairdneri ssp. borealis Chuang & Constance
  common yampah
Podistera eastwoodiae (Coult. & Rose) Mathias & Constance
  Eastwood's podistera
Pseudocymopterus Coult. & Rose
  false springparsley
Pseudocymopterus montanus (Gray) Coult. & Rose
  alpine false springparsley
Pteryxia petraea (M.E. Jones) Coult. & Rose
  rockloving desertparsley
Sanicula marilandica L.
  Maryland sanicle
Sium suave Walt.
  hemlock waterparsnip
Zizia aptera (Gray) Fern.
  meadow zizia

URTICACEAE
Parietaria pensylvanica Muhl. ex Willd.
  Pennsylvania pellitory
Urtica californica Greene
  = Urtica dioica ssp. gracilis
Urtica dioica L.
  stinging nettle
Urtica dioica ssp. gracilis (Ait.) Seland.
  California nettle
Urtica dioica ssp. holosericea (Nutt.) Thorne
  stinging nettle
Urtica gracilis Ait.
  = Urtica dioica ssp. gracilis
Urtica lyallii S. Wats.
  = Urtica dioica ssp. gracilis

VALERIANACEAE
Valeriana acutiloba Rydb.
  sharpleaf valerian
Valeriana acutiloba var. acutiloba Rydb.
  sharpleaf valerian
Valeriana arizonica Gray
  Arizona valerian
Valeriana capitata ssp. acutiloba (Rydb.) F.G. Mey.
  = Valeriana acutiloba var. acutiloba
Valeriana edulis Nutt. ex Torr. & Gray
  edible valerian
Valeriana occidentalis Heller
  western valerian
Valeriana ovata Rydb.
  = Valeriana arizonica

VERBENACEAE
Caryopteris X clandonensis hort. ex Rehd.
  caryopteris
Glandularia bipinnatifida (Nutt.) Nutt.
  Dakota mock vervain
Lippia lanceolata Michx.
  = Phyla lanceolata
Phyla cuneifolia (Torr.) Greene
  fogfruit
Phyla lanceolata (Michx.) Greene
  lanceleaf fogfruit
Verbena bracteata Lag. & Rodr.
  bigbract verbena
Verbena hastata L.
  swamp verbena
Verbena macdougalii Heller
  MacDougal verbena
Verbena plicata Greene
  fanleaf vervain
Verbena stricta Vent.
  hoary verbena

VIOLACEAE
Hybanthus verticillatus (Ortega) Baill.
  babyslippers
Viola adunca Sm.
  hookedspur violet
Viola affinis Le Conte
  sand violet
Viola bicolor Pursh
  field pansy
Viola biflora L.
  twoflower violet
Viola labradorica Schrank
  alpine violet
Viola macloskeyi Lloyd
  small white violet
Viola macloskeyi ssp. pallens (Banks ex DC.) M.S. Baker
  smooth white violet
Viola nuttallii Pursh
  Nuttall's violet
Viola odorata L.
  sweet violet
Viola pedatifida G. Don
  prairie violet
Viola praemorsa Dougl. ex Lindl.
  canary violet
Viola praemorsa ssp. linguifolia (Nutt.) M.S. Baker & J.C. Clausen ex M.E. Peck
  upland yellow violet
Viola purpurea Kellogg
  goosefoot violet
Viola purpurea ssp. venosa (S. Wats.) M.S. Baker & J.C. Clausen
  goosefoot yellow violet
Viola selkirkii Pursh ex Goldie
  Selkirk's violet
Viola sheltonii Torr.
  Shelton's violet
Viola utahensis M.S. Baker & J.C. Clausen ex Baker
  Utah violet
Viola vallicola A. Nels.
  valley violet
Viola vallicola var. major (Hook.) Fabijan
  valley violet

VISCACEAE
Arceuthobium americanum Nutt. ex Engelm.
  American dwarf mistletoe
Arceuthobium cyanocarpum (A. Nels. ex Rydb.) A. Nels.
  limber pine dwarf mistletoe
Arceuthobium divaricatum Engelm.
  pinyon dwarf mistletoe
Arceuthobium douglasii Engelm.
  Douglas fir dwarf mistletoe
Arceuthobium vaginatum (Willd.) J. Presl
  pineland dwarf mistletoe
Arceuthobium vaginatum ssp. cryptopodum (Engelm.) Hawksworth & Wiens
  pineland dwarf mistletoe
Phoradendron juniperinum Engelm.
  juniper mistletoe

VITACEAE
Ampelopsis quinquefolia (L.) Michx.
  = Parthenocissus quinquefolia var. quinquefolia
Parthenocissus inserta (Kerner) Fritsch
  = Parthenocissus quinquefolia var. quinquefolia
Parthenocissus quinquefolia (L.) Planch.
  Virginia creeper
Parthenocissus quinquefolia var. quinquefolia (L.) Planch.
  Virginia creeper
Vitis acerifolia Raf.
  mapleleaf grape
Vitis riparia Michx.
  riverbank grape

ZANNICHELLIACEAE
Zannichellia palustris L.
  horned pondweed

ZYGOPHYLLACEAE
Kallstroemia parviflora J.B.S. Norton
  warty caltrop
Tribulus terrestris L.
  puncturevine