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

ACERACEAE
Acer glabrum Torr.
  Rocky Mountain maple
Acer glabrum var. douglasii (Hook.) Dippel
  Douglas maple
Acer glabrum var. glabrum Torr.
  Rocky Mountain maple
Acer grandidentatum Nutt.
  bigtooth maple
Acer grandidentatum var. grandidentatum Nutt.
  bigtooth maple
Acer negundo L.
  boxelder
Acer negundo var. interius (Britt.) Sarg.
  boxelder maple

ACORACEAE
Acorus americanus (Raf.) Raf.
  sweetflag
Acorus calamus auct. non L.
  = Acorus americanus

ADOXACEAE
Adoxa moschatellina L.
  muskroot

AGAVACEAE
Yucca glauca Nutt.
  small soapweed
Yucca glauca var. glauca Nutt.
  soapweed yucca

ALISMATACEAE
Alisma gramineum Lej.
  narrowleaf water plantain
Alisma triviale Pursh
  northern water plantain
Sagittaria latifolia Willd.
  broadleaf arrowhead
Sagittaria latifolia var. 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 powellii S. Wats.
  Powell's amaranth
Amaranthus retroflexus L.
  redroot amaranth

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

APOCYNACEAE
Apocynum X floribundum Greene (pro sp.)
  intermediate dogbane
Apocynum androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium var. androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium var. incanum A. DC.
  spreading dogbane
Apocynum androsaemifolium ssp. pumilum (Gray) Boivin
  spreading dogbane
Apocynum androsaemifolium ssp. pumilum var. pumilum Gray
  low dogbane
Apocynum cannabinum L.
  Indianhemp
Apocynum medium Greene
  = Apocynum X floribundum
Apocynum sibiricum Jacq.
  = Apocynum cannabinum
Apocynum suksdorfii Greene
  = Apocynum cannabinum

ARACEAE
Lysichiton americanus Hulten & St. John
  American skunkcabbage

ARALIACEAE
Aralia nudicaulis L.
  wild sarsaparilla
Echinopanax horridus (Sm.) Dcne. & Planch. ex H.A.T. Harms
  = Oplopanax horridus
Oplopanax horridus Miq.
  devilsclub

ARISTOLOCHIACEAE
Asarum caudatum Lindl.
  British Columbia wildginger
Asarum caudatum var. caudatum Lindl.
  British Columbia wildginger

ASCLEPIADACEAE
Asclepias incarnata L.
  swamp milkweed
Asclepias pumila (Gray) Vail
  plains milkweed
Asclepias speciosa Torr.
  showy milkweed
Asclepias stenophylla Gray
  slimleaf milkweed
Asclepias syriaca L.
  common milkweed
Asclepias verticillata L.
  whorled milkweed
Asclepias viridiflora Raf.
  green milkweed

ASPLENIACEAE
Asplenium trichomanes L.
  maidenhair spleenwort
Asplenium trichomanes-ramosum L.
  brightgreen spleenwort

BALSAMINACEAE
Impatiens aurella Rydb.
  paleyellow touchmenot
Impatiens ecalcarata Blank.
  spurless touchmenot

BERBERIDACEAE
Berberis aquifolium Pursh
  = Mahonia aquifolium
Berberis repens Lindl.
  = Mahonia repens
Berberis vulgaris L.
  common barberry
Mahonia aquifolium (Pursh) Nutt.
  hollyleaved barberry
Mahonia repens (Lindl.) G. Don
  Oregongrape

BETULACEAE
Alnus incana (L.) Moench
  mountain alder
Alnus incana ssp. tenuifolia (Nutt.) Breitung
  thinleaf alder
Alnus viridis (Vill.) Lam. & DC.
  sitka alder
Alnus viridis ssp. sinuata (Regel) A.& D. Love
  Sitka alder
Betula X utahensis Britt. (pro sp.)
  northwestern paper birch
Betula nana L.
  bog birch
Betula occidentalis Hook.
  water birch
Betula papyrifera Marsh.
  paper birch
Betula papyrifera var. commutata (Regel) Fern.
  western paper birch

BORAGINACEAE
Amsinckia lycopsoides Lehm.
  tarweed fiddleneck
Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr.
  Menzies' fiddleneck
Anchusa arvensis (L.) Bieb.
  small bugloss
Anchusa azurea P. Mill.
  Italian bugloss
Anchusa officinalis L.
  common bugloss
Asperugo procumbens L.
  madwort
Borago officinalis L.
  common borage
Buglossoides arvensis (L.) I.M. Johnston
  corn gromwell
Cryptantha affinis (Gray) Greene
  quill catseye
Cryptantha ambigua (Gray) Greene
  basin 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 fendleri (Gray) Greene
  sanddune catseye
Cryptantha flavoculata (A. Nels.) Payson
  roughseed catseye
Cryptantha humilis (Gray) Payson
  roundspike catseye
Cryptantha kelseyana Greene
  Kelsey's catseye
Cryptantha minima Rydb.
  little catseye
Cryptantha sericea (Gray) Payson
  silky catseye
Cryptantha sobolifera Payson
  Waterton Lakes catseye
Cryptantha spiculifera (Piper) Payson
  Snake River catseye
Cryptantha torreyana (Gray) Greene
  Torrey's catseye
Cryptantha torreyana var. torreyana (Gray) Greene
  Torrey's catseye
Cryptantha watsonii (Gray) Greene
  Watson's catseye
Cynoglossum officinale L.
  gypsyflower
Echium vulgare L.
  common vipersbugloss
Eritrichium howardii (Gray) Rydb.
  Howard's 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
Eritrichium nanum var. elongatum (Rydb.) Cronq.
  arctic alpine forget me not
Hackelia cinerea (Piper) I.M. Johnston
  gray stickseed
Hackelia deflexa (Wahlenb.) Opiz
  nodding stickseed
Hackelia deflexa var. americana (Gray) Fern. & I.M. Johnston
  American stickseed
Hackelia floribunda (Lehm.) I.M. Johnston
  manyflower stickseed
Hackelia micrantha (Eastw.) J.L. Gentry
  Jessica sticktight
Hackelia patens (Nutt.) I.M. Johnston
  common stickseed
Hackelia patens var. patens (Nutt.) I.M. Johnston
  spotted stickseed
Heliotropium curassavicum L.
  salt heliotrope
Lappula cenchrusoides A. Nels.
  Great Plains stickseed
Lappula occidentalis (S. Wats.) Greene
  flatspine stickseed
Lappula occidentalis var. cupulata (Gray) Higgins
  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 incisum Lehm.
  narrowleaf gromwell
Lithospermum ruderale Dougl. ex Lehm.
  western gromwell
Mertensia alpina (Torr.) G. Don
  alpine bluebells
Mertensia bella Piper
  beautiful bluebells
Mertensia ciliata (James ex Torr.) G. Don
  mountain bluebells
Mertensia ciliata var. ciliata (James ex Torr.) G. Don
  tall fringe bluebells
Mertensia lanceolata (Pursh) DC.
  lanceleaf bluebells
Mertensia lanceolata var. nivalis (S. Wats.) Higgins
  greenleaf bluebells
Mertensia longiflora Greene
  small bluebells
Mertensia oblongifolia (Nutt.) G. Don
  oblongleaf bluebells
Mertensia paniculata (Ait.) G. Don
  tall bluebells
Mertensia paniculata var. borealis (J.F. Macbr.) L.O. Williams
  northern bluebells
Mertensia paniculata var. paniculata (Ait.) G. Don
  tall bluebells
Myosotis arvensis (L.) Hill
  field forget me not
Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja
  Asian forget me not
Myosotis discolor Pers.
  changing forget me not
Myosotis laxa Lehm.
  bay forget me not
Myosotis scorpioides L.
  true forget me not
Myosotis stricta Link ex Roemer & J.A. Schultes
  strict forget me not
Myosotis verna Nutt.
  spring forget me not
Onosmodium molle Michx.
  smooth onosmodium
Onosmodium molle ssp. occidentale (Mackenzie) Cochrane
  western onosmodium
Plagiobothrys leptocladus (Greene) I.M. Johnston
  finebranched popcornflower
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys scouleri var. hispidulus (Greene) Dorn
  sleeping popcornflower
Pulmonaria ciliata James ex Torr.
  = Mertensia ciliata var. ciliata
Symphytum officinale L.
  common comfrey

CABOMBACEAE
Brasenia schreberi J.F. Gmel.
  watershield

CACTACEAE
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 fragilis (Nutt.) Haw.
  brittle pricklypear
Opuntia fragilis var. fragilis (Nutt.) Haw.
  pygmy pricklypear
Opuntia humifusa (Raf.) Raf.
  pricklypear
Opuntia humifusa var. humifusa (Raf.) Raf.
  pricklypear
Opuntia macrorhiza Engelm.
  twistspine pricklypear
Opuntia macrorhiza var. macrorhiza Engelm.
  twistspine pricklypear
Opuntia polyacantha Haw.
  plains pricklypear
Opuntia polyacantha var. polyacantha Haw.
  hairspine pricklypear
Pediocactus simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus
Pediocactus simpsonii var. simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus

CALLITRICHACEAE
Callitriche hermaphroditica L.
  northern waterstarwort
Callitriche heterophylla Pursh
  larger waterstarwort
Callitriche heterophylla ssp. heterophylla Pursh
  twoheaded waterstarwort
Callitriche palustris L.
  vernal waterstarwort
Callitriche stagnalis Scop.
  pond waterstarwort

CAMPANULACEAE
Campanula glomerata L.
  Dane's blood
Campanula parryi Gray
  Parry's bellflower
Campanula parryi var. idahoensis McVaugh
  Idaho bellflower
Campanula rapunculoides L.
  rampion bellflower
Campanula rotundifolia L.
  bluebell bellflower
Campanula scabrella Engelm.
  rough bellflower
Campanula uniflora L.
  arctic bellflower
Downingia laeta (Greene) Greene
  Great Basin calicoflower
Heterocodon rariflorum Nutt.
  rareflower heterocodon
Howellia aquatilis Gray
  water howellia
Lobelia kalmii L.
  Ontario lobelia
Lobelia spicata Lam.
  palespike lobelia
Triodanis leptocarpa (Nutt.) Nieuwl.
  slimpod Venus' lookingglass
Triodanis perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass
Triodanis perfoliata var. 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
  common hop
Humulus lupulus var. neomexicanus A. Nels. & Cockerell
  common hop

CAPPARACEAE
Cleome lutea Hook.
  yellow spiderflower
Cleome lutea var. lutea Hook.
  yellow spiderflower
Cleome serrulata Pursh
  Rocky Mountain beeplant
Polanisia dodecandra (L.) DC.
  roughseed clammyweed
Polanisia dodecandra ssp. dodecandra (L.) DC.
  redwhisker clammyweed
Polanisia dodecandra ssp. trachysperma (Torr. & Gray) Iltis
  sandyseed clammyweed

CAPRIFOLIACEAE
Linnaea borealis L.
  twinflower
Linnaea borealis ssp. longiflora (Torr.) Hulten
  longtube twinflower
Lonicera caerulea L.
  sweetberry honeysuckle
Lonicera caerulea var. cauriana (Fern.) Boivin
  bluefly honeysuckle
Lonicera ciliosa (Pursh) Poir. ex DC.
  orange honeysuckle
Lonicera involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera tatarica L.
  Tatarian honeysuckle
Lonicera utahensis S. Wats.
  Utah honeysuckle
Sambucus canadensis L.
  = Sambucus nigra ssp. canadensis
Sambucus cerulea Raf.
  = Sambucus nigra ssp. cerulea
Sambucus cerulea var. cerulea Raf.
  blue elderberry
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. melanocarpa (Gray) McMinn
  black elderberry
Sambucus racemosa var. racemosa L.
Symphoricarpos albus (L.) Blake
  common snowberry
Symphoricarpos albus var. albus (L.) Blake
  common snowberry
Symphoricarpos albus var. laevigatus (Fern.) Blake
  common snowberry
Symphoricarpos occidentalis Hook.
  western snowberry
Symphoricarpos oreophilus Gray
  whortleleaf snowberry
Symphoricarpos oreophilus var. utahensis (Rydb.) A. Nels.
  Utah snowberry
Viburnum edule (Michx.) Raf.
  mooseberry viburnum
Viburnum lentago L.
  nannyberry
Viburnum opulus L.
  European cranberrybush viburnum
Viburnum opulus var. americanum Ait.
  American cranberry viburnum

CARYOPHYLLACEAE
Agrostemma githago L.
  common corncockle
Arenaria aculeata S. Wats.
  prickly sandwort
Arenaria capillaris Poir.
  mountain sandwort
Arenaria capillaris ssp. americana Maguire
  fescue sandwort
Arenaria congesta Nutt.
  ballhead sandwort
Arenaria congesta var. congesta Nutt.
  ballhead sandwort
Arenaria congesta var. lithophila (Rydb.) Maguire
  loosehead sandwort
Arenaria hookeri Nutt.
  Hooker's sandwort
Arenaria hookeri ssp. hookeri Nutt.
  Hooker's sandwort
Arenaria kingii (S. Wats.) M.E. Jones
  King's sandwort
Arenaria serpyllifolia L.
  thymeleaf sandwort
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
Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet
  big chickweed
Cerastium glomeratum Thuill.
  sticky chickweed
Cerastium nutans Raf.
  nodding chickweed
Cerastium nutans var. nutans Raf.
  nodding chickweed
Dianthus armeria L.
  Deptford pink
Dianthus barbatus L.
  sweetwilliam
Dianthus deltoides L.
  maiden pink
Gypsophila paniculata L.
  babysbreath gypsophila
Holosteum umbellatum L.
  jagged chickweed
Lychnis coronaria (L.) Desr.
  rose campion
Lychnis flos-cuculi L.
  ragged robin
Minuartia biflora (L.) Schinz & Thellung
  mountain stitchwort
Minuartia elegans (Cham. & Schlecht.) Schischkin
  elegant stitchwort
Minuartia nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia nuttallii ssp. nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia obtusiloba (Rydb.) House
  twinflower sandwort
Minuartia rossii (R. Br. ex Richards.) Graebn.
  Ross' sandwort
Minuartia rubella (Wahlenb.) Hiern
  beautiful sandwort
Minuartia yukonensis Hulten
  Yukon stitchwort
Moehringia lateriflora (L.) Fenzl
  bluntleaf sandwort
Moehringia macrophylla (Hook.) Fenzl
  largeleaf sandwort
Paronychia sessiliflora Nutt.
  creeping nailwort
Sagina nivalis (Lindbl.) Fries
  snow pearlwort
Sagina procumbens L.
  birdeye pearlwort
Sagina saginoides (L.) Karst.
  arctic pearlwort
Saponaria officinalis L.
  bouncingbet
Scleranthus annuus L.
  German knotgrass
Silene acaulis (L.) Jacq.
  moss campion
Silene acaulis var. exscapa (All.) DC.
  moss campion
Silene acaulis var. subacaulescens (F.N. Williams) Fern. & St. John
  moss campion
Silene antirrhina L.
  sleepy silene
Silene conoidea L.
  weed silene
Silene csereii Baumg.
  Balkan catchfly
Silene dichotoma Ehrh.
  dichotoma silene
Silene douglasii Hook.
  Douglas's campion
Silene douglasii var. douglasii Hook.
  Douglas's campion
Silene drummondii Hook.
  Drummond's campion
Silene drummondii var. drummondii Hook.
  Drummond's campion
Silene drummondii var. kruckebergii Bocquet
  Kruckeberg's campion
Silene kingii (S. Wats.) Bocquet
  King's campion
Silene latifolia Poir.
  bladder campion
Silene latifolia ssp. alba (P. Mill.) Greuter & Burdet
  bladder campion
Silene menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii var. menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii var. viscosa (Greene) C.L. Hitchc. & Maguire
  Menzies' campion
Silene noctiflora L.
  nightflowering silene
Silene oregana S. Wats.
  Oregon silene
Silene parryi (S. Wats.) C.L. Hitchc. & Maguire
  Parry's silene
Silene repens Patrin ex Pers.
  pink campion
Silene repens ssp. australis C.L. Hitchc. & Maguire
  pink campion
Silene scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri var. scouleri Hook.
  Scouler's campion
Silene spaldingii S. Wats.
  Spalding's silene
Silene uralensis (Rupr.) Bocquet
  apetalous catchfly
Silene uralensis ssp. montana (S. Wats.) McNeill
  apetalous catchfly
Silene uralensis ssp. uralensis (Rupr.) Bocquet
  mountain campion
Silene vulgaris (Moench) Garcke
  maidenstears
Spergula arvense L.
  corn spurry
Spergularia (Pers.) J.& K. Presl
  sandspurry
Spergularia rubra (L.) J.& K. Presl
  red sandspurry
Spergularia salina J.& K. Presl
  salt sandspurry
Spergularia salina var. salina J.& K. Presl
  salt sandspurry
Stellaria americana (Porter ex B.L. Robins.) Standl.
  American chickweed
Stellaria borealis Bigelow
  boreal starwort
Stellaria borealis ssp. sitchana (Steud.) Piper
  Sitka starwort
Stellaria calycantha (Ledeb.) Bong.
  northern starwort
Stellaria crassifolia Ehrh.
  fleshy starwort
Stellaria crassifolia var. crassifolia Ehrh.
  fleshy starwort
Stellaria crispa Cham. & Schlecht.
  curled starwort
Stellaria graminea L.
  grasslike starwort
Stellaria longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longifolia var. longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longipes Goldie
  longstalk starwort
Stellaria longipes ssp. longipes Goldie
  longstalk starwort
Stellaria media (L.) Vill.
  common chickweed
Stellaria nitens Nutt.
  shiny chickweed
Stellaria obtusa Engelm.
  Rocky Mountain chickweed
Stellaria umbellata Turcz. ex Kar. & Kir.
  umbrella starwort
Vaccaria hispanica (P. Mill.) Rauschert
  cow soapwort

CELASTRACEAE
Celastrus scandens L.
  American bittersweet
Euonymus alata (Thunb.) Sieb.
  winged spindletree
Euonymus atropurpurea Jacq.
  eastern wahoo
Paxistima myrsinites (Pursh) Raf.
  boxleaf myrtle

CERATOPHYLLACEAE
Ceratophyllum demersum L.
  coon's tail

CHENOPODIACEAE
Atriplex X aptera A. Nels. (pro sp.)
  fourwing saltbush
Atriplex argentea Nutt.
  silverscale saltbush
Atriplex argentea ssp. argentea Nutt.
  silverscale saltbush
Atriplex canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex confertifolia (Torr. & Frem.) S. Wats.
  shadscale saltbush
Atriplex falcata (M.E. Jones) Standl.
  sickle saltbush
Atriplex gardneri (Moq.) D. Dietr.
  Gardner's saltbush
Atriplex hortensis L.
  garden orache
Atriplex micrantha Ledeb.
  twoscale saltbush
Atriplex nuttallii S. Wats.
  Nuttall's 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 truncata (Torr. ex S. Wats.) Gray
  wedgescale saltbush
Axyris amaranthoides L.
  Russian pigweed
Bassia hyssopifolia (Pallas) Kuntz
  fivehorn smotherweed
Beta vulgaris L.
  common beet
Chenopodium album L.
  lambsquarters
Chenopodium atrovirens Rydb.
  pinyon goosefoot
Chenopodium berlandieri Moq.
  pitseed goosefoot
Chenopodium botrys L.
  Jerusalem oak goosefoot
Chenopodium capitatum (L.) Ambrosi
  blite goosefoot
Chenopodium fremontii S. Wats.
  Fremont's goosefoot
Chenopodium fremontii var. fremontii S. Wats.
  Fremont's goosefoot
Chenopodium glaucum L.
  oakleaf goosefoot
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
  narrowleaf goosefoot
Chenopodium murale L.
  nettleleaf goosefoot
Chenopodium overi Aellen
  Over's goosefoot
Chenopodium pratericola Rydb.
  desert goosefoot
Chenopodium rubrum L.
  red goosefoot
Chenopodium simplex (Torr.) Raf.
  mapleleaf goosefoot
Chenopodium standleyanum Aellen
  Standley's goosefoot
Chenopodium subglabrum (S. Wats.) A. Nels.
  smooth goosefoot
Chenopodium watsonii A. Nels.
  Watson's goosefoot
Corispermum hyssopifolium L.
  common bugseed
Corispermum orientale Lam.
  oriental 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
Kochia prostrata (L.) Schrad.
  prostrate summercypress
Kochia scoparia (L.) Schrad.
  common kochia
Krascheninnikovia lanata (Pursh) Guldenstaedt
  winterfat
Monolepis nuttalliana (J.A. Schultes) Greene
  Nuttall's povertyweed
Salicornia maritima Wolff & Jefferies
  slender grasswort
Salicornia rubra A. Nels.
  red swampfire
Salsola collina Pallas
  slender Russian thistle
Salsola kali L.
  prickly 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

CLUSIACEAE
Hypericum anagalloides Cham. & Schlecht.
  trailing St. Johnswort
Hypericum formosum ssp. scouleri (Hook.) C.L. Hitchc.
  = Hypericum scouleri ssp. scouleri
Hypericum majus (Gray) Britt.
  large St. Johnswort
Hypericum perforatum L.
  common St. Johnswort
Hypericum scouleri Hook.
  Scouler's St. Johnswort
Hypericum scouleri ssp. nortoniae (M.E. Jones) J. Gillett
  Norton's St. Johnswort
Hypericum scouleri ssp. scouleri Hook.
  Scouler's St. Johnswort

COMMELINACEAE
Tradescantia bracteata Small ex Britt.
  longbract spiderwort
Tradescantia occidentalis (Britt.) Smyth
  prairie spiderwort
Tradescantia occidentalis var. occidentalis (Britt.) Smyth
  prairie spiderwort

COMPOSITAE
Achillea lanulosa Nutt.
  = Achillea millefolium var. occidentalis
Achillea millefolium L.
  common yarrow
Achillea millefolium var. alpicola (Rydb.) Garrett
  common yarrow
Achillea millefolium var. occidentalis DC.
  western yarrow
Achillea nobilis L.
  noble yarrow
Achillea sibirica Ledeb.
  Siberian yarrow
Acroptilon repens (L.) DC.
  hardheads
Adenocaulon bicolor Hook.
  American trailplant
Ageratina occidentalis (Hook.) King & H.E. Robins.
  western snakeroot
Agoseris aurantiaca (Hook.) Greene
  orange agoseris
Agoseris aurantiaca var. aurantiaca (Hook.) Greene
  orange agoseris
Agoseris aurantiaca var. purpurea (Gray) Cronq.
  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 grandiflora (Nutt.) Greene
  bigflower agoseris
Agoseris heterophylla (Nutt.) Greene
  annual agoseris
Agoseris heterophylla var. heterophylla (Nutt.) Greene
  annual agoseris
Ambrosia acanthicarpa Hook.
  flatspine burr ragweed
Ambrosia artemisiifolia L.
  annual 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 alpina (L.) Gaertn.
  alpine pussytoes
Antennaria anaphaloides Rydb.
  pearly pussytoes
Antennaria aromatica Evert
  scented pussytoes
Antennaria corymbosa E. Nels.
  flattop pussytoes
Antennaria densifolia Porsild
  denseleaf pussytoes
Antennaria dimorpha (Nutt.) Torr. & Gray
  low pussytoes
Antennaria howellii Greene
  Howell's pussytoes
Antennaria howellii ssp. howellii Greene
  Howell's pussytoes
Antennaria howellii ssp. neodioica (Greene) Bayer
  field pussytoes
Antennaria howellii ssp. petaloidea (Fern.) Bayer
  small pussytoes
Antennaria lanata (Hook.) Greene
  woolly pussytoes
Antennaria luzuloides Torr. & Gray
  rush pussytoes
Antennaria media Greene
  Rocky Mountain pussytoes
Antennaria microphylla Rydb.
  littleleaf pussytoes
Antennaria monocephala DC.
  pygmy pussytoes
Antennaria neglecta Greene
  field pussytoes
Antennaria pulcherrima (Hook.) Greene
  showy pussytoes
Antennaria racemosa Hook.
  raceme pussytoes
Antennaria rosea Greene
  rosy pussytoes
Antennaria rosea ssp. confinis (Greene) Bayer
  rosy pussytoes
Antennaria rosea ssp. pulvinata (Greene) Bayer
  pulvinate pussytoes
Antennaria rosea ssp. rosea Greene
  rosy pussytoes
Antennaria umbrinella Rydb.
  umber pussytoes
Anthemis cotula L.
  stinking chamomile
Arctium lappa L.
  greater burrdock
Arctium minus Bernh.
  lesser burrdock
Arnica X diversifolia Greene (pro sp.)
  rayless arnica
Arnica alpina (L.) Olin
  alpine arnica
Arnica amplexicaulis Nutt.
  clasping arnica
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. chamissonis Less.
  chamisso arnica
Arnica chamissonis ssp. chamissonis var. interior Maguire
  chamisso arnica
Arnica chamissonis ssp. foliosa (Nutt.) Maguire
  chamisso arnica
Arnica chamissonis ssp. foliosa var. andina (Nutt.) Ediger & Barkl.
  chamisso arnica
Arnica chamissonis ssp. foliosa var. maguirei (A. Nels.) Maguire
  chamisso arnica
Arnica cordifolia Hook.
  heartleaf arnica
Arnica fulgens Pursh
  foothill arnica
Arnica gracilis Rydb.
  smallhead arnica
Arnica latifolia Bong.
  broadleaf arnica
Arnica lonchophylla Greene
  longleaf arnica
Arnica lonchophylla ssp. arnoglossa (Greene) Maguire
  seep arnica
Arnica longifolia D.C. Eat.
  spearleaf arnica
Arnica mollis Hook.
  hairy arnica
Arnica parryi Gray
  Parry's arnica
Arnica parryi ssp. parryi Gray
  Parry's arnica
Arnica rydbergii Greene
  Rydberg's arnica
Arnica sororia Greene
  twin arnica
Artemisia absinthium L.
  European wormwood
Artemisia annua L.
  sweet annie
Artemisia arbuscula Nutt.
  low sagebrush
Artemisia arbuscula ssp. arbuscula Nutt.
  gray low sagebrush
Artemisia arbuscula ssp. longiloba (Osterhout) L. Shultz
  alkali sagebrush
Artemisia arctica Less.
  boreal sagebrush
Artemisia arctica ssp. arctica Less.
  boreal sagebrush
Artemisia biennis Willd.
  biennial wormwood
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 cana Pursh
  silver sagebrush
Artemisia cana ssp. cana Pursh
  silver sagebrush
Artemisia dracunculus L.
  false tarragon
Artemisia frigida Willd.
  fringed sagewort
Artemisia lindleyana Bess.
  northwest sagebrush
Artemisia longifolia Nutt.
  longleaf sagebrush
Artemisia ludoviciana Nutt.
  estafiate
Artemisia ludoviciana ssp. candicans (Rydb.) Keck
  estafiate
Artemisia ludoviciana ssp. incompta (Nutt.) Keck
  estafiate
Artemisia ludoviciana ssp. ludoviciana Nutt.
  estafiate
Artemisia michauxiana Bess.
  Michaux's sagebrush
Artemisia nova A. Nels.
  black sagebrush
Artemisia pedatifida Nutt.
  birdfoot sagebrush
Artemisia rigida (Nutt.) Gray
  stiff sagebrush
Artemisia scopulorum Gray
  alpine sagebrush
Artemisia spinescens D.C. Eat.
  bud sagebrush
Artemisia tilesii Ledeb.
  Tilesius' wormwood
Artemisia tilesii ssp. elatior (Torr. & Gray) Hulten
  Tilesius' wormwood
Artemisia tilesii ssp. unalaschcensis (Bess.) Hulten
  Alaska 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
Aster ascendens Lindl.
  Chile aster
Aster borealis (Torr. & Gray) Prov.
  rush aster
Aster bracteolatus Nutt. (pro sp.)
  bract aster
Aster campestris Nutt.
  meadow aster
Aster ciliolatus Lindl.
  Lindley's aster
Aster ciliolatus var. ciliolatus Lindl.
  Lindley's aster
Aster conspicuus Lindl.
  showy aster
Aster cusickii Gray
  Cusick's aster
Aster eatonii (Gray) T.J. Howell
  Eaton's aster
Aster ericoides L.
  heath aster
Aster ericoides var. pansus (Blake) Boivin
  manyflowered aster
Aster falcatus Lindl.
  cluster aster
Aster foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster foliaceus var. apricus Gray
  leafybract aster
Aster foliaceus var. canbyi Gray
  Canby's aster
Aster foliaceus var. parryi (D.C. Eat.) Gray
  Parry's aster
Aster hendersonii Fern.
  Lyall aster
Aster integrifolius Nutt.
  thickstem aster
Aster laevis L.
  smooth aster
Aster lanceolatus Willd.
  white panicle aster
Aster lanceolatus ssp. hesperius (Gray) Semple & Chmielewski
  Siskiyou aster
Aster lanceolatus ssp. lanceolatus Willd.
  white panicle aster
Aster lanceolatus ssp. lanceolatus var. lanceolatus Willd.
  white panicle aster
Aster longifolius Lam.
  longleaf aster
Aster meritus A. Nels.
Aster oblongifolius Nutt.
  aromatic aster
Aster occidentalis (Nutt.) Torr. & Gray
  western aster
Aster occidentalis var. fremontii (Torr. & Gray) A.G. Jones
  Fremont's aster
Aster perelegans A. Nels. & J.F. Macbr.
  elegant aster
Aster sibiricus L.
  Siberian aster
Aster sibiricus var. giganteus (Hook.) Gray
  giant arctic aster
Aster subspicatus Nees
  Douglas aster
Aster subspicatus var. subspicatus Nees
  leafybract aster
Balsamita major Desf.
  costmary
Balsamorhiza incana Nutt.
  hoary balsamroot
Balsamorhiza macrophylla Nutt.
  cutleaf balsamroot
Balsamorhiza sagittata (Pursh) Nutt.
  arrowleaf balsamroot
Bellis perennis L.
  lawndaisy
Bidens cernua L.
  nodding beggartick
Bidens frondosa L.
  devil's beggartick
Bidens tripartita L.
  threelobe beggarticks
Bidens vulgata Greene
  big devils beggartick
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 eupatorioides (L.) Shinners
  false boneset
Brickellia eupatorioides var. corymbulosa (Torr. & Gray) Shinners
  false boneset
Brickellia grandiflora (Hook.) Nutt.
  tasselflower brickellbush
Brickellia oblongifolia Nutt.
  Mojave brickellbush
Brickellia oblongifolia var. oblongifolia Nutt.
  narrowleaf brickellbush
Canadanthus modestus (Lindl.) Nesom
Carduus acanthoides L.
  spiny plumeless thistle
Carduus nutans L.
  nodding plumeless thistle
Carduus nutans ssp. macrolepis (Peterm.) Kazmi
  nodding plumeless thistle
Centaurea biebersteinii DC.
  spotted knapweed
Centaurea cyanus L.
  garden cornflower
Centaurea diffusa Lam.
  white knapweed
Centaurea jacea L.
  brownray knapweed
Centaurea montana L.
  mountain cornflower
Centaurea nigra L.
  lesser knapweed
Centaurea scabiosa L.
  greater knapweed
Centaurea solstitialis L.
  yellow star thistle
Chaenactis douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis douglasii var. alpina Gray
  alpine dustymaiden
Chaenactis douglasii var. douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chrysanthemum balsamita (L.) Baill., non L.
  = Balsamita major
Chrysanthemum leucanthemum L.
  = Leucanthemum vulgare
Chrysothamnus graveolens (Nutt.) Greene
  = Ericameria nauseosa ssp. nauseosa var. glabrata
Chrysothamnus linifolius Greene
  spearleaf rabbitbrush
Chrysothamnus nauseosus (Pallas ex Pursh) Britt.
  = Ericameria nauseosa ssp. nauseosa var. nauseosa
Chrysothamnus nauseosus ssp. nauseosus (Pallas ex Pursh) Britt.
  rubber rabbitbrush
Chrysothamnus viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. lanceolatus (Nutt.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Cichorium intybus L.
  chicory
Cirsium arvense (L.) Scop.
  Canadian thistle
Cirsium brevistylum Cronq.
  clustered thistle
Cirsium canescens Nutt.
  prairie thistle
Cirsium canovirens (Rydb.) Petrak
  graygreen thistle
Cirsium flodmanii (Rydb.) Arthur
  Flodman's thistle
Cirsium foliosum (Hook.) DC.
  elk thistle
Cirsium hookerianum Nutt.
  white thistle
Cirsium longistylum Moore & Frankton
  longstyle thistle
Cirsium neomexicanum Gray
  New Mexico thistle
Cirsium pulcherrimum (Rydb.) K. Schum.
  Wyoming thistle
Cirsium scariosum Nutt.
  meadow thistle
Cirsium scariosum var. scariosum Nutt.
  meadow thistle
Cirsium subniveum Rydb.
  Jackson Hole thistle
Cirsium undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium undulatum var. undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium vulgare (Savi) Ten.
  bull thistle
Conyza canadensis (L.) Cronq.
  Canadian horseweed
Coreopsis tinctoria Nutt.
  golden tickseed
Coreopsis tinctoria var. atkinsoniana (Dougl. ex Lindl.) H.M. Parker
  Atkinson's tickseed
Coreopsis tinctoria var. tinctoria Nutt.
  golden tickseed
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 atribarba ssp. originalis (Babcock & Stebbins) Babcock & Stebbins
  slender hawksbeard
Crepis elegans Hook.
  elegant 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 nicaeensis Balbis ex Pers.
  Turkish hawksbeard
Crepis occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. pumila (Rydb.) Babcock & Stebbins
  largeflower hawksbeard
Crepis runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis runcinata ssp. glauca (Nutt.) Babcock & Stebbins
  fiddleleaf hawksbeard
Crepis runcinata ssp. hispidulosa (T.J. Howell ex Rydb.) Babcock & Stebbins
  fiddleleaf hawksbeard
Crepis runcinata ssp. runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis tectorum L.
  narrowleaf hawksbeard
Dugaldia hoopesii (Gray) Rydb.
  = Hymenoxys hoopesii
Dyssodia papposa (Vent.) A.S. Hitchc.
  fetid marigold
Echinacea angustifolia DC.
  blacksamson echinacea
Echinacea angustifolia var. angustifolia DC.
  blacksamson echinacea
Ericameria discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria discoidea var. discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria discoidea var. linearis (Rydb.) Nesom
  whitestem heathgoldenrod
Ericameria nana Nutt.
  dwarf heathgoldenrod
Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa var. glabrata 
Ericameria nauseosa ssp. nauseosa var. nauseosa 
Ericameria nauseosa ssp. nauseosa var. speciosa 
Ericameria suffruticosa (Nutt.) Nesom
  singlehead heathgoldenrod
Erigeron acris L.
Erigeron acris ssp. acris L.
Erigeron acris ssp. acris var. debilis 
Erigeron acris ssp. politus (Fries) Schinz & R. Keller
Erigeron allocotus Blake
  Big Horn fleabane
Erigeron asper Nutt.
  rough fleabane
Erigeron asperugineus (D.C. Eat.) Gray
  Idaho fleabane
Erigeron bellidiastrum Nutt.
  western daisy fleabane
Erigeron bellidiastrum var. bellidiastrum Nutt.
  western daisy fleabane
Erigeron caespitosus Nutt.
  tufted fleabane
Erigeron compositus Pursh
  cutleaf daisy
Erigeron corymbosus Nutt.
  longleaf 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 evermannii Rydb.
  Evermann's fleabane
Erigeron filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron filifolius var. filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron flabellifolius Rydb.
  fanleaf fleabane
Erigeron flagellaris Gray
  trailing fleabane
Erigeron formosissimus Greene
  beautiful fleabane
Erigeron formosissimus var. viscidus (Rydb.) Cronq.
  beautiful fleabane
Erigeron glabellus Nutt.
  streamside fleabane
Erigeron glabellus var. glabellus Nutt.
  streamside fleabane
Erigeron glabellus var. pubescens Hook.
  streamside fleabane
Erigeron gracilis Rydb.
  quill fleabane
Erigeron grandiflorus Hook.
  largeflower fleabane
Erigeron humilis Graham
  arctic alpine fleabane
Erigeron lanatus Hook.
  woolly fleabane
Erigeron linearis (Hook.) Piper
  desert yellow fleabane
Erigeron lonchophyllus Hook.
Erigeron ochroleucus Nutt.
  buff fleabane
Erigeron ochroleucus var. ochroleucus Nutt.
  buff fleabane
Erigeron peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. scaposus (Torr. & Gray) Cronq.
  subalpine fleabane
Erigeron philadelphicus L.
  Philadelphia fleabane
Erigeron pumilus Nutt.
  shaggy fleabane
Erigeron pumilus ssp. intermedius Cronq.
  shaggy fleabane
Erigeron pumilus ssp. intermedius var. gracilior Cronq.
  shaggy fleabane
Erigeron pumilus ssp. intermedius var. intermedius (Cronq.) Cronq.
  shaggy fleabane
Erigeron pumilus ssp. pumilus Nutt.
  shaggy fleabane
Erigeron radicatus Hook.
  taproot fleabane
Erigeron rydbergii Cronq.
  Rydberg's 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 subtrinervis var. conspicuus (Rydb.) Cronq.
  threenerve fleabane
Erigeron subtrinervis var. subtrinervis Rydb. ex Porter & Britt.
  threenerve fleabane
Erigeron tener (Gray) Gray
  slender fleabane
Erigeron tweedyi Canby
  Tweedy's fleabane
Erigeron ursinus D.C. Eat.
  Bear River fleabane
Eriophyllum lanatum (Pursh) Forbes
  woolly eriophyllum
Eriophyllum lanatum var. integrifolium (Hook.) Smiley
  common woollysunflower
Eriophyllum lanatum var. lanatum (Pursh) Forbes
  common woollysunflower
Eucephalus engelmannii (D.C. Eat.) Greene
Eupatorium maculatum L.
  spotted joepyeweed
Eupatorium maculatum var. bruneri (Gray) Breitung
  spotted joepyeweed
Eupatorium occidentale Hook.
  = Ageratina occidentalis
Euthamia graminifolia (L.) Nutt.
  flattop goldentop
Euthamia graminifolia var. graminifolia (L.) Nutt.
  flattop goldentop
Euthamia occidentalis Nutt.
  western goldentop
Evax prolifera Nutt. ex DC.
  bighead pygmycudweed
Filago arvensis L.
  field cottonrose
Franseria 
  = Ambrosia 
Gaillardia aristata Pursh
  common gaillardia
Galinsoga quadriradiata Ruiz & Pavon
  shaggysoldier
Gamochaeta purpurea (L.) Cabrera
  spoonleaf purple everlasting
Gnaphalium canescens ssp. microcephalum (Nutt.) Stebbins & Keil
  = Pseudognaphalium canescens ssp. microcephalum
Gnaphalium chilense Spreng.
  = Pseudognaphalium stramineum
Gnaphalium chilense var. confertifolium Greene
  = Pseudognaphalium stramineum
Gnaphalium microcephalum Nutt.
  = Pseudognaphalium canescens ssp. microcephalum
Gnaphalium palustre Nutt.
  western marsh cudweed
Gnaphalium stramineum Kunth
  = Pseudognaphalium stramineum
Gnaphalium viscosum Kunth
  = Pseudognaphalium viscosum
Grindelia howellii Steyermark
  Howell's gumweed
Grindelia nana Nutt.
  Idaho gumweed
Grindelia nana var. integerrima (Rydb.) Steyermark
  Idaho gumweed
Grindelia nana var. nana Nutt.
  Idaho gumweed
Grindelia squarrosa (Pursh) Dunal
  curlycup gumweed
Grindelia squarrosa var. quasiperennis Lunell
  curlycup gumweed
Grindelia squarrosa var. serrulata (Rydb.) Steyermark
  curlycup gumweed
Grindelia squarrosa var. squarrosa (Pursh) Dunal
  curlycup gumweed
Gutierrezia sarothrae (Pursh) Britt. & Rusby
  broom snakeweed
Haplopappus armerioides (Nutt.) Gray
  = Stenotus armerioides var. armerioides
Haplopappus carthamoides (Hook.) Gray
  = Pyrrocoma carthamoides var. carthamoides
Haplopappus contractus Hall
  = Pyrrocoma uniflora var. uniflora
Haplopappus integrifolius Porter ex Gray
  = Pyrrocoma integrifolia
Haplopappus lanuginosus Gray
  = Stenotus lanuginosus var. lanuginosus
Haplopappus macronema (Nutt.) Gray
  = Ericameria discoidea var. discoidea
Haplopappus pygmaeus (Torr. & Gray) Gray
  = Tonestus pygmaeus
Haplopappus spinulosus (Pursh) DC.
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Haplopappus suffruticosus (Nutt.) Gray
  = Ericameria suffruticosa
Haplopappus texensis R.C. Jackson
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Haplopappus uniflorus (Hook.) Torr. & Gray
  = Pyrrocoma uniflora var. uniflora
Helenium autumnale L.
  common sneezeweed
Helenium autumnale var. montanum (Nutt.) Fern.
  mountain sneezeweed
Helenium hoopesii Gray
  = Hymenoxys hoopesii
Helianthella quinquenervis (Hook.) Gray
  fivenerve helianthella
Helianthella uniflora (Nutt.) Torr. & Gray
  oneflower helianthella
Helianthella uniflora var. douglasii (Torr. & Gray) W.A. Weber
  Douglas' helianthella
Helianthella uniflora var. uniflora (Nutt.) Torr. & Gray
  oneflower helianthella
Helianthus X laetiflorus Pers. (pro sp.)
  mountain sunflower
Helianthus annuus L.
  common sunflower
Helianthus maximiliani Schrad.
  Maximilian sunflower
Helianthus nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus nuttallii ssp. nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus nuttallii ssp. rydbergii (Britt.) R.W. Long
  Rydberg's sunflower
Helianthus pauciflorus Nutt.
  stiff sunflower
Helianthus pauciflorus ssp. pauciflorus Nutt.
  stiff sunflower
Helianthus pauciflorus ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling
  stiff sunflower
Helianthus petiolaris Nutt.
  prairie sunflower
Helianthus petiolaris ssp. petiolaris Nutt.
  prairie sunflower
Heliomeris multiflora Nutt.
  showy goldeneye
Heliomeris multiflora var. multiflora Nutt.
  showy goldeneye
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 canadense Michx.
  Canadian hawkweed
Hieracium canadense var. canadense Michx.
  Canadian hawkweed
Hieracium cynoglossoides Arv.-Touv.
  houndstongue hawkweed
Hieracium gracile Hook.
  slender hawkweed
Hieracium gracile var. gracile Hook.
  slender hawkweed
Hieracium scouleri Hook.
  woollyweed
Hieracium scouleri var. scouleri Hook.
  Scouler's woollyweed
Hulsea algida Gray
  pain hulsea
Hymenopappus filifolius Hook.
  fineleaf hymenopappus
Hymenopappus filifolius var. luteus (Nutt.) B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. polycephalus (Osterhout) B.L. Turner
  manyhead hymenopappus
Hymenoxys hoopesii (Gray) Bierner
Hymenoxys richardsonii (Hook.) Cockerell
  pingue hymenoxys
Hymenoxys richardsonii var. richardsonii (Hook.) Cockerell
  pingue hymenoxys
Ionactis alpina (Nutt.) Greene
  alpine ionactis
Ionactis stenomeres (Gray) Greene
  ionactis
Iva axillaris Pursh
  povertyweed
Iva xanthifolia Nutt.
  giant sumpweed
Lactuca biennis (Moench) Fern.
  tall blue lettuce
Lactuca canadensis L.
  Canada 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
Lapsana communis L.
  common nipplewort
Leucanthemum leucanthemum (L.) Rydb.
  = Leucanthemum vulgare
Leucanthemum vulgare Lam.
  oxeyedaisy
Liatris ligulistylis (A. Nels.) K. Schum.
  Rocky Mountain gayfeather
Liatris punctata Hook.
  dotted gayfeather
Liatris punctata var. punctata Hook.
  dotted gayfeather
Lygodesmia juncea (Pursh) D. Don ex Hook.
  rush skeletonplant
Machaeranthera bigelovii (Gray) Greene
  Bigelow's tansyaster
Machaeranthera bigelovii var. commixta (Greene) B.L. Turner
  Bigelow's tansyaster
Machaeranthera canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens var. canescens (Pursh) Gray
  cutleaf goldenweed
Machaeranthera grindelioides (Nutt.) Shinners
  rayless aster
Machaeranthera grindelioides var. grindelioides (Nutt.) Shinners
  rayless aster
Machaeranthera pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera pinnatifida ssp. pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera tanacetifolia (Kunth) Nees
  tanseyleaf aster
Madia exigua (Sm.) Gray
  small tarweed
Madia glomerata Hook.
  mountain tarweed
Madia gracilis (Sm.) Keck & J. Clausen ex Applegate
  grassy tarweed
Madia gracilis ssp. gracilis (Sm.) Keck & J. Clausen ex Applegate
  grassy tarweed
Madia minima (Gray) Keck
  oppositeleaved tarweed
Malacothrix torreyi Gray
  Torrey's desertdandelion
Matricaria discoidea DC.
  disc mayweed
Matricaria matricarioides (Less.) Porter
  = Matricaria discoidea
Matricaria suaveolens (Pursh) Buch., non L.
  = Matricaria discoidea
Megalodonta beckii (Torr. ex Spreng.) Greene
  aquatic beggartick
Megalodonta beckii var. beckii (Torr. ex Spreng.) Greene
  Beck's watermarigold
Microseris nutans (Hook.) Schultz-Bip.
  nodding microceris
Microseris nutans ssp. nutans (Hook.) Schultz-Bip.
  nodding silverpuffs
Nothocalais cuspidata (Pursh) Greene
  sharppoint microseris
Nothocalais nigrescens (Henderson) Heller
  meadow microseris
Nothocalais troximoides (Gray) Greene
  weevil microseris
Oligoneuron album (Nutt.) Nesom
Oligoneuron rigidum (L.) Small
Oligoneuron rigidum var. humile (Porter) Nesom
Oligoneuron rigidum var. rigidum (L.) Small
Onopordum acanthium L.
  Scotch cottonthistle
Oonopsis multicaulis (Nutt.) Greene
  branched goldenweed
Oreostemma alpigenum (Torr. & Gray) Nesom
Oreostemma alpigenum var. alpigenum (Torr. & Gray) Nesom
Oreostemma alpigenum var. haydenii (Porter) Nesom
Petasites sagittatus (Banks ex Pursh) Gray
  arrowleaf sweet coltsfoot
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britt.
  oppositeleaf bahia
Platyschkuhria integrifolia (Gray) Rydb.
  oblongleaf bahia
Platyschkuhria integrifolia var. integrifolia (Gray) Rydb.
  basindaisy
Prenanthes racemosa Michx.
  purple rattlesnakeroot
Prenanthes racemosa ssp. multiflora Cronq.
  purple rattlesnakeroot
Prenanthes sagittata (Gray) A. Nels.
  arrowleaf rattlesnakeroot
Pseudognaphalium canescens (DC.) W.A. Weber
Pseudognaphalium canescens ssp. microcephalum (Nutt.) Kartesz, comb. nov. ined.
Pseudognaphalium stramineum (Kunth) W.A. Weber
Pseudognaphalium viscosum (Kunth) W.A. Weber
Psilocarphus brevissimus Nutt.
  short woollyheads
Psilocarphus brevissimus var. brevissimus Nutt.
  short woollyheads
Pyrrocoma carthamoides Hook.
  largeflower goldenweed
Pyrrocoma carthamoides var. carthamoides Hook.
  loved goldenweed
Pyrrocoma integrifolia (Porter ex Gray) Greene
  manysted goldenweed
Pyrrocoma lanceolata (Hook.) Greene
  lanceleaf goldenweed
Pyrrocoma uniflora (Hook.) Greene
  plantain goldenweed
Pyrrocoma uniflora var. uniflora (Hook.) Greene
  plantain goldenweed
Ratibida columnifera (Nutt.) Woot. & Standl.
  upright prairie coneflower
Rudbeckia laciniata L.
  cutleaf coneflower
Rudbeckia laciniata var. ampla (A. Nels.) Cronq.
  cutleaf coneflower
Rudbeckia laciniata var. laciniata L.
  cutleaf coneflower
Rudbeckia occidentalis Nutt.
  western coneflower
Rudbeckia occidentalis var. occidentalis Nutt.
  western coneflower
Saussurea americana D.C. Eat.
  American saussurea
Saussurea densa (Hook.) Rydb.
  clustered sawwort
Scorzonera laciniata L.
  cutleaf vipergrass
Senecio amplectens Gray
  showy alpine groundsel
Senecio amplectens var. holmii (Greene) Harrington
  Holm's ragwort
Senecio aureus var. borealis Torr. & Gray
  = Senecio streptanthifolius var. borealis
Senecio canus Hook.
  woolly groundsel
Senecio crassulus Gray
  thickleaf groundsel
Senecio crocatus Rydb.
  saffron ragwort
Senecio cymbalaria Pursh
  dwarf arctic ragwort
Senecio cymbalarioides Buek
  cleftleaf groundsel
Senecio debilis Nutt.
  weak groundsel
Senecio dimorphophyllus Greene
  splitleaf groundsel
Senecio dimorphophyllus var. paysonii T.M. Barkl.
  Payson's groundsel
Senecio eremophilus Richards.
  desert groundsel
Senecio eremophilus var. eremophilus Richards.
  desert groundsel
Senecio fremontii Torr. & Gray
  Fremont's groundsel
Senecio fuscatus Hayek
  fuscatus groundsel
Senecio hydrophiloides Rydb.
  tall groundwel
Senecio hydrophilus Nutt.
  water groundsel
Senecio indecorus Greene
  elegant groundsel
Senecio integerrimus Nutt.
  lambstongue groundsel
Senecio integerrimus var. exaltatus (Nutt.) Cronq.
  Columbia groundsel
Senecio integerrimus var. integerrimus Nutt.
  lambstongue groundsel
Senecio integerrimus var. ochroleucus (Gray) Cronq.
  paleyellow groundsel
Senecio integerrimus var. scribneri (Rydb.) T.M. Barkl.
  Scribner's groundsel
Senecio lugens Richards.
  small blacktip groundsel
Senecio megacephalus Nutt.
  rocky groundsel
Senecio pauciflorus Pursh
  alpine groundsel
Senecio pauperculus Michx.
  balsam groundsel
Senecio plattensis Nutt.
  prairie groundsel
Senecio pseudaureus Rydb.
  falsegold groundsel
Senecio pseudaureus var. pseudaureus Rydb.
  falsegold groundsel
Senecio serra Hook.
  butterweed groundsel
Senecio serra var. serra Hook.
  tall ragwort
Senecio sphaerocephalus Greene
  ballhead groundsel
Senecio streptanthifolius Greene
  cleftleaf groundsel
Senecio streptanthifolius var. borealis (Torr. & Gray) J.F. Bain
  Rocky Mountain groundsel
Senecio triangularis Hook.
  arrowleaf groundsel
Senecio vulgaris L.
  common groundsel
Senecio werneriifolius (Gray) Gray
  hoary groundsel
Solidago canadensis L.
  Canada goldenrod
Solidago canadensis var. gilvocanescens Rydb.
  shorthair goldenrod
Solidago canadensis var. salebrosa (Piper) M.E. Jones
  salebrosa goldenrod
Solidago gigantea Ait.
  giant goldenrod
Solidago missouriensis Nutt.
  Missouri goldenrod
Solidago missouriensis var. missouriensis Nutt.
  Missouri goldenrod
Solidago mollis Bartl.
  velvety goldenrod
Solidago mollis var. 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 rugosa P. Mill.
  wrinkleleaf goldenrod
Solidago rugosa ssp. rugosa P. Mill.
  wrinkleleaf goldenrod
Solidago rugosa ssp. rugosa var. villosa (Pursh) Fern.
  wrinkleleaf 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. spathulata 
Sonchus arvensis L.
  field sowthistle
Sonchus arvensis ssp. 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 acaulis var. acaulis (Nutt.) Nutt.
  stemless goldenweed
Stenotus armerioides Nutt.
  thrift mock goldenweed
Stenotus armerioides var. armerioides Nutt.
  thrifty goldenweed
Stenotus lanuginosus (Gray) Greene
  woolly mock goldenweed
Stenotus lanuginosus var. andersonii (Rydb.) Hall
  Anderson's goldenweed
Stenotus lanuginosus var. lanuginosus (Gray) Greene
  cespitose goldenweed
Stephanomeria runcinata Nutt.
  desert wirelettuce
Stephanomeria spinosa (Nutt.) S. Tomb
  thorn skeletonweed
Stephanomeria tenuifolia (Raf.) Hall
  narrowleaf wirelettuce
Stephanomeria tenuifolia var. tenuifolia (Raf.) Hall
  narrowleaf wirelettuce
Tanacetum balsamita L.
  = Balsamita major
Tanacetum vulgare L.
  common tansy
Taraxacum eriophorum Rydb.
  woolbearing dandelion
Taraxacum laevigatum (Willd.) DC.
  rock 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
Taraxacum officinale ssp. officinale G.H. Weber ex Wiggers
  wandering dandelion
Tetradymia canescens DC.
  spineless horsebrush
Tetradymia spinosa Hook. & Arn.
  shortspine horsebrush
Tetraneuris acaulis (Pursh) Greene
  stemless hymenoxys
Tetraneuris acaulis var. acaulis (Pursh) Greene
  stemless hymenoxys
Tetraneuris grandiflora (Torr. & Gray ex Gray) Parker
  graylocks hymenoxys
Tetraneuris torreyana (Nutt.) Greene
  Torrey's hymenoxys
Thelesperma subnudum Gray
  sand fringedpod
Thelesperma subnudum var. marginatum (Rydb.) T.E. Melchert ex Cronq.
  greenthread border
Tonestus aberrans (A. Nels.) Nesom & Morgan
  Idaho goldenweed
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 condensata Parry ex Gray
  hairy townsendia
Townsendia condensata var. condensata Parry ex Gray
  cushion townsend daisy
Townsendia exscapa (Richards.) Porter
  stemless townsendia
Townsendia florifer (Hook.) Gray
  showy townsendia
Townsendia hookeri Beaman
  Hooker's townsendia
Townsendia incana Nutt.
  hoary townsendia
Townsendia leptotes (Gray) Osterhout
  common townsendia
Townsendia parryi D.C. Eat.
  Parry's townsend daisy
Townsendia spathulata Nutt.
  sword townsendia
Tragopogon dubius Scop.
  yellow salsify
Tragopogon miscellus Ownbey
  Moscow salsify
Tragopogon porrifolius L.
  salsify
Tragopogon pratensis L.
  meadow salsify
Trimorpha acris (L.) Nesom
  bitter boreal daisy
Trimorpha lonchophylla var. lonchophylla (Hook.) Nesom
  spearleaf fleabane
Tripleurospermum maritima (L.) W.D.J. Koch
Tripleurospermum maritima ssp. maritima (L.) W.D.J. Koch
Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray
  golden crownbeard
Vernonia fasciculata Michx.
  prairie ironweed
Vernonia fasciculata ssp. corymbosa (Schwein. ex Keating) S.B. Jones
  prairie ironweed
Wyethia amplexicaulis (Nutt.) Nutt.
  mulesears wyethia
Wyethia helianthoides Nutt.
  sunflower wyethia
Wyethia scabra Hook.
  badlands wyethia
Wyethia scabra var. scabra Hook.
  badlands mulesears
Xanthium spinosum L.
  spiny cockleburr
Xanthium strumarium L.
  rough cockleburr
Xanthium strumarium var. canadense (P. Mill.) Torr. & Gray
  Canada cockleburr
Xanthocephalum sarothrae (Pursh) Shinners
  = Gutierrezia sarothrae
Xylorhiza glabriuscula Nutt.
  smooth woodyaster
Xylorhiza glabriuscula var. glabriuscula Nutt.
  smooth woodyaster

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
Calystegia sepium ssp. sepium (L.) R. Br.
  hedge false bindweed
Convolvulus arvensis L.
  field bindweed
Cuscuta approximata Bab.
  alfalfa dodder
Cuscuta approximata var. urceolata (Kunze) Yuncker
  alfalfa dodder
Cuscuta coryli Engelm.
  hazel dodder
Cuscuta epithymum L.
  clover 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 megalocarpa Rydb.
  bigfruit dodder
Cuscuta pentagona Engelm.
  fiveangled dodder
Cuscuta pentagona var. pentagona Engelm.
  fiveangled dodder
Evolvulus nuttallianus J.A. Schultes
  shaggy dwarf morningglory
Ipomoea leptophylla Torr.
  bush morningglory

CORNACEAE
Cornus alba L. p.p.
  = Cornus sericea ssp. sericea
Cornus canadensis L.
  bunchberry dogwood
Cornus sericea L.
  redosier dogwood
Cornus sericea ssp. occidentalis (Torr. & Gray) Fosberg
  western dogwood
Cornus sericea ssp. sericea L.
  redosier dogwood

CRASSULACEAE
Crassula saginoides (Maxim.) Bywater & Wickens
  wrinkleseed pygmyweed
Rhodiola integrifolia Raf.
  = Sedum integrifolium ssp. integrifolium
Sedum acre L.
  goldmoss stonecrop
Sedum borschii (Clausen) Clausen
  Leiberg stonecrop
Sedum debile S. Wats.
  orpine 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 lanceolatum ssp. subalpinum (Blank.) Clausen
  subalpine stonecrop
Sedum rhodanthum Gray
  redpod stonecrop
Sedum stenopetalum Pursh
  wormleaf stonecrop
Sedum stenopetalum ssp. stenopetalum Pursh
  wormleaf stonecrop
Tillaea 
  = Crassula saginoides

CROSSOSOMATACEAE
Glossopetalon spinescens Gray
  spiny greasebush
Glossopetalon spinescens var. aridum M.E. Jones
  spiny greasebush

CRUCIFERAE
Alyssum alyssoides (L.) L.
  pale madwort
Alyssum desertorum Stapf
  desert madwort
Alyssum minus (L.) Rothm.
Alyssum minus var. micranthum (C.A. Mey.) Dudley
Arabidopsis salsuginea (Pallas) N. Busch
  saltwater cress
Arabidopsis thaliana (L.) Heynh.
  mouseear cress
Arabis X divaricarpa A. Nels. (pro sp.)
  spreadingpod rockcress
Arabis drummondii Gray
  Drummond's rockcress
Arabis fecunda Rollins
  Mt. Sapphire rockcress
Arabis glabra (L.) Bernh.
  tower rockcress
Arabis glabra var. glabra (L.) Bernh.
  tower 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. collinsii (Fern.) Rollins
  Collins' rockcress
Arabis holboellii var. pendulocarpa (A. Nels.) Rollins
  dropseed rockcress
Arabis holboellii var. pinetorum (Tidestrom) Rollins
  Holboell's rockcress
Arabis holboellii var. retrofracta (Graham) Rydb.
  second rockcress
Arabis lemmonii S. Wats.
  Lemmon's rockcress
Arabis lemmonii var. drepanoloba (Greene) Rollins
  soldier rockcress
Arabis lemmonii var. lemmonii S. Wats.
  Lemmon's rockcress
Arabis lignifera A. Nels.
  desert rockcress
Arabis lyallii S. Wats.
  Lyall's rockcress
Arabis lyallii var. lyallii S. Wats.
  Lyall's rockcress
Arabis microphylla Nutt.
  littleleaf rockcress
Arabis microphylla var. macounii (S. Wats.) Rollins
  Macoun's rockcress
Arabis microphylla var. microphylla Nutt.
  smallleaf rockcress
Arabis nuttallii B.L. Robins.
  Nuttall's rockcress
Arabis puberula Nutt.
  silver rockcress
Arabis sparsiflora Nutt.
  sicklepod rockcress
Arabis sparsiflora var. columbiana (Macoun) Rollins
  Columbian rockcress
Arabis sparsiflora var. subvillosa (S. Wats.) Rollins
  hairystem rockcress
Arabis williamsii Rollins
  Wind River rockcress
Arabis williamsii var. saximontana (Rollins) Rollins
  Cross Mountain rockcress
Athysanus pusillus (Hook.) Greene
  common sandweed
Barbarea orthoceras Ledeb.
  American yellowrocket
Barbarea vulgaris Ait. f.
  garden yellowrocket
Berteroa incana (L.) DC.
  hoary false madwort
Brassica juncea (L.) Czern.
  India mustard
Brassica napus L.
  rape
Brassica nigra (L.) W.D.J. Koch
  black mustard
Brassica rapa L.
  rape mustard
Brassica rapa var. rapa L.
  birdrape
Camelina microcarpa DC.
  littlepod falseflax
Camelina sativa (L.) Crantz
  gold-of-pleasure
Camelina sativa ssp. sativa (L.) Crantz
  gold-of-pleasure
Capsella bursa-pastoris (L.) Medik.
  shepherd's purse
Cardamine breweri S. Wats.
  Brewer's bittercress
Cardamine breweri var. breweri S. Wats.
  Brewer's bittercress
Cardamine breweri var. leibergii (Holz.) C.L. Hitchc.
  Leiberg's bittercress
Cardamine oligosperma Nutt.
  Idaho bittercress
Cardamine oligosperma var. oligosperma Nutt.
  little western bittercress
Cardamine pensylvanica Muhl. ex Willd.
  Pennsylvania bittercress
Cardamine rupicola (O.E. Schulz) C.L. Hitchc.
  cliff bittercress
Cardaria chalapensis (L.) Hand.-Maz.
Cardaria draba (L.) Desv.
  pepperweed whitetop
Cardaria pubescens (C.A. Mey.) Jarmolenko
  hairy whitetop
Chorispora tenella (Pallas) DC.
  crossflower
Conringia orientalis (L.) Dumort.
  hare's ear mustard
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn
  mountain tansymustard
Descurainia incana ssp. incana (Bernh. ex Fisch. & C.A. Mey.) Dorn
  mountain tansymustard
Descurainia incana ssp. incisa (Engelm.) Kartesz & Gandhi
  mountain tansymustard
Descurainia incana ssp. procera (Greene) Kartesz & Gandhi
  mountain tansymustard
Descurainia incana ssp. viscosa (Rydb.) Kartesz & Gandhi
  mountain tansymustard
Descurainia pinnata (Walt.) Britt.
  western tansymustard
Descurainia pinnata ssp. brachycarpa (Richards.) Detling
  western tansymustard
Descurainia pinnata ssp. filipes (Gray) Detling
  western tansymustard
Descurainia pinnata ssp. intermedia (Rydb.) Detling
  western tansymustard
Descurainia pinnata ssp. nelsonii (Rydb.) Detling
  Nelson's tansymustard
Descurainia sophia (L.) Webb ex Prantl
  herb sophia
Diplotaxis muralis (L.) DC.
  annual wallrocket
Draba albertina Greene
  slender whitlowgrass
Draba aurea Vahl ex Hornem.
  golden whitlowgrass
Draba brachycarpa Nutt. ex Torr. & Gray
  shortpod whitlowgrass
Draba breweri S. Wats.
  cushion whitlowgrass
Draba breweri var. cana (Rydb.) Rollins
Draba crassa Rydb.
  thickleaf whitlowgrass
Draba crassifolia Graham
  snowbed whitlowgrass
Draba crassifolia var. crassifolia Graham
  snowbed whitlowgrass
Draba daviesiae (C.L. Hitchc.) Rollins
  bitter root whitlowgrass
Draba densifolia Nutt.
  denseleaf whitlowgrass
Draba fladnizensis Wulfen
  Austrian whitlowgrass
Draba glabella Pursh
  smooth whitlowgrass
Draba globosa Payson
  beavertip whitlowgrass
Draba incerta Payson
  Yellowstone whitlowgrass
Draba lonchocarpa Rydb.
  lancepod whitlowgrass
Draba lonchocarpa var. lonchocarpa Rydb.
  lancepod whitlowgrass
Draba macounii O.E. Schulz
  Macoun's whitlowgrass
Draba nemorosa L.
  woodland whitlowgrass
Draba nivalis Lilj.
  yellow arctic whitlowgrass
Draba oligosperma Hook.
  fewseed whitlowgrass
Draba oreibata J.F. Macbr. & Payson ex Payson
  limestone whitlowgrass
Draba paysonii J.F. Macbr.
  Payson's whitlowgrass
Draba paysonii var. paysonii J.F. Macbr.
  Payson's whitlowgrass
Draba paysonii var. treleasii (O.E. Schulz) C.L. Hitchc.
  Trelease's whitlowgrass
Draba porsildii Mulligan
  Porsild's whitlowgrass
Draba praealta Greene
  tall whitlowgrass
Draba reptans (Lam.) Fern.
  Carolina whitlowgrass
Draba ventosa Gray
  Wind River whitlowgrass
Draba verna L.
  spring whitlowgrass
Eruca vesicaria (L.) Cav.
  rocketsalad
Eruca vesicaria ssp. sativa (P. Mill.) Thellung
  rocketsalad
Erucastrum gallicum (Willd.) O.E. Schulz
  common dogmustard
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 inconspicuum var. inconspicuum (S. Wats.) MacM.
  shy wallflower
Erysimum repandum L.
  spreading wallflower
Hesperis matronalis L.
  dames rocket
Hutchinsia procumbens (L.) Desv.
  prostrate hutchinsia
Idahoa scapigera (Hook.) A. Nels. & J.F. Macbr.
  oldstem idahoa
Isatis tinctoria L.
  Dyer's woad
Lepidium bourgeauanum Thellung
  Bourgeau's pepperweed
Lepidium campestre (L.) Ait. f.
  field pepperweed
Lepidium densiflorum Schrad.
  common pepperweed
Lepidium densiflorum var. densiflorum Schrad.
  common pepperweed
Lepidium densiflorum var. macrocarpum Mulligan
  bigseed pepperweed
Lepidium densiflorum var. pubecarpum (A. Nels.) Thellung
  babyseed pepperweed
Lepidium latifolium L.
  broadleaved pepperweed
Lepidium montanum Nutt.
  mountain pepperweed
Lepidium montanum var. montanum Nutt.
  mountain pepperweed
Lepidium perfoliatum L.
  clasping pepperweed
Lepidium ramosissimum A. Nels.
  manybranched pepperweed
Lepidium sativum L.
  gardencress pepperweed
Lepidium virginicum L.
  Virginia pepperweed
Lepidium virginicum var. pubescens (Greene) Thellung
  hairy pepperweed
Lesquerella alpina (Nutt.) S. Wats.
  alpine bladderpod
Lesquerella arenosa (Richards.) Rydb.
  Great Plains bladderpod
Lesquerella arenosa var. arenosa (Richards.) Rydb.
  Great Plains bladderpod
Lesquerella carinata Rollins
  Idaho bladderpod
Lesquerella condensata A. Nels.
  dense bladderpod
Lesquerella humilis Rollins
  St. Marys Peak bladderpod
Lesquerella klausii Rollins
  Rogers Pass bladderpod
Lesquerella ludoviciana (Nutt.) S. Wats.
  foothill bladderpod
Lobularia maritima (L.) Desv.
  seaside lobularia
Malcolmia africana (L.) Ait. f.
  African mustard
Nasturtium nasturtium-aquaticum (L.) Karsten
  = Rorippa nasturtium-aquaticum
Nasturtium officinale Ait. f.
  = Rorippa nasturtium-aquaticum
Physaria acutifolia Rydb.
  sharpleaf twinpod
Physaria acutifolia var. acutifolia Rydb.
  southern twinpod
Physaria brassicoides Rydb.
  double twinpod
Physaria didymocarpa (Hook.) Gray
  common twinpod
Physaria didymocarpa var. didymocarpa (Hook.) Gray
  common twinpod
Physaria didymocarpa var. lanata A. Nels.
  common twinpod
Physaria geyeri (Hook.) Gray
  Geyer's twinpod
Physaria geyeri var. geyeri (Hook.) Gray
  Geyer's twinpod
Physaria saximontana Rollins
  Fremont County twinpod
Physaria saximontana var. dentata Rollins
  Fremont County twinpod
Raphanus raphanistrum L.
  wild radish
Raphanus sativus L.
  wild radish
Rorippa alpina (S. Wats.) Rydb.
  alpine yellowcress
Rorippa calycina (Engelm.) Rydb.
  persistent sepal yellowcress
Rorippa curvipes Greene
  bluntleaf yellowcress
Rorippa curvipes var. curvipes Greene
  bluntleaf yellowcress
Rorippa curvipes var. truncata (Jepson) Rollins
Rorippa curvisiliqua (Hook.) Bess. ex Britt.
  curvepod yellowcress
Rorippa curvisiliqua var. curvisiliqua (Hook.) Bess. ex Britt.
  curvepod yellowcress
Rorippa curvisiliqua var. orientalis R. Stuckey
  oriental 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 palustris ssp. occidentalis (S. Wats.) Abrams
  western bog yellowcress
Rorippa sinuata (Nutt.) A.S. Hitchc.
  spreading yellowcress
Rorippa sylvestris (L.) Bess.
  creeping yellowcress
Rorippa tenerrima Greene
  Modoc yellowcress
Schoenocrambe linifolia (Nutt.) Greene
  flaxleaf plainsmustard
Sinapis alba L.
  white mustard
Sinapis arvensis L.
  charlock mustard
Sisymbrium altissimum L.
  tall tumblemustard
Sisymbrium loeselii L.
  small tumbleweed mustard
Sisymbrium officinale (L.) Scop.
  hedgemustard
Smelowskia calycina (Steph. ex Willd.) C.A. Mey.
  alpine smelowskia
Smelowskia calycina var. americana (Regel & Herder) Drury & Rollins
  American false candytuft
Stanleya pinnata (Pursh) Britt.
  desert princesplume
Stanleya pinnata var. pinnata (Pursh) Britt.
  pinnate princesplume
Stanleya tomentosa Parry
  hairy princesplume
Stanleya viridiflora Nutt.
  green princesplume
Streptanthella longirostris (S. Wats.) Rydb.
  longbeak streptanthella
Thelypodium integrifolium (Nutt.) Endl. ex Walp.
  entireleaved thelypody
Thelypodium integrifolium ssp. integrifolium (Nutt.) Endl. ex Walp.
  entireleaved 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
Thlaspi arvense L.
  field pennycress
Thlaspi montanum L.
  alpine pennycress
Thlaspi montanum var. montanum L.
  alpine pennycress
Thlaspi parviflorum A. Nels.
  meadow pennycress

CUCURBITACEAE
Bryonia alba L.
  white bryony
Echinocystis lobata (Michx.) Torr. & Gray
  wild cucumber
Marah oreganus (Torr. ex S. Wats.) T.J. Howell
  coastal manroot

CUPRESSACEAE
Juniperus communis L.
  common juniper
Juniperus horizontalis Moench
  creeping juniper
Juniperus osteosperma (Torr.) Little
  Utah juniper
Juniperus scopulorum Sarg.
  Rocky Mountain juniper
Thuja plicata Donn ex D. Don
  western redcedar

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

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

DROSERACEAE
Drosera anglica Huds.
  English sundew
Drosera linearis Goldie
  slenderleaf sundew
Drosera rotundifolia L.
  roundleaf sundew

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
Elatine californica Gray
  California waterwort
Elatine triandra Schkuhr
  threestamen waterwort

EQUISETACEAE
Equisetum X ferrissii Clute (pro sp.)
  Ferriss' horsetail
Equisetum X mackaii (Newm.) Brichan
  MacKai's horsetail
Equisetum X nelsonii (A.A. Eat.) Schaffn. (pro sp.)
  Nelson's horsetail
Equisetum arvense L.
  field horsetail
Equisetum fluviatile L.
  water horsetail
Equisetum hyemale L.
  scouringrush horsetail
Equisetum laevigatum A. Braun
  smooth horsetail
Equisetum palustre L.
  marsh horsetail
Equisetum pratense Ehrh.
  meadow horsetail
Equisetum scirpoides Michx.
  dwarf scouringrush
Equisetum sylvaticum L.
  woodland 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 patula Greene
  greenleaf manzanita
Arctostaphylos uva-ursi (L.) Spreng.
  kinnikinnick
Cassiope mertensiana (Bong.) D. Don
  western moss heather
Cassiope mertensiana var. gracilis (Piper) C.L. Hitchc.
  western moss heather
Cassiope mertensiana var. mertensiana (Bong.) D. Don
  western moss heather
Cassiope tetragona (L.) D. Don
  white arctic mountain heather
Cassiope tetragona var. saximontana (Small) C.L. Hitchc.
  white arctic mountain heather
Chimaphila menziesii (R. Br. ex D. Don) Spreng.
  little prince's pine
Chimaphila umbellata (L.) W. Bart.
  pipsissewa
Chimaphila umbellata ssp. occidentalis (Rydb.) Hulten
  pipsissewa
Gaultheria humifusa (Graham) Rydb.
  alpine spicywintergreen
Gaultheria ovatifolia Gray
  western teaberry
Kalmia microphylla (Hook.) Heller
  alpine laurel
Kalmia polifolia ssp. microphylla (Hook.) Calder & Taylor
  = Kalmia microphylla
Ledum glandulosum Nutt.
  Western Labradortea
Menziesia ferruginea Sm.
  rusty menziesia
Moneses uniflora (L.) Gray
  single delight
Orthilia secunda (L.) House
  sidebells wintergreen
Phyllodoce X intermedia (Hook.) Rydb. (pro sp.)
  hybrid mountainheath
Phyllodoce empetriformis (Sm.) D. Don
  pink mountainheath
Phyllodoce glanduliflora (Hook.) Coville
  yellow mountainheath
Pyrola asarifolia Michx.
  liverleaf wintergreen
Pyrola asarifolia ssp. asarifolia Michx.
  liverleaf wintergreen
Pyrola asarifolia ssp. bracteata (Hook.) Haber
  pink wintergreen
Pyrola chlorantha Sw.
  greenflowered wintergreen
Pyrola elliptica Nutt.
  waxflower shinleaf
Pyrola minor L.
  snowline wintergreen
Pyrola pallida Greene
  = Pyrola picta
Pyrola picta Sm.
  whiteveined wintergreen
Pyrola secunda L.
  = Orthilia secunda
Rhododendron albiflorum Hook.
  Cascade azalea
Vaccinium X nubigenum Fern. (pro sp.)
  vaccinium
Vaccinium cespitosum Michx.
  dwarf blueberry
Vaccinium cespitosum var. cespitosum Michx.
  tall bilberry
Vaccinium membranaceum Dougl. ex Torr.
  blue huckleberry
Vaccinium myrtilloides Michx.
  velvetleaf huckleberry
Vaccinium myrtillus L.
  whortleberry
Vaccinium ovalifolium Sm.
  ovalleaf blueberry
Vaccinium scoparium Leib. ex Coville
  grouse whortleberry
Vaccinium uliginosum L.
  bog blueberry

EUPHORBIACEAE
Chamaesyce geyeri (Engelm.) Small
  Geyer's sandmat
Chamaesyce glyptosperma (Engelm.) Small
  ribseed sandmat
Chamaesyce maculata (L.) Small
  spotted sandmat
Chamaesyce missurica (Raf.) Shinners
  prairie sandmat
Chamaesyce serpens (Kunth) Small
  matted sandmat
Chamaesyce serpyllifolia (Pers.) Small
  thymeleaf sandmat
Chamaesyce serpyllifolia ssp. serpyllifolia (Pers.) Small
  thymeleaf sandmat
Euphorbia commutata Engelm.
  tinted woodland spurge
Euphorbia cyparissias L.
  cypress spurge
Euphorbia esula L.
  wolf's milk
Euphorbia esula var. esula L.
  wolf's milk
Euphorbia glyptosperma Engelm.
  = Chamaesyce glyptosperma
Euphorbia helioscopia L.
  madwoman's milk
Euphorbia hexagona Nutt. ex Spreng.
  sixangle spurge
Euphorbia maculata L.
  = Chamaesyce maculata
Euphorbia marginata Pursh
  snow on the mountain
Euphorbia missurica Raf.
  = Chamaesyce missurica
Euphorbia nuttallii (Engelm.) Small
  = Chamaesyce missurica
Euphorbia peplus L.
  petty spurge
Euphorbia robusta (Engelm.) Small
  Rocky Mountain spurge
Euphorbia serpens Kunth
  = Chamaesyce serpens
Euphorbia serpyllifolia Pers.
  = Chamaesyce serpyllifolia ssp. serpyllifolia
Euphorbia spathulata Lam.
  warty spurge

FAGACEAE
Quercus macrocarpa Michx.
  bur oak

FUMARIACEAE
Corydalis aurea Willd.
  scrambledeggs
Corydalis aurea ssp. aurea Willd.
  scrambledeggs
Corydalis aurea ssp. occidentalis (Engelm. ex Gray) G.B. Ownbey
  scrambledeggs
Corydalis sempervirens (L.) Pers.
  rock harlequin
Dicentra uniflora Kellogg
  longhorn steershead
Fumaria officinalis L.
  drug fumitory

GENTIANACEAE
Amarella 
  = Gentianella amarella 
Centaurium exaltatum (Griseb.) W. Wight ex Piper
  desert centaury
Frasera albicaulis Dougl. ex Griseb.
  whitestem elkweed
Frasera albicaulis var. albicaulis Dougl. ex Griseb.
  whitestem elkweed
Frasera speciosa Dougl. ex Griseb.
  green gentian
Gentiana affinis Griseb.
  pleated gentian
Gentiana algida Pallas
  whitish gentian
Gentiana amarella L. auct. p.p.
  = Gentianella amarella ssp. acuta
Gentiana calycosa Griseb.
  Rainier pleated gentian
Gentiana crinita Froel.
  = Gentianopsis crinita
Gentiana forwoodii Gray
  = Gentiana affinis
Gentiana fremontii Torr.
  moss gentian
Gentiana glauca Pallas
  pale gentian
Gentiana macounii Holm
  = Gentianopsis macounii
Gentiana propinqua Richards.
  = Gentianella propinqua ssp. propinqua
Gentiana prostrata Haenke
  pygmy gentian
Gentiana rusbyi Greene
  = Gentiana affinis
Gentiana simplex Gray
  = Gentianopsis simplex
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 propinqua (Richards.) J. Gillett
  fourpart dwarfgentian
Gentianella propinqua ssp. propinqua (Richards.) J. Gillett
  fourpart dwarfgentian
Gentianella tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianella tenella ssp. tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianopsis crinita (Froel.) Ma
  greater fringedgentian
Gentianopsis macounii (Holm) Iltis
  Macoun's fringedgentian
Gentianopsis simplex (Gray) Iltis
  oneflower fringedgentian
Gentianopsis thermalis (Kuntze) Iltis
  Rocky Mountain fringedgentian
Halenia deflexa (Sm.) Griseb.
  American spurredgentian
Halenia deflexa ssp. deflexa (Sm.) Griseb.
  American spurredgentian
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 bicknellii Britt.
  Bicknell's cranesbill
Geranium carolinianum L.
  Carolina geranium
Geranium molle L.
  dovefoot geranium
Geranium pusillum L.
  small geranium
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
Geranium viscosissimum var. viscosissimum Fisch. & C.A. Mey. ex C.A. Mey.
  sticky purple geranium

GROSSULARIACEAE
Grossularia 
  = Ribes 
Ribes americanum P. Mill.
  American black currant
Ribes aureum Pursh
  golden currant
Ribes aureum var. aureum Pursh
  golden currant
Ribes aureum var. villosum DC.
  golden currant
Ribes cereum Dougl.
  wax currant
Ribes cereum var. cereum Dougl.
  wax currant
Ribes cereum var. pedicellare Brewer & S. Wats.
  whisky currant
Ribes hirtellum Michx.
  hairystem gooseberry
Ribes hudsonianum Richards.
  northern black currant
Ribes hudsonianum var. petiolare (Dougl.) Jancz.
  western black currant
Ribes inerme Rydb.
  whitestem gooseberry
Ribes inerme var. inerme Rydb.
  whitestem gooseberry
Ribes lacustre (Pers.) Poir.
  prickly currant
Ribes missouriense Nutt.
  Missouri gooseberry
Ribes montigenum McClatchie
  gooseberry currant
Ribes oxyacanthoides L.
  Canadian gooseberry
Ribes oxyacanthoides ssp. cognatum (Greene) Sinnott
  stream currant
Ribes oxyacanthoides ssp. hendersonii (C.L. Hitchc.) Sinnott
  Henderson's currant
Ribes oxyacanthoides ssp. irriguum (Dougl.) Sinnott
  Idaho gooseberry
Ribes oxyacanthoides ssp. oxyacanthoides L.
  Canadian gooseberry
Ribes oxyacanthoides ssp. setosum (Lindl.) Sinnott
  inland gooseberry
Ribes rubrum L.
  cultivated currant
Ribes triste Pallas
  red currant
Ribes viscosissimum Pursh
  sticky currant
Ribes viscosissimum var. viscosissimum Pursh
  sticky currant

HALORAGACEAE
Myriophyllum sibiricum Komarov
  shortspike watermilfoil
Myriophyllum verticillatum L.
  whorlleaf watermilfoil

HIPPURIDACEAE
Hippuris vulgaris L.
  common marestail

HYDRANGEACEAE
Philadelphus inodorus L.
  scentless mockorange
Philadelphus lewisii Pursh
  Lewis' mockorange
Philadelphus lewisii var. gordonianus (Lindl.) Jepson
  Gordon's mockorange
Philadelphus lewisii var. helleri (Rydb.) Hu
  Heller's mockorange
Philadelphus lewisii var. intermedius (A. Nels.) Hu
  intermediate mockorange
Philadelphus lewisii var. lewisii Pursh
  Lewis' mockorange
Philadelphus lewisii var. parvifolius Hu
  Lewis' mockorange
Philadelphus lewisii var. platyphyllus (Rydb.) Hu
  Lewis' mockorange
Philadelphus trichothecus Hu
  Columbian mockorange

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

HYDROPHYLLACEAE
Ellisia nyctelea (L.) L.
  Aunt Lucy
Hesperochiron californicus (Benth.) S. Wats.
  California hesperochiron
Hesperochiron pumilus (Dougl. ex Griseb.) Porter
  dwarf hesperochiron
Hydrophyllum capitatum Dougl. ex Benth.
  ballhead waterleaf
Nemophila breviflora Gray
  basin nemophila
Phacelia bakeri (Brand) J.F. Macbr.
  Baker's scorpionweed
Phacelia franklinii (R. Br.) Gray
  Franklin's phacelia
Phacelia glandulosa Nutt.
  glandular phacelia
Phacelia hastata Dougl. ex Lehm.
  silverleaf phacelia
Phacelia hastata var. hastata Dougl. ex Lehm.
  silverleaf phacelia
Phacelia heterophylla Pursh
  varileaf phacelia
Phacelia heterophylla ssp. heterophylla Pursh
  varileaf phacelia
Phacelia incana Brand
  hoary phacelia
Phacelia ivesiana Torr.
  Ives' phacelia
Phacelia leptosepala Rydb.
  narrowsepal scorpionweed
Phacelia linearis (Pursh) Holz.
  threadleaf phacelia
Phacelia lyallii (Gray) Rydb.
  alpine phacelia
Phacelia scopulina (A. Nels.) J.T. Howell
  Debeque phacelia
Phacelia scopulina var. scopulina (A. Nels.) J.T. Howell
  Debeque phacelia
Phacelia sericea (Graham) Gray
  silky phacelia
Phacelia sericea ssp. sericea (Graham) Gray
  purplefringe
Phacelia thermalis Greene
  heated phacelia
Romanzoffia sitchensis Bong.
  Sitka mistmaiden

IRIDACEAE
Iris missouriensis Nutt.
  Rocky Mountain iris
Iris pseudacorus L.
  paleyellow iris
Sisyrinchium halophilum Greene
  Nevada blueeyed grass
Sisyrinchium idahoense Bickn.
  Idaho blueeyed grass
Sisyrinchium idahoense var. idahoense Bickn.
  Idaho blueeyed grass
Sisyrinchium idahoense var. occidentale (Bickn.) D. Henderson
  Idaho blueeyed grass
Sisyrinchium montanum Greene
  mountain blueeyed grass
Sisyrinchium montanum var. montanum Greene
  mountain blueeyed grass

ISOETACEAE
Isoetes bolanderi Engelm.
  Bolander's quillwort
Isoetes bolanderi var. bolanderi Engelm.
  Bolander's quillwort
Isoetes howellii Engelm.
  Howell's quillwort
Isoetes melanopoda Gay & Durieu ex Durieu
  blackfoot quillwort
Isoetes nuttallii A. Braun ex Engelm.
  Nuttall's quillwort
Isoetes nuttallii var. nuttallii A. Braun ex Engelm.
  Nuttall's quillwort
Isoetes occidentalis Henderson
  western quillwort
Isoetes tenella LÇman

LABIATAE
Agastache cusickii (Greenm.) Heller
  Cusick's giant hyssop
Agastache foeniculum (Pursh) Kuntze
  blue giant hyssop
Agastache urticifolia (Benth.) Kuntze
  nettleleaf giant hyssop
Agastache urticifolia var. urticifolia (Benth.) Kuntze
  nettleleaf giant hyssop
Clinopodium vulgare L.
  wild basil
Dracocephalum parviflorum Nutt.
  American dragonhead
Dracocephalum thymiflorum L.
  thymeleaf dragonhead
Galeopsis tetrahit L.
  brittlestem 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 arvensis L.
  wild mint
Mentha canadensis L.
  Canadian mint
Mentha spicata L.
  spearmint
Mentha viridis L.
  = Mentha spicata
Micromeria chamissonis (Benth.) Greene
  = Satureja douglasii
Monarda fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa var. fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa var. menthifolia (Graham) Fern.
  wild oregano
Monarda fistulosa ssp. fistulosa var. mollis (L.) Benth.
  oswego tea
Monarda menthifolia Graham
  = Monarda fistulosa ssp. fistulosa var. menthifolia
Monardella glauca Greene
Nepeta cataria L.
  catnip
Physostegia parviflora Nutt. ex Gray
  western false dragonhead
Physostegia virginiana (L.) Benth.
  obedient plant
Physostegia virginiana ssp. virginiana (L.) Benth.
  obedient plant
Prunella vulgaris L.
  common selfheal
Salvia X sylvestris L. (pro sp.)
  woodland sage
Salvia nemorosa L.
  woodland sage
Salvia reflexa Hornem.
  chán
Salvia sclarea L.
  sclary sage
Satureja chamissonis (Benth.) Briq.
  = Satureja douglasii
Satureja douglasii (Benth.) Briq.
  yerba buena
Scutellaria epilobiifolia A. Hamilton
  = Scutellaria galericulata
Scutellaria galericulata L.
  marsh skullcap
Scutellaria lateriflora L.
  blue skullcap
Scutellaria lateriflora var. lateriflora L.
  blue 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.
  Candad germander
Teucrium canadense var. occidentale (Gray) McClintock & Epling
  western germander
Thymus praecox Opiz
  mother of thyme
Thymus praecox ssp. arcticus (Dur.) Jalas
  creeping thyme

LEGUMINOSAE
Amorpha canescens Pursh
  leadplant
Astragalus adsurgens Pallas
  standing milkvetch
Astragalus adsurgens var. robustior Hook.
  prairie milkvetch
Astragalus agrestis Dougl. ex G. Don
  purple milkvetch
Astragalus alpinus L.
  alpine milkvetch
Astragalus alpinus var. alpinus L.
  alpine milkvetch
Astragalus americanus (Hook.) M.E. Jones
  American milkvetch
Astragalus aretioides (M.E. Jones) Barneby
  cushion milkvetch
Astragalus argophyllus Nutt.
  silverleaf milkvetch
Astragalus argophyllus var. argophyllus Nutt.
  silverleaf milkvetch
Astragalus argophyllus var. martinii M.E. Jones
  silverleaf milkvetch
Astragalus atropubescens Coult. & Fisher
  hangingpod milkvetch
Astragalus australis (L.) Lam.
  Indian milkvetch
Astragalus barrii Barneby
  Barr's milkvetch
Astragalus bisulcatus (Hook.) Gray
  twogrooved milkvetch
Astragalus bisulcatus var. bisulcatus (Hook.) Gray
  twogrooved milkvetch
Astragalus bourgovii Gray
  Bourgov's milkvetch
Astragalus canadensis L.
  Canadian milkvetch
Astragalus canadensis var. brevidens (Gandog.) Barneby
  shorttooth 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. apus Barneby
  painted milkvetch
Astragalus ceramicus var. filifolius (Gray) F.J. Herm.
  painted milkvetch
Astragalus chamaeleuce Gray
  cicada milkvetch
Astragalus cibarius Sheldon
  silky milkvetch
Astragalus cicer L.
  cicer milkvetch
Astragalus convallarius Greene
  timber milkvetch
Astragalus convallarius var. convallarius Greene
  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 diversifolius Gray
  meadow milkvetch
Astragalus drummondii Dougl. ex Hook.
  Drummond's milkvetch
Astragalus eucosmus B.L. Robins.
  elegant milkvetch
Astragalus falcatus Lam.
  Russian milkvetch
Astragalus flexuosus (Hook.) Dougl. ex G. Don
  flexile milkvetch
Astragalus flexuosus var. flexuosus (Hook.) Dougl. ex G. Don
  flexile milkvetch
Astragalus geyeri Gray
  Geyer's milkvetch
Astragalus geyeri var. geyeri Gray
  Geyer's milkvetch
Astragalus gilviflorus Sheldon
  plains milkvetch
Astragalus gracilis Nutt.
  slender milkvetch
Astragalus grayi Parry ex S. Wats.
  Gray's milkvetch
Astragalus hyalinus M.E. Jones
  summer milkvetch
Astragalus inflexus Dougl. ex Hook.
  bent milkvetch
Astragalus kentrophyta Gray
  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. salinus (T.J. Howell) Barneby
  salty loco milkvetch
Astragalus leptaleus Gray
  meadow milkvetch
Astragalus lotiflorus Hook.
  lotus milkvetch
Astragalus microcystis Gray
  dwarf milkvetch
Astragalus miser Dougl.
  weedy milkvetch
Astragalus miser var. crispatus (M.E. Jones) Cronq.
  Lemhi loco milkvetch
Astragalus miser var. decumbens (Nutt. ex Torr. & Gray) Cronq.
  prostrate loco milkvetch
Astragalus miser var. hylophilus (Rydb.) Barneby
  woody loco milkvetch
Astragalus miser var. miser Dougl.
  timber milkvetch
Astragalus miser var. praeteritus Barneby
  Yellowstone loco milkvetch
Astragalus miser var. serotinus (Gray ex Cooper) Barneby
  timber milkvetch
Astragalus missouriensis Nutt.
  Missouri milkvetch
Astragalus missouriensis var. missouriensis Nutt.
  Missouri milkvetch
Astragalus molybdenus Barneby
  Leadville milkvetch
Astragalus oreganus Nutt.
  Oregon milkvetch
Astragalus pectinatus (Hook.) Dougl. ex G. Don
  narrowleaf milkvetch
Astragalus plattensis Nutt.
  Platte River milkvetch
Astragalus platytropis Gray
  broadkeel milkvetch
Astragalus purshii Dougl. ex Hook.
  woollypod milkvetch
Astragalus purshii var. concinnus Barneby
  concinnus milkvetch
Astragalus purshii var. purshii Dougl. ex Hook.
  Pursh's milkvetch
Astragalus racemosus Pursh
  alkali poisonvetch
Astragalus racemosus var. longisetus M.E. Jones
  alkali poisonvetch
Astragalus robbinsii (Oakes) Gray
  Robbins' milkvetch
Astragalus robbinsii var. minor (Hook.) Barneby
  Robbins' milkvetch
Astragalus scaphoides (M.E. Jones) Rydb.
  basalt milkvetch
Astragalus sericoleucus Gray
  silky milkvetch
Astragalus spatulatus Sheldon
  tufted milkvetch
Astragalus tenellus Pursh
  looseflower milkvetch
Astragalus terminalis S. Wats.
  railhead milkvetch
Astragalus vexilliflexus Sheldon
  bentflower milkvetch
Astragalus vexilliflexus var. vexilliflexus Sheldon
  bentflower milkvetch
Caragana arborescens Lam.
  Siberian peashrub
Coronilla varia L.
  purple crownvetch
Cytisus scoparius (L.) Link
  scotchbroom
Cytisus scoparius var. scoparius (L.) Link
  scotchbroom
Dalea candida Willd.
  slender white prairieclover
Dalea candida var. candida Willd.
  white prairieclover
Dalea candida var. oligophylla (Torr.) Shinners
  white prairieclover
Dalea enneandra Nutt.
  nineanther prairieclover
Dalea purpurea Vent.
  purple prairieclover
Dalea purpurea var. purpurea Vent.
  violet prairieclover
Dalea villosa (Nutt.) Spreng.
  silky prairieclover
Dalea villosa var. villosa (Nutt.) Spreng.
  silky prairieclover
Glycyrrhiza lepidota Pursh
  American licorice
Hedysarum alpinum L.
  alpine sweetvetch
Hedysarum alpinum var. americanum Michx.
  American alpine sweetvetch
Hedysarum boreale Nutt.
  northern sweetvetch
Hedysarum boreale ssp. boreale Nutt.
  boreal sweetvetch
Hedysarum boreale ssp. boreale var. boreale Nutt.
  boreal sweetvetch
Hedysarum boreale ssp. mackenziei (Richards.) Welsh
  Mackenzie's sweetvetch
Hedysarum occidentale Greene
  western sweetvetch
Hedysarum sulphurescens Rydb.
  white sweetvetch
Lathyrus bijugatus White
  drypark peavine
Lathyrus latifolius L.
  perennial peavine
Lathyrus ochroleucus Hook.
  cream peavine
Lathyrus tuberosus L.
  tuberous sweetpea
Lotus corniculatus L.
  birdfoot deervetch
Lotus tenuis Waldst. & Kit. ex Willd.
  narrowleaf birdsfoot trefoil
Lotus unifoliolatus (Hook.) Benth.
  American birdsfoot trefoil
Lotus unifoliolatus var. unifoliolatus (Hook.) Benth.
  prairie trefoil
Lupinus arbustus Dougl. ex Lindl.
  longspur lupine
Lupinus arbustus ssp. pseudoparviflorus (Rydb.) D. Dunn
  false lupine
Lupinus argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus var. argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus var. laxiflorus (Dougl. ex Lindl.) Dorn
  spur lupine
Lupinus burkei S. Wats.
  largeleaf lupine
Lupinus burkei ssp. burkei S. Wats.
  Burke's lupine
Lupinus caespitosus Nutt.
  stemless dwarf lupine
Lupinus caespitosus var. utahensis (S. Wats.) Cox
  Utah lupine
Lupinus caudatus Kellogg
  tailcup lupine
Lupinus depressus Rydb.
  depressed lupine
Lupinus leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus var. belliae C.P. Sm.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus var. leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus minimus Dougl. ex Hook.
  Kettle Falls lupine
Lupinus monticola Rydb.
  mountain lupine
Lupinus parviflorus Nutt. ex Hook. & Arn.
  lodgepole lupine
Lupinus parviflorus ssp. parviflorus Nutt. ex Hook. & Arn.
  lodgepole lupine
Lupinus plattensis S. Wats.
  Nebraska lupine
Lupinus polyphyllus Lindl.
  bigleaf lupine
Lupinus polyphyllus ssp. polyphyllus Lindl.
  bigleaf lupine
Lupinus pusillus Pursh
  rusty lupine
Lupinus pusillus ssp. pusillus Pursh
  rusty lupine
Lupinus sericeus Pursh
  silky lupine
Lupinus sericeus ssp. sericeus Pursh
  silky lupine
Lupinus sericeus ssp. sericeus var. sericeus Pursh
  silky lupine
Lupinus wyethii S. Wats.
  Wyeth's lupine
Lupinus wyethii ssp. wyethii S. Wats.
  Wyeth's lupine
Medicago lupulina L.
  black medick
Medicago polymorpha L.
  burclover
Medicago sativa L.
  alfalfa
Medicago sativa ssp. falcata (L.) Arcang.
  yellow alfalfa
Medicago sativa ssp. sativa L.
  alfalfa
Melilotus albus Medik.
  = Melilotus officinalis
Melilotus officinalis (L.) Lam.
  yellow sweetclover
Onobrychis viciifolia Scop.
  sainfoin
Oxytropis borealis DC.
Oxytropis borealis var. viscida (Nutt.) Welsh
Oxytropis campestris (L.) DC.
  cold mountain crazyweed
Oxytropis campestris var. columbiana (St. John) Barneby
  northern yellow locoweed
Oxytropis campestris var. cusickii (Greenm.) Barneby
  Cusick's crazyweed
Oxytropis deflexa (Pallas) DC.
  hangpod crazyweed
Oxytropis deflexa var. foliolosa (Hook.) Barneby
  pendantpod locoweed
Oxytropis deflexa var. sericea Torr. & Gray
  longstem hangpod crazyweed
Oxytropis lagopus Nutt.
  haresfoot pointloco
Oxytropis lagopus var. atropurpurea (Rydb.) Barneby
  haresfoot locoweed
Oxytropis lagopus var. conjugans Barneby
  haresfoot locoweed
Oxytropis lagopus var. lagopus Nutt.
  haresfoot locoweed
Oxytropis lambertii Pursh
  Lambert's crazyweed
Oxytropis monticola Gray
  yellowflower locoweed
Oxytropis nana Nutt.
  Wyoming locoweed
Oxytropis nana var. argophylla (Rydb.) Isely
  Montana crazyweed
Oxytropis nana var. besseyi (Rydb.) Isely
  Bessey's pointvetch
Oxytropis parryi Gray
  Parry's crazyweed
Oxytropis podocarpa Gray
  stalkedpod locoweed
Oxytropis riparia Litv.
  Ruby Valley pointvetch
Oxytropis sericea Nutt.
  silvery oxytrope
Oxytropis sericea var. sericea Nutt.
  silvery oxytrope
Oxytropis splendens Dougl. ex Hook.
  showy pointvetch
Oxytropis viscida var. viscida Nutt.
  sticky locoweed
Pediomelum argophyllum (Pursh) J. Grimes
  silverleaf scurfpea
Pediomelum cuspidatum (Pursh) Rydb.
  largebract Indian breadroot
Pediomelum esculentum (Pursh) Rydb.
  breadroot scurfpea
Pediomelum pentaphyllum (L.) Rydb.
  small Indian breadroot
Petalostemon 
  = Dalea 
Psoralea esculenta Pursh
  = Pediomelum esculentum
Psoralea lanceolata Pursh
  = Psoralidium lanceolatum
Psoralea pentaphylla L.
  = Pediomelum pentaphyllum
Psoralea tenuiflora Pursh
  = Psoralidium tenuiflorum
Psoralidium lanceolatum (Pursh) Rydb.
  lemon scurfpea
Psoralidium tenuiflorum (Pursh) Rydb.
  slimflower scurfpea
Robinia pseudoacacia L.
  black locust
Sarothamnus scoparius (L.) Wimmer ex Koch
  = Cytisus scoparius
Sphaerophysa salsula (Pallas) DC.
  alkali swainsonpea
Thermopsis gracilis T.J. Howell
Thermopsis gracilis var. gracilis T.J. Howell
Thermopsis gracilis var. ovata (B.L. Robins. ex Piper) M. Mendenhall
Thermopsis macrophylla Hook. & Arn.
  California goldenbanner
Thermopsis montana var. ovata (B.L. Robins. ex Piper) St. John
  = Thermopsis gracilis var. ovata
Thermopsis montana var. venosa (Eastw.) Jepson
  = Thermopsis gracilis var. gracilis
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards.
  prairie thermopsis
Thermopsis rhombifolia var. montana (Nutt.) Isely
  mountain thermopsis
Thermopsis rhombifolia var. rhombifolia (Nutt. ex Pursh) Nutt. ex Richards.
  prairie goldenbanner
Trifolium arvense L.
  rabbitfoot clover
Trifolium aureum Pollich
  golden clover
Trifolium beckwithii Brewer ex S. Wats.
  Beckwith's clover
Trifolium campestre Schreb.
  field clover
Trifolium cyathiferum Lindl.
  cup clover
Trifolium dasyphyllum Torr. & Gray
  alpine clover
Trifolium dasyphyllum ssp. uintense (Rydb.) J. Gillett
  Uinta clover
Trifolium dubium Sibthorp
  suckling clover
Trifolium eriocephalum Nutt.
  woollyhead clover
Trifolium eriocephalum ssp. arcuatum (Piper) J. Gillett
  woollyhead clover
Trifolium fragiferum L.
  strawberry clover
Trifolium gymnocarpon Nutt.
  hollyleaf clover
Trifolium gymnocarpon ssp. plummerae (S. Wats.) J. Gillett
  Plummer's clover
Trifolium haydenii Porter
  Hayden's clover
Trifolium haydenii var. haydenii Porter
  Hayden's clover
Trifolium hybridum L.
  alsike clover
Trifolium latifolium (Hook.) Greene
  twin clover
Trifolium longipes Nutt.
  longstalk clover
Trifolium longipes ssp. reflexum (A. Nels.) J. Gillett
  droopflower clover
Trifolium microcephalum Pursh
  smallhead clover
Trifolium nanum Torr.
  dwarf clover
Trifolium parryi Gray
  Parry's clover
Trifolium parryi ssp. montanense (Rydb.) J. Gillett
  Parry's clover
Trifolium pratense L.
  red clover
Trifolium repens L.
  white clover
Trifolium variegatum Nutt.
  whitetip 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 cracca L.
  bird vetch
Vicia sativa L.
  common vetch
Vicia tetrasperma (L.) Schreb.
  lentil vetch
Vicia tetrasperma var. tetrasperma (L.) Moench
  lentil vetch
Vicia villosa Roth
  winter vetch
Vicia villosa ssp. varia (Host) Corb.
  winter vetch
Vicia villosa ssp. villosa Roth
  winter vetch

LEMNACEAE
Lemna gibba L.
  swollen duckweed
Lemna minor L.
  common duckweed
Lemna trisulca L.
  star duckweed
Lemna turionifera Landolt
  turion duckweed
Spirodela polyrrhiza (L.) Schleid.
  common duckweed
Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi
  northern watermeal
Wolffia braziliensis Weddell
  Brazilian watermeal
Wolffia columbiana Karst.
  Columbian watermeal

LENTIBULARIACEAE
Pinguicula macroceras Link
  California butterwort
Utricularia intermedia Hayne
  flatleaf bladderwort
Utricularia macrorhiza Le Conte
  common bladderwort
Utricularia minor L.
  lesser bladderwort

LILIACEAE
Allium acuminatum Hook.
  tapertip onion
Allium brandegei S. Wats.
  Brandegee's onion
Allium brevistylum S. Wats.
  shortstyle onion
Allium canadense L.
  meadow garlic
Allium canadense var. fraseri Ownbey
  Fraser meadow garlic
Allium cernuum Roth
  nodding onion
Allium cernuum var. cernuum Roth
  nodding onion
Allium cernuum var. obtusum Cockerell ex J.F. Macbr.
  nodding onion
Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg
  Columbian onion
Allium fibrillum M.E. Jones
  Blue Mountain onion
Allium geyeri S. Wats.
  Geyer's onion
Allium geyeri var. tenerum M.E. Jones
  bulbil onion
Allium parvum Kellogg
  small onion
Allium schoenoprasum L.
  wild chives
Allium schoenoprasum var. sibiricum (L.) Hartman
  wild chives
Allium simillimum Henderson
  simil onion
Allium textile A. Nels. & J.F. Macbr.
  textile onion
Asparagus officinalis L.
  garden asparagus
Calochortus apiculatus Baker
  pointedtip Mariposa lily
Calochortus bruneaunis A. Nels. & J.F. Macbr.
  Bruneau Mariposa lily
Calochortus elegans Pursh
  northwestern Mariposa lily
Calochortus elegans var. selwayensis (St. John) Ownbey
  Selway Mariposa lily
Calochortus eurycarpus S. Wats.
  white Mariposa lily
Calochortus gunnisonii S. Wats.
  Gunnison's Mariposa lily
Calochortus gunnisonii var. gunnisonii S. Wats.
  Gunnison's Mariposa lily
Calochortus macrocarpus Dougl.
  sagebrush Mariposa lily
Calochortus macrocarpus var. macrocarpus Dougl.
  sagebrush Mariposa lily
Calochortus nuttallii Torr. & Gray
  sego lily
Camassia quamash (Pursh) Greene
  small camas
Camassia quamash ssp. quamash (Pursh) Greene
  small camas
Clintonia uniflora (Menzies ex J.A. & J.H. Schultes) Kunth
  bride's bonnet
Disporum hookeri (Torr.) Nichols.
  drops of gold
Disporum hookeri var. oreganum (S. Wats.) Q. Jones
  Oregon drops of gold
Disporum trachycarpum (S. Wats.) Benth. & Hook. f.
  roughfruit fairybells
Erythronium grandiflorum Pursh
  dogtooth lily
Erythronium grandiflorum ssp. candidum Piper
  yellow avalanchelily
Erythronium grandiflorum ssp. grandiflorum Pursh
  yellow avalanchelily
Fritillaria atropurpurea Nutt.
  spotted missionbells
Fritillaria pudica (Pursh) Spreng.
  yellow missionbells
Hemerocallis fulva (L.) L.
  orange daylily
Hemerocallis fulva var. fulva (L.) L.
  orange daylily
Leucocrinum montanum Nutt. ex Gray
  common starlily
Lilium philadelphicum L.
  wood lily
Lilium philadelphicum var. andinum (Nutt.) Ker-Gawl.
  wood lily
Lloydia serotina (L.) Reichenb.
  common alplily
Maianthemum canadense Desf.
  Canada beadruby
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 
  = Maianthemum 
Stenanthium occidentale Gray
  western stenanthium
Streptopus amplexifolius (L.) DC.
  claspleaf twistedstalk
Streptopus amplexifolius var. chalazatus Fassett
  tubercle twistedstalk
Tofieldia glutinosa (Michx.) Pers.
  glutin tofieldia
Tofieldia glutinosa ssp. montana C.L. Hitchc.
  tal tofieldia
Tofieldia pusilla (Michx.) Pers.
  Scotch false asphodel
Trillium ovatum Pursh
  Pacific trillium
Trillium ovatum ssp. ovatum Pursh
  Pacific trillium
Triteleia grandiflora Lindl.
  wild hyacinth
Veratrum californicum Dur.
  California false hellebore
Veratrum californicum var. californicum Dur.
  California false hellebore
Veratrum viride Ait.
  American false hellebore
Xerophyllum tenax (Pursh) Nutt.
  common beargrass
Zigadenus elegans Pursh
  mountain deathcamas
Zigadenus elegans ssp. elegans Pursh
  mountain deathcamas
Zigadenus paniculatus (Nutt.) S. Wats.
  foothill deathcamas
Zigadenus venenosus S. Wats.
  meadow deathcamas
Zigadenus venenosus var. gramineus (Rydb.) Walsh ex M.E. Peck
  grassy deathcamas

LIMNANTHACEAE
Floerkea proserpinacoides Willd.
  false mermaidweed

LINACEAE
Linum australe Heller
  southern flax
Linum australe var. australe Heller
  southern flax
Linum compactum A. Nels.
  Wyoming flax
Linum lewisii Pursh
  prairie flax
Linum lewisii var. lewisii Pursh
  Lewis' 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 decapetala (Pursh ex Sims) Urban & Gilg ex Gilg
  tenpetal blazingstar
Mentzelia dispersa S. Wats.
  bushy blazingstar
Mentzelia dispersa var. compacta (A. Nels.) J.F. Macbr.
  Nevada blazingstar
Mentzelia dispersa var. dispersa S. Wats.
  bushy blazingstar
Mentzelia laevicaulis (Dougl. ex Hook.) Torr. & Gray
  smoothstem blazingstar
Mentzelia laevicaulis var. laevicaulis (Dougl. ex Hook.) Torr. & Gray
  smoothstem blazingstar
Mentzelia montana (A. Davids.) A. Davids.
  variegatedbract blazingstar
Mentzelia nuda (Pursh) Torr. & Gray
  bractless blazingstar
Mentzelia nuda var. stricta (Osterhout) Harrington
  bractless blazingstar
Mentzelia pumila Nutt. ex Torr. & Gray
  dwarf mentzelia
Mentzelia pumila var. pumila Nutt. ex Torr. & Gray
  dwarf mentzelia
Mentzelia veatchiana Kellogg
  whitestem blazingstar

LYCOPODIACEAE
Diphasiastrum 
  = Lycopodium 
Huperzia selago (L.) Bernh. ex Mart. & Schrank
  fir clubmoss
Huperzia selago var. densa Trevisan
  fir clubmoss
Huperzia selago var. selago (L.) Bernh. ex Mart. & Schrank
  fir clubmoss
Lycopodiella inundata (L.) Holub
  inundated clubmoss
Lycopodium alpinum L.
  alpine clubmoss
Lycopodium annotinum L.
  stiff clubmoss
Lycopodium clavatum L.
  running clubmoss
Lycopodium clavatum var. clavatum L.
  running clubmoss
Lycopodium complanatum L.
  groundcedar
Lycopodium dendroideum Michx.
  tree groundpine
Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen
Lycopodium obscurum L.
  rare clubmoss
Lycopodium sitchense Rupr.
  Sitka clubmoss

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

MALVACEAE
Abutilon theophrasti Medik.
  velvetleaf
Alcea rosea L.
  hollyhock
Althaea rosea (L.) Cav.
  = Alcea rosea
Hibiscus trionum L.
  flower of an hour
Iliamna rivularis (Dougl. ex Hook.) Greene
  streambank globemallow
Iliamna rivularis var. diversa (A. Nels.) Wiggins
  streambank wildhollyhock
Iliamna rivularis var. rivularis (Dougl. ex Hook.) Greene
  streambank wildhollyhock
Malva moschata L.
  musk mallow
Malva neglecta Wallr.
  common mallow
Malva nicaeensis All.
  bull mallow
Malva parviflora L.
  cheeseweed mallow
Malva sylvestris L.
  high mallow
Sidalcea oregana (Nutt. ex Torr. & Gray) Gray
  Oregon checkermallow
Sidalcea oregana ssp. oregana (Nutt. ex Torr. & Gray) Gray
  Oregon checkermallow
Sidalcea oregana ssp. oregana var. procera C.L. Hitchc.
  Oregon checkermallow
Sphaeralcea coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea munroana (Dougl. ex Lindl.) Spach ex Gray
  Munro's globemallow
Sphaeralcea munroana ssp. munroana (Dougl. ex Lindl.) Spach ex Gray
  Munro's globemallow

MARSILEACEAE
Marsilea oligospora Goodding
  Pacific waterclover
Marsilea vestita Hook. & Grev.
  hairy pepperwort

MENYANTHACEAE
Menyanthes trifoliata L.
  common buckbean

MONOTROPACEAE
Allotropa virgata Torr. & Gray ex Gray
  sugarstick
Monotropa hypopithys L.
  pinesap
Monotropa uniflora L.
  Indianpipe
Pterospora andromedea Nutt.
  woodland pinedrops

NAJADACEAE
Najas flexilis (Willd.) Rostk. & Schmidt
  nodding waternymph
Najas guadalupensis (Spreng.) Magnus
  southern waternymph
Najas guadalupensis var. guadalupensis (Spreng.) Magnus
  Guadalupe waternymph

NYCTAGINACEAE
Abronia fragrans Nutt. ex Hook.
  snowball sand verbena
Mirabilis hirsuta (Pursh) MacM.
  hairy four o'clock
Mirabilis linearis (Pursh) Heimerl
  narrowleaf four o'clock
Mirabilis nyctaginea (Michx.) MacM.
  heartleaf four o'clock
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 lutea ssp. variegata (Dur.) E.O. Beal
  varigated yellow pondlily
Nuphar polysepala Engelm.
  = Nuphar lutea ssp. polysepala
Nymphaea odorata Ait.
  American white waterlily
Nymphaea tetragona Georgi
  pygmy waterlily

OLEACEAE
Fraxinus pennsylvanica Marsh.
  green ash

ONAGRACEAE
Boisduvalia 
  = Epilobium 
Calylophus serrulatus (Nutt.) Raven
  yellow sundrops
Camissonia andina (Nutt.) Raven
  sundrops eveningprimrose
Camissonia breviflora (Torr. & Gray) Raven
  fewflower eveningprimrose
Camissonia minor (A. Nels.) Raven
  small eveningprimrose
Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven
  barestem eveningprimrose
Camissonia scapoidea ssp. brachycarpa (Raven) Raven
  Paiute suncup
Camissonia subacaulis (Pursh) Raven
  diffuseflower eveningprimrose
Chamaenerion angustifolium (L.) Scop.
  = Epilobium angustifolium ssp. angustifolium
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
Clarkia pulchella Pursh
  pinkfairies
Clarkia rhomboidea Dougl. ex Hook.
  diamond fairyfan
Epilobium anagallidifolium Lam.
  alpine willowherb
Epilobium angustifolium L.
  fireweed
Epilobium angustifolium ssp. 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 densiflorum (Lindl.) Hoch & Raven
Epilobium foliosum (Torr. & Gray) Suksdorf
  California willowherb
Epilobium glaberrimum Barbey
  smooth willowweed
Epilobium glaberrimum ssp. fastigiatum (Nutt.) Hoch & Raven
  smooth willowweed
Epilobium halleanum Hausskn.
  glandular willowherb
Epilobium hornemannii Reichenb.
  Hornemann's willowherb
Epilobium latifolium L.
  dwarf fireweed
Epilobium leptophyllum Raf.
  bog willowherb
Epilobium minutum Lindl. ex Lehm.
  small willowweed
Epilobium oregonense Hausskn.
  slimstem willowweed
Epilobium palustre L.
  marsh willowherb
Epilobium pygmaeum (Speg.) Hoch & Raven
Epilobium saximontanum Hausskn.
  Rocky Mountain willowherb
Epilobium suffruticosum Nutt.
  shrub willowherb
Gaura coccinea Nutt. ex Pursh
  scarlet beeblossom
Gaura parviflora Dougl. ex Lehm.
  velvetweed
Gayophytum decipiens Lewis & Szweykowski
  deceptive groundsmoke
Gayophytum diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum diffusum ssp. diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum diffusum ssp. parviflorum Lewis & Szweykowski
  spreading groundsmoke
Gayophytum humile Juss.
  dwarf groundsmoke
Gayophytum racemosum Torr. & Gray
  blackfoot groundsmoke
Gayophytum ramosissimum Torr. & Gray
  pinyon groundsmoke
Oenothera albicaulis Pursh
  whitest eveningprimrose
Oenothera cespitosa Nutt.
  tufted eveningprimrose
Oenothera cespitosa ssp. cespitosa Nutt.
  tufted eveningprimrose
Oenothera elata Kunth
  Hooker's eveningprimrose
Oenothera flava (A. Nels.) Garrett
  yellow eveningprimrose
Oenothera nuttallii Sweet
  Nuttall's eveningprimrose
Oenothera pallida Lindl.
  pale eveningprimrose
Oenothera pallida ssp. pallida Lindl.
  pale eveningprimrose
Oenothera perennis L.
  small eveningprimrose
Oenothera villosa Thunb.
  hairy eveningprimrose
Oenothera villosa ssp. villosa Thunb.
  hairy eveningprimrose

OPHIOGLOSSACEAE
Botrychium ascendens W.H. Wagner
  trianglelobe moonwort
Botrychium crenulatum W.H. Wagner
  scalloped moonwort
Botrychium hesperium (Maxon & Clausen) W.H. Wagner & Lellinger
  western moonwort
Botrychium lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lanceolatum var. lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lunaria (L.) Sw.
  common moonwort
Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex Koch
  matricary grapefern
Botrychium minganense Victorin
  Mingan moonwort
Botrychium montanum W.H. Wagner
  mountain moonwort
Botrychium multifidum (Gmel.) Trev.
  leathery grapefern
Botrychium paradoxum W.H. Wagner
  peculiar moonwort
Botrychium pinnatum St. John
  northern moonwort
Botrychium spathulatum W.H. Wagner
  spathulate botrychium
Botrychium virginianum (L.) Sw.
  rattlesnake fern
Ophioglossum pusillum Raf.
  northern adderstongue

ORCHIDACEAE
Amerorchis rotundifolia (Banks ex Pursh) Hulten
  roundleaf orchid
Calypso bulbosa (L.) Oakes
  fairyslipper orchid
Calypso bulbosa var. americana (R. Br. ex Ait. f.) Luer
  fairyslipper orchid
Coeloglossum viride (L.) Hartman
  longbract frog orchid
Coeloglossum viride var. virescens (Muhl. ex Willd.) Luer
  longbract frog orchid
Coeloglossum viride var. viride (L.) Hartman
  longbract frog orchid
Corallorrhiza maculata (Raf.) Raf.
  summer coralroot
Corallorrhiza mertensiana Bong.
  Pacific coralroot
Corallorrhiza striata Lindl.
  hooded coralroot
Corallorrhiza striata var. striata Lindl.
  hooded coralroot
Corallorrhiza trifida Chatelain
  yellow coralroot
Corallorrhiza wisteriana Conrad
  spring coralroot
Cypripedium fasciculatum Kellogg ex S. Wats.
  clustered lady's slipper
Cypripedium montanum Dougl. ex Lindl.
  mountain lady's slipper
Cypripedium parviflorum Salisb.
  lesser yellow lady's slipper
Cypripedium passerinum Richards.
  sparrowegg lady's slipper
Epipactis gigantea Dougl. ex Hook.
  giant helleborine
Epipactis helleborine (L.) Crantz
  helleborine
Goodyera oblongifolia Raf.
  western rattlesnake plantain
Goodyera repens (L.) R. Br. ex Ait. f.
  lesser rattlesnake plantain
Habenaria .
  = Platanthera 
Habenaria unalascensis (Spreng.) S. Wats.
  = Piperia unalascensis
Habenaria viridis (L.) R. Br. ex Ait. f.
  = Coeloglossum viride var. viride
Limnorchis 
  = Platanthera 
Listera borealis Morong
  northern twayblade
Listera caurina Piper
  northwestern twayblade
Listera convallarioides (Sw.) Nutt. ex Ell.
  broadlipped twayblade
Listera cordata (L.) R. Br. ex Ait. f.
  heartleaf twayblade
Piperia elegans (Lindl.) Rydb.
  hillside bogorchid
Piperia unalascensis (Spreng.) Rydb.
  Alaska rein orchid
Platanthera dilatata (Pursh) Lindl. ex Beck
  boreal bog orchid
Platanthera dilatata var. albiflora (Cham.) Ledeb.
  scentbottle
Platanthera dilatata var. dilatata (Pursh) Lindl. ex Beck
  scentbottle
Platanthera hyperborea (L.) Lindl.
  northern green orchid
Platanthera hyperborea var. gracilis (Lindl.) Luer
  northern green orchid
Platanthera hyperborea var. hyperborea (L.) Lindl.
  northern green orchid
Platanthera leucostachys Lindl.
  bog orchid
Platanthera obtusata (Banks ex Pursh) Lindl.
  blunt bog orchid
Platanthera orbiculata (Pursh) Lindl.
  large roundleaved orchid
Platanthera orbiculata var. orbiculata (Pursh) Lindl.
  large roundleaved orchid
Platanthera sparsiflora (S. Wats.) Schlechter
  canyon bog orchid
Platanthera sparsiflora var. sparsiflora (S. Wats.) Schlechter
  canyon bog orchid
Platanthera stricta Lindl.
  Modoc bog orchid
Spiranthes romanzoffiana Cham.
  hooded ladiestresses

OROBANCHACEAE
Orobanche corymbosa (Rydb.) Ferris
  flattop broomrape
Orobanche fasciculata Nutt.
  clustered broomrape
Orobanche ludoviciana Nutt.
  Louisiana broomrape
Orobanche ludoviciana ssp. ludoviciana Nutt.
  sand broomrape
Orobanche uniflora L.
  oneflowered broomrape

OXALIDACEAE
Oxalis corniculata L.
  creeping woodsorrel
Oxalis dillenii Jacq.
  Dillen's oxalis

PAEONIACEAE
Paeonia brownii Dougl. ex Hook.
  Brown's peony

PAPAVERACEAE
Argemone polyanthemos (Fedde) G.B. Ownbey
  crested pricklypoppy
Glaucium corniculatum (L.) J.H. Rudolph
  blackspot hornpoppy
Papaver argemone L.
  long pricklyhead poppy
Papaver lapponicum (Tolm.) Nordh.
  Arctic poppy
Papaver lapponicum ssp. occidentale (Lundstr.) Knaben
  Lapland poppy
Papaver pygmaeum Rydb.
  pygmy poppy
Papaver rhoeas L.
  corn poppy

PINACEAE
Abies grandis (Dougl. ex D. Don) Lindl.
  grand fir
Abies lasiocarpa (Hook.) Nutt.
  subalpine fir
Abies lasiocarpa var. lasiocarpa (Hook.) Nutt.
  subalpine fir
Larix lyallii Parl.
  subalpine larch
Larix occidentalis Nutt.
  western larch
Picea engelmannii Parry ex Engelm.
  Engelmann's spruce
Picea glauca (Moench) Voss
  white spruce
Pinus albicaulis Engelm.
  whitebark pine
Pinus contorta Dougl. ex Loud.
  lodgepole pine
Pinus contorta var. latifolia Engelm. ex S. Wats.
  tall lodgepole pine
Pinus flexilis James
  limber pine
Pinus monticola Dougl. ex D. Don
  western white pine
Pinus ponderosa P.& C. Lawson
  ponderosa pine
Pinus ponderosa var. scopulorum Engelm.
  ponderosa pine
Pseudotsuga menziesii (Mirbel) Franco
  Douglas fir
Pseudotsuga menziesii var. glauca (Beissn.) Franco
  Rocky Mountain Douglas fir
Tsuga heterophylla (Raf.) Sarg.
  western hemlock
Tsuga mertensiana (Bong.) Carr.
  mountain hemlock

PLANTAGINACEAE
Plantago aristata Michx.
  largebracted plantain
Plantago australis Lam.
  Mexican plantain
Plantago australis ssp. hirtella (Kunth) Rahn
  Mexican plantain
Plantago canescens M.F. Adams
  gray pubescent plantain
Plantago elongata Pursh
  longleaf plantain
Plantago elongata ssp. elongata Pursh
  prairie plantain
Plantago eriopoda Torr.
  redwool plantain
Plantago lanceolata L.
  narrowleaf plantain
Plantago major L.
  common plantain
Plantago major var. major L.
  common plantain
Plantago major var. pachyphylla Pilger
  thickleaf plantain
Plantago patagonica Jacq.
  woolly plantain
Plantago rugelii Dcne.
  blackseed plantain
Plantago tweedyi Gray
  Tweedy's plantain

POLEMONIACEAE
Collomia debilis (S. Wats.) Greene
  alpine mountaintrumpet
Collomia debilis var. camporum Payson
  alpine mountaintrumpet
Collomia debilis var. debilis (S. Wats.) Greene
  alpine mountaintrumpet
Collomia grandiflora Dougl. ex Lindl.
  largeflower mountaintrumpet
Collomia linearis Nutt.
  narrowleaf mountaintrumpet
Collomia tinctoria Kellogg
  yellowstaining mountaintrumpet
Gilia inconspicua (Sm.) Sweet
  shy gilia
Gilia leptomeria Gray
  sand gilia
Gilia tenerrima Gray
  delicate gilia
Gilia tweedyi Rydb.
  Tweedy's gila
Ipomopsis aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis aggregata ssp. aggregata (Pursh) V. Grant
  skyrocket 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 pumila (Nutt.) V. Grant
  dwarf gilia
Ipomopsis spicata (Nutt.) V. Grant
  spiked gilia
Ipomopsis spicata ssp. capitata (Gray) V. Grant
  spiked gilia
Leptodactylon caespitosum Nutt.
  mat pricklygilia
Leptodactylon pungens (Torr.) Torr. ex Nutt.
  granite 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 divaricata (Torr. ex Gray) Greene
  divaricate navarretia
Navarretia divaricata ssp. divaricata (Torr. ex Gray) Greene
  divaricate navarretia
Navarretia intertexta (Benth.) Hook.
  needleleaf navarretia
Navarretia intertexta ssp. propinqua (Suksdorf) Day
  near navarretia
Navarretia leucocephala Benth.
  whitehead navarretia
Navarretia leucocephala ssp. minima (Nutt.) Day
  least navarretia
Navarretia squarrosa (Eschsch.) Hook. & Arn.
  skunkbush
Phlox albomarginata M.E. Jones
  lostriver phlox
Phlox albomarginata ssp. albomarginata M.E. Jones
  whitemargin phlox
Phlox alyssifolia Greene
  alyssumleaf phlox
Phlox alyssifolia ssp. collina (Rydb.) Wherry
  alyssumleaf phlox
Phlox andicola E. Nels.
  prairie phlox
Phlox caespitosa Nutt.
  tufted phlox
Phlox diffusa Benth.
  spreading phlox
Phlox diffusa ssp. longistylis Wherry
  spreading phlox
Phlox diffusa ssp. scleranthifolia (Rydb.) Wherry
  spreading phlox
Phlox gracilis (Hook.) Greene
  slender phlox
Phlox gracilis ssp. gracilis (Hook.) Greene
  slender phlox
Phlox gracilis ssp. humilis (Greene) Mason
  dwarf phlox
Phlox hoodii Richards.
  spiny phlox
Phlox hoodii ssp. canescens (Torr. & Gray) Wherry
  carpet phlox
Phlox hoodii ssp. hoodii Richards.
  Hood's phlox
Phlox hoodii ssp. muscoides (Nutt.) Wherry
  musk phlox
Phlox hoodii ssp. viscidula (Wherry) Wherry
  carpet phlox
Phlox kelseyi Britt.
  Kelsey's phlox
Phlox kelseyi ssp. kelseyi Britt.
  Kelsey's phlox
Phlox longifolia Nutt.
  longleaf phlox
Phlox longifolia ssp. longifolia Nutt.
  longleaf phlox
Phlox missoulensis Wherry
  Missoula phlox
Phlox multiflora A. Nels.
  flowery phlox
Phlox multiflora ssp. depressa (E. Nels.) Wherry
  Rocky Mountain phlox
Phlox multiflora ssp. multiflora A. Nels.
  flowery phlox
Phlox multiflora ssp. patula (A. Nels.) Wherry
  Rocky Mountain phlox
Phlox pulvinata (Wherry) Cronq.
  cushion phlox
Phlox speciosa Pursh
  showy phlox
Phlox speciosa ssp. occidentalis (Dur. ex Torr.) Wherry
  showy phlox
Polemonium micranthum Benth.
  annual polemonium
Polemonium occidentale Greene
  western polemonium
Polemonium occidentale ssp. occidentale Greene
  western polemonium
Polemonium pulcherrimum Hook.
  skunkleaf polemonium
Polemonium pulcherrimum ssp. pulcherrimum Hook.
  pretty Jacobsladder
Polemonium viscosum Nutt.
  sticky polemonium

POLYGALACEAE
Polygala alba Nutt.
  white milkwort
Polygala verticillata L.
  whorled milkwort

POLYGONACEAE
Eriogonum androsaceum Benth.
  rockjasmine buckwheat
Eriogonum annuum Nutt.
  annual buckwheat
Eriogonum brevicaule Nutt.
  shortstem buckwheat
Eriogonum brevicaule var. brevicaule Nutt.
  shortstem buckwheat
Eriogonum brevicaule var. laxifolium (Torr. & Gray) Reveal
  shortstem buckwheat
Eriogonum caespitosum Nutt.
  matted buckwheat
Eriogonum capistratum Reveal
  hidden buckwheat
Eriogonum capistratum var. muhlickii Reveal
  Muhlick's buckwheat
Eriogonum cernuum Nutt.
  nodding buckwheat
Eriogonum cernuum var. cernuum Nutt.
  nodding buckwheat
Eriogonum effusum Nutt.
  spreading buckwheat
Eriogonum effusum var. rosmarinoides Benth.
  spreading buckwheat
Eriogonum flavum Nutt.
  yellow eriogonum
Eriogonum flavum var. flavum Nutt.
  alpine golden buckwheat
Eriogonum flavum var. piperi (Greene) M.E. Jones
  Piper's golden buckwheat
Eriogonum flavum var. polyphyllum (Small ex Rydb.) M.E. Jones
  alpine golden buckwheat
Eriogonum heracleoides Nutt.
  parsnipflower buckwheat
Eriogonum heracleoides var. heracleoides Nutt.
  parsnipflower buckwheat
Eriogonum lagopus Rydb.
  parasol buckwheat
Eriogonum mancum Rydb.
  imperfect 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 ovalifolium var. depressum Blank.
  cushion buckwheat
Eriogonum ovalifolium var. ochroleucum (Small ex Rydb.) M.E. Peck
  cushion buckwheat
Eriogonum ovalifolium var. ovalifolium Nutt.
  cushion buckwheat
Eriogonum ovalifolium var. pansum Reveal
  cushion buckwheat
Eriogonum ovalifolium var. purpureum (Nutt.) Dur.
  cushion buckwheat
Eriogonum pauciflorum Pursh
  fewflower buckwheat
Eriogonum pauciflorum var. gnaphalodes (Benth.) Reveal
  fewflower buckwheat
Eriogonum pauciflorum var. pauciflorum Pursh
  fewflower buckwheat
Eriogonum pyrolifolium Hook.
  Shasta buckwheat
Eriogonum pyrolifolium var. coryphaeum Torr. & Gray
  Shasta buckwheat
Eriogonum sphaerocephalum Dougl. ex Benth.
  rock buckwheat
Eriogonum strictum Benth.
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum (Torr. & Gray) S. Stokes
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum var. proliferum (Torr. & Gray) C.L. Hitchc.
  Blue Mountain buckwheat
Eriogonum umbellatum Torr.
  sulphur wildbuckwheat
Eriogonum umbellatum var. aureum (Gandog.) Reveal
  sulphurflower buckwheat
Eriogonum umbellatum var. dichrocephalum Gandog.
  sulphurflower buckwheat
Eriogonum umbellatum var. majus Hook.
  sulphurflower buckwheat
Eriogonum umbellatum var. stellatum (Benth.) M.E. Jones
  sulphurflower buckwheat
Eriogonum umbellatum var. umbellatum Torr.
  sulphurflower 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 amphibium var. stipulaceum Coleman
  water smartweed
Polygonum arenastrum Jord. ex Boreau
  ovalleaf knotweed
Polygonum aviculare L.
  prostrate knotweed
Polygonum bistortoides Pursh
  American bistort
Polygonum buxiforme Small
  box knotweed
Polygonum convolvulus L.
  black bindweed
Polygonum douglasii Greene
  Douglas' knotweed
Polygonum douglasii ssp. austiniae (Greene) E. Murr.
  Austin knotweed
Polygonum douglasii ssp. douglasii Greene
  Douglas' knotweed
Polygonum douglasii ssp. engelmannii (Greene) Kartesz & Gandhi
  Engelmann's knotweed
Polygonum douglasii ssp. johnstonii (Munz) Hickman
  Johnston's knotweed
Polygonum douglasii ssp. majus (Meisn.) Hickman
  large knotweed
Polygonum douglasii ssp. spergulariiforme (Meisn. ex Small) Hickman
  scatter knotweed
Polygonum erectum L.
  erect knotweed
Polygonum hydropiper L.
  marshpepper knotweed
Polygonum lapathifolium L.
  curlytop knotweed
Polygonum lapathifolium var. lapathifolium L.
  curlytop knotweed
Polygonum lapathifolium var. salicifolium Sibthorp
  curlytop knotweed
Polygonum leptocarpum B.L. Robins.
  narrowpoint knotweed
Polygonum minimum S. Wats.
  broadleaf knotweed
Polygonum pensylvanicum L.
  Pennsylvania smartweed
Polygonum persicaria L.
  spotted ladysthumb
Polygonum phytolaccifolium Meisn. ex Small
  poke knotweed
Polygonum polygaloides Wallich ex Meisn.
  polygala knotweed
Polygonum polygaloides ssp. confertiflorum (Nutt. ex Piper) Hickman
  fruitleaf knotweed
Polygonum polygaloides ssp. kelloggii (Greene) Hickman
  Kellogg's knotweed
Polygonum polygaloides ssp. polygaloides Wallich ex Meisn.
  fruitleaf knotweed
Polygonum punctatum Ell.
  dotted smartweed
Polygonum punctatum var. confertiflorum (Meisn.) Fassett
  dotted smartweed
Polygonum ramosissimum Michx.
  bushy knotweed
Polygonum viviparum L.
  alpine bistort
Rumex acetosa L.
  garden sorrel
Rumex acetosella L.
  common sheep sorrel
Rumex aquaticus L.
  western dock
Rumex aquaticus var. fenestratus (Greene) Dorn
  western dock
Rumex crispus L.
  curly dock
Rumex maritimus L.
  golden dock
Rumex obtusifolius L.
  bitter dock
Rumex patientia L.
  patience dock
Rumex paucifolius Nutt.
  fewleaved dock
Rumex paucifolius ssp. paucifolius Nutt.
  fewleaved dock
Rumex salicifolius Weinm.
  willow dock
Rumex salicifolius var. denticulatus Torr.
  toothed willow dock
Rumex salicifolius var. mexicanus (Meisn.) C.L. Hitchc.
  Mexican dock
Rumex stenophyllus Ledeb.
  narrowleaf dock
Rumex venosus Pursh
  veiny dock

POLYPODIACEAE
Polypodium hesperium Maxon
  western polypody

PONTEDERIACEAE
Heteranthera dubia (Jacq.) MacM.
  grassleaf mudplantain

PORTULACACEAE
Cistanthe umbellata (Torr.) Hershkovitz
  Mt. Hood pussypaws
Claytonia cordifolia S. Wats.
  heartleaf springbeauty
Claytonia lanceolata Pursh
  lanceleaf springbeauty
Claytonia lanceolata var. flava (A. Nels.) C.L. Hitchc.
  lanceleaf springbeauty
Claytonia lanceolata var. lanceolata Pursh
  lanceleaf springbeauty
Claytonia lanceolata var. multiscapa (Rydb.) C.L. Hitchc.
  lanceleaf springbeauty
Claytonia megarhiza (Gray) Parry ex S. Wats.
  alpine springbeauty
Claytonia megarhiza var. megarhiza (Gray) Parry ex S. Wats.
  alpine springbeauty
Claytonia parviflora Dougl. ex Hook.
  streambank springbeauty
Claytonia perfoliata Donn ex Willd.
  miner's lettuce
Claytonia sibirica L.
  Siberian springbeauty
Claytonia sibirica var. sibirica L.
  Siberian springbeauty
Lewisia columbiana (T.J. Howell ex Gray) B.L. Robins.
  Columbian bitterroot
Lewisia columbiana var. columbiana (T.J. Howell ex Gray) B.L. Robins.
  Columbian bitterroot
Lewisia columbiana var. wallowensis C.L. Hitchc.
  Wallowa lewisia
Lewisia nevadensis (Gray) B.L. Robins.
  Nevada bitterroot
Lewisia pygmaea (Gray) B.L. Robins.
  pigmy bitterroot
Lewisia rediviva Pursh
  Oregon bitterroot
Lewisia rediviva var. rediviva Pursh
  Oregon bitterroot
Lewisia triphylla (S. Wats.) B.L. Robins.
  threeleaf lewisia
Montia chamissoi (Ledeb. ex Spreng.) Greene
  water minerslettuce
Montia dichotoma (Nutt.) T.J. Howell
  dwarf minerslettuce
Montia linearis (Dougl. ex Hook.) Greene
  narrowleaf minerslettuce
Montia parvifolia (Moc. ex DC.) Greene
  littleleaf minerslettuce
Montia parvifolia ssp. parvifolia (Moc. ex DC.) Greene
  littleleaf minerslettuce
Portulaca oleracea L.
  little hogweed
Talinum calycinum Engelm.
  largeflower fameflower

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 filiformis var. alpinus (Blytt) Aschers. & Graebn.
  fineleaf pondweed
Potamogeton foliosus Raf.
  leafy pondweed
Potamogeton foliosus var. fibrillosus (Fern.) Haynes & Reveal
  leafy pondweed
Potamogeton foliosus var. foliosus Raf.
  leafy pondweed
Potamogeton friesii Rupr.
  Fries' pondweed
Potamogeton gramineus L.
  variableleaf pondweed
Potamogeton illinoensis Morong
  Illinois pondweed
Potamogeton natans L.
  floating pondweed
Potamogeton nodosus Poir.
  longleaf pondweed
Potamogeton obtusifolius Mert. & Koch
  bluntleaf 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