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

ACANTHACEAE
Beloperone californica Benth.
  = Justicia californica
Carlowrightia arizonica Gray
  Arizona wrightwort
Justicia californica (Benth.) D. Gibson
  beloperone

ACERACEAE
Acer circinatum Pursh
  vine maple
Acer glabrum Torr.
  Rocky Mountain maple
Acer glabrum var. diffusum (Greene) Smiley
  Rocky Mountain maple
Acer glabrum var. greenei Keller
  Greene's maple
Acer glabrum var. glabrum Torr.
  Rocky Mountain maple
Acer glabrum var. torreyi (Greene) Smiley
  Torrey maple
Acer macrophyllum Pursh
  bigleaf maple
Acer negundo L.
  boxelder
Acer negundo var. californicum (Torr. & Gray) Sarg.
  California boxelder

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

AGAVACEAE
Agave americana L.
  American century plant
Agave deserti Engelm.
  desert agave
Agave deserti ssp. deserti Engelm.
  desert agave
Agave deserti ssp. simplex Gentry
  desert agave
Agave shawii Engelm.
  coastal agave
Agave utahensis Engelm.
  Utah agave
Agave utahensis var. eborispina (Hester) Breitung
  Utah agave
Agave utahensis var. nevadensis Engelm. ex Greenm. & Roush
  Nevada agave
Nolina bigelovii (Torr.) S. Wats.
  Bigelow's nolina
Nolina bigelovii var. bigelovii (Torr.) S. Wats.
  Bigelow's nolina
Nolina interrata Gentry
  Dehesa beargrass
Nolina parryi S. Wats.
Yucca baccata Torr.
  banana yucca
Yucca baccata var. baccata Torr.
  banana yucca
Yucca brevifolia Engelm.
  Joshua tree
Yucca brevifolia var. brevifolia Engelm.
  Joshua tree
Yucca brevifolia var. jaegeriana McKelvey
  Jaeger's Joshua tree
Yucca schidigera Roezl ex Ortgies
  Mojave yucca
Yucca whipplei Torr.
  chaparral yucca
Yucca whipplei var. caespitosa M.E. Jones
  chaparral yucca
Yucca whipplei var. whipplei Torr.
  chaparral yucca

AIZOACEAE
Aptenia cordifolia (L. f.) Schwant.
  heartleaf iceplant
Carpobrotus aequilateralus (Haw.) N.E. Br.
  baby sunrose
Carpobrotus edulis (L.) N.E. Br.
  common hottentot fig
Cypselea humifusa Turp.
  panal
Disphyma crassifolium (L.) L. Bolus
  dewplant
Drosanthemum floribundum (Haw.) Schwant.
  showy dewflower
Drosanthemum speciosum (Haw.) Schwant.
  royal dewflower
Herrea elongata (Haw.) L. Bolus
  false iceplant
Lampranthus coccineus (Haw.) N.E. Br.
  redflush
Malephora crocea (Jacq.) Schwant.
  coppery mesemb
Mesembryanthemum cordifolium L. f.
  = Aptenia cordifolia
Mesembryanthemum coccineum Haw.
  = Lampranthus coccineus
Mesembryanthemum crystallinum L.
  common iceplant
Mesembryanthemum crassifolium L.
  = Disphyma crassifolium
Mesembryanthemum edule L.
  = Carpobrotus edulis
Mesembryanthemum elongatum Haw.
  = Herrea elongata
Mesembryanthemum floribundum Haw.
  = Drosanthemum floribundum
Mesembryanthemum nodiflorum L.
  slenderleaf iceplant
Sesuvium verrucosum Raf.
  verrucose seapurslane
Tetragonia tetragonioides (Pallas) Kuntze
  New Zealand spinach
Trianthema portulacastrum L.
  desert horsepurslane

ALISMATACEAE
Alisma gramineum Lej.
  narrowleaf water plantain
Alisma lanceolatum Withering
  lanceleaf water plantain
Alisma plantago-aquatica var. americanum J.A. Schultes
  = Alisma triviale
Alisma subcordatum Raf.
  American water plantain
Alisma triviale Pursh
  northern water plantain
Echinodorus berteroi (Spreng.) Fassett
  upright burrhead
Machaerocarpus californicus (Torr. ex Benth.) Small
  California damsonium
Sagittaria calycina Engelm.
  hooded arrowhead
Sagittaria calycina var. calycina Engelm.
  hooded arrowhead
Sagittaria cuneata Sheldon
  arumleaf arrowhead
Sagittaria latifolia Willd.
  broadleaf arrowhead
Sagittaria latifolia var. latifolia Willd.
  broadleaf arrowhead
Sagittaria longiloba Engelm. ex J.G. Sm.
  longbarb arrowhead
Sagittaria sanfordii Greene
  valley arrowhead

AMARANTHACEAE
Alternanthera caracasana Kunth
  washerwoman
Alternanthera philoxeroides (Mart.) Griseb.
  alligatorweed
Alternanthera pungens Kunth
  khakiweed
Amaranthus albus L.
  prostrate pigweed
Amaranthus arenicola I.M. Johnston
  sandhill amaranth
Amaranthus blitoides S. Wats.
  mat amaranth
Amaranthus californicus (Moq.) S. Wats.
  California amaranth
Amaranthus caudatus L.
  love-lies-bleeding
Amaranthus cruentus L.
  red amaranth
Amaranthus deflexus L.
  largefruit amaranth
Amaranthus fimbriatus (Torr.) Benth. ex S. Wats.
  fringed amaranth
Amaranthus hybridus L.
  slim amaranth
Amaranthus palmeri S. Wats.
  carelessweed
Amaranthus paniculatus L.
  = Amaranthus cruentus
Amaranthus powellii S. Wats.
  Powell's amaranth
Amaranthus pringlei S. Wats.
  Pringle's amaranth
Amaranthus retroflexus L.
  redroot amaranth
Amaranthus rudis Sauer
  tall amaranth
Amaranthus spinosus L.
  spiny amaranth
Amaranthus viridis L.
  slender amaranth
Amaranthus watsonii Standl.
  Watson's amaranth
Guilleminea densa (Humb. & Bonpl. ex Willd.) Moq.
  small matweed
Guilleminea densa var. densa (Humb. & Bonpl. ex Willd.) Moq.
  small matweed
Tidestromia lanuginosa (Nutt.) Standl.
  woolly tidestromia
Tidestromia oblongifolia (S. Wats.) Standl.
  Arizona honeysweet

ANACARDIACEAE
Lithrea molleoides (Vell.) Engl.
  aroeira blanca
Malosma laurina (Nutt.) Nutt. ex Abrams
  laurel sumac
Rhus diversiloba Torr. & Gray
  = Toxicodendron diversilobum
Rhus glabra L.
  smooth sumac
Rhus integrifolia (Nutt.) Benth. & Hook. f. ex Brewer & S. Wats.
  lemonade sumac
Rhus laurina Nutt.
  = Malosma laurina
Rhus ovata S. Wats.
  sugar sumac
Rhus trilobata Nutt.
  skunkbush sumac
Rhus trilobata var. anisophylla (Greene) Jepson
  skunkbush sumac
Rhus trilobata var. pilosissima Engelm.
  pubescent squawbush
Rhus trilobata var. quinata (Greene) Jepson
  skunkbush sumac
Rhus trilobata var. simplicifolia (Greene) Barkl.
  skunkbush sumac
Rhus trilobata var. trilobata Nutt.
  skunkbush sumac
Schinus molle L.
  Peruvian peppertree
Schinus terebinthifolius Raddi
  Christmasberry
Toxicodendron diversilobum (Torr. & Gray) Greene
  Pacific poison oak
Toxicodendron radicans ssp. diversilobum (Torr. & Gray) Thorne
  = Toxicodendron diversilobum

APOCYNACEAE
Amsonia tomentosa Torr. & Frem.
  woolly bluestar
Amsonia tomentosa var. tomentosa Torr. & Frem.
  woolly bluestar
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 X floribundum Greene (pro sp.)
  intermediate dogbane
Apocynum medium Greene
  = Apocynum X floribundum
Apocynum sibiricum Jacq.
  = Apocynum cannabinum
Apocynum suksdorfii Greene
  = Apocynum cannabinum
Cycladenia humilis Benth.
  Sacramento waxydogbane
Cycladenia humilis var. humilis Benth.
  Sacramento waxydogbane
Cycladenia humilis var. venusta (Eastw.) Woods. ex Munz
  Sacramento waxydogbane
Vinca major L.
  bigleaf periwinkle

APONOGETONACEAE
Aponogeton distachyos L. f.
  cape pondweed

ARACEAE
Arum italicum P. Mill.
  Italian lords and ladies
Lysichiton americanus Hulten & St. John
  American skunkcabbage
Lysichiton camtschatcensis auct. non (L.) Schott
  = Lysichiton americanus
Pistia stratiotes L.
  water lettuce
Zantedeschia aethiopica (L.) Spreng.
  calla lily

ARALIACEAE
Aralia californica S. Wats.
  California spikenard
Hedera helix L.
  English ivy

ARECACEAE
Neowashingtonia filamentosa (Fenzi) Sudworth
  = Washingtonia filifera
Phoenix canariensis hort. ex Chabaud
  Canary Island date palm
Washingtonia filamentosa (Fenzi) Kuntze
  = Washingtonia filifera
Washingtonia filifera (L. Linden) H. Wendl.
  California fan palm

ARISTOLOCHIACEAE
Aristolochia californica Torr.
  California dutchman's pipe
Asarum caudatum Lindl.
  British Columbia wildginger
Asarum caudatum var. caudatum Lindl.
  British Columbia wildginger
Asarum hartwegii S. Wats.
  Hartweg's wildginger
Asarum lemmonii S. Wats.
  Lemmon's wildginger
Asarum marmoratum Piper
  marbled wildginger

ASCLEPIADACEAE
Araujia sericifera Brot.
  white bladderflower
Asclepias albicans S. Wats.
  whitestem milkweed
Asclepias asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias asperula ssp. asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias californica Greene
  California milkweed
Asclepias californica ssp. californica Greene
  California milkweed
Asclepias californica ssp. greenei Woods.
  Greene's milkweed
Asclepias cordifolia (Benth.) Jepson
  heartleaf milkweed
Asclepias cryptoceras S. Wats.
  pallid milkweed
Asclepias cryptoceras ssp. cryptoceras S. Wats.
  pallid milkweed
Asclepias cryptoceras ssp. davisii (Woods.) Woods.
  Davis' milkweed
Asclepias curassavica L.
  bloodflower
Asclepias eriocarpa Benth.
  woollypod milkweed
Asclepias erosa Torr.
  desert milkweed
Asclepias fascicularis Dcne.
  Mexican whorled milkweed
Asclepias latifolia (Torr.) Raf.
  broadleaf milkweed
Asclepias nyctaginifolia Gray
  Mojave milkweed
Asclepias solanoana Woods.
  serpentine milkweed
Asclepias speciosa Torr.
  showy milkweed
Asclepias subulata Dcne.
  rush milkweed
Asclepias vestita Hook. & Arn.
  woolly milkweed
Asclepias vestita ssp. parishii (Jepson) Woods.
  Parish's woolly milkweed
Asclepias vestita ssp. vestita Hook. & Arn.
  woolly milkweed
Cynanchum utahense (Engelm.) Woods.
  Utah swallowwort
Funastrum 
  = Sarcostemma 
Gonolobus 
  = Matelea 
Matelea parvifolia (Torr.) Woods.
  spearleaf
Sarcostemma cynanchoides Dcne.
  fringed twinevine
Sarcostemma cynanchoides ssp. hartwegii (Vail) R. Holm
  Hartweg's twinevine
Sarcostemma hirtellum (Gray) R. Holm
  hairy milkweed
Solanoa purpurascens (Gray) Greene
  = Asclepias solanoana

ASPLENIACEAE
Asplenium septentrionale (L.) Hoffmann
  forked spleenwort
Asplenium trichomanes L.
  maidenhair spleenwort
Asplenium trichomanes-ramosum L.
  brightgreen spleenwort
Asplenium vespertinum Maxon
  western spleenwort

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

BALSAMINACEAE
Impatiens balfourii Hook. f.
  Balfour's touchmenot
Impatiens glandulifera Royle
  ornamental jewelweed
Impatiens noli-tangere L.
  western touchmenot
Impatiens occidentalis Rydb.
  = Impatiens noli-tangere

BASELLACEAE
Anredera cordifolia (Ten.) Steenis
  heartleaf madeiravine

BATACEAE
Batis maritima L.
  turtleweed

BERBERIDACEAE
Achlys triphylla (Sm.) DC.
  vanilla leaf
Berberis amplectens (Eastw.) L.C. Wheeler
  = Mahonia repens
Berberis aquifolium Pursh
  = Mahonia aquifolium
Berberis californica Jepson
  = Mahonia californica
Berberis dictyota Jepson
  = Mahonia dictyota
Berberis fremontii Torr.
  = Mahonia fremontii
Berberis haematocarpa Woot.
  = Mahonia haematocarpa
Berberis nevinii Gray
  = Mahonia nevinii
Berberis nervosa Pursh
  = Mahonia nervosa var. nervosa
Berberis pinnata Lag.
  = Mahonia pinnata ssp. pinnata
Berberis repens Lindl.
  = Mahonia repens
Berberis sonnei (Abrams) McMinn
  = Mahonia repens
Mahonia aquifolium (Pursh) Nutt.
  hollyleaved barberry
Mahonia californica (Jepson) Ahrendt
  California Oregongrape
Mahonia dictyota (Jepson) Fedde
  shining netvein barberry
Mahonia fremontii (Torr.) Fedde
  Fremont's mahonia
Mahonia haematocarpa (Woot.) Fedde
  red barberry
Mahonia nervosa (Pursh) Nutt.
  Cascade Oregongrape
Mahonia nevinii (Gray) Fedde
  Nevin's barberry
Mahonia nervosa var. mendocinensis (J.B. Roof) J.B. Roof
  Mendocino Oregongrape
Mahonia nervosa var. nervosa (Pursh) Nutt.
  cascade Oregongrape
Mahonia pinnata (Lag.) Fedde
  wavyleaf Oregongrape
Mahonia pinnata ssp. insularis (Munz) J.B. Roof
  island barberry
Mahonia pinnata ssp. pinnata (Lag.) Fedde
  California barberry
Mahonia repens (Lindl.) G. Don
  Oregongrape
Vancouveria chrysantha Greene
  golden insideout flower
Vancouveria hexandra (Hook.) Morr. & Dcne.
  white insideout flower
Vancouveria planipetala Calloni
  redwood insideout flower

BETULACEAE
Alnus incana (L.) Moench
  mountain alder
Alnus incana ssp. tenuifolia (Nutt.) Breitung
  thinleaf alder
Alnus rhombifolia Nutt.
  white alder
Alnus rubra Bong.
  red alder
Alnus viridis (Vill.) Lam. & DC.
  sitka alder
Alnus viridis ssp. sinuata (Regel) A.& D. Love
  Sitka alder
Betula fontinalis Sarg.
  = Betula occidentalis
Betula nana L.
  bog birch
Betula occidentalis Hook.
  water birch
Betula papyrifera var. occidentalis (Hook.) Sarg.
  = Betula occidentalis
Corylus cornuta Marsh.
  beaked hazelnut
Corylus cornuta var. californica (A. DC.) Sharp
  California hazelnut

BIGNONIACEAE
Chilopsis linearis (Cav.) Sweet
  desert willow
Chilopsis linearis ssp. arcuata (Fosberg) Henrickson
  desert willow

BLECHNACEAE
Blechnum spicant (L.) Roth
  deer fern
Woodwardia fimbriata Sm.
  giant chainfern

BORAGINACEAE
Amsinckia douglasiana A. DC.
  Douglas' fiddleneck
Amsinckia eastwoodiae J.F. Macbr.
  Eastwood's fiddleneck
Amsinckia grandiflora (Kleeb. ex Gray) Kleeb. ex Greene
  largeflowered fiddleneck
Amsinckia intermedia Fisch. & C.A. Mey.
  = Amsinckia menziesii var. intermedia
Amsinckia lunaris J.F. Macbr.
  bentflower fiddleneck
Amsinckia lycopsoides Lehm.
  tarweed fiddleneck
Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr.
  Menzies' fiddleneck
Amsinckia menziesii var. intermedia (Fisch & C.A. Mey.) Ganders
Amsinckia menziesii var. menziesii (Lehm.) A. Nels. & J.F. Macbr.
Amsinckia spectabilis Fisch. & C.A. Mey.
  woolly breeches
Amsinckia tessellata Gray
  bristly fiddleneck
Amsinckia tessellata var. gloriosa (Eastw. ex Suksdorf) Hoover
Amsinckia vernicosa Hook. & Arn.
  green fiddleneck
Amsinckia vernicosa var. furcata (Suksdorf) Hoover
Anchusa arvensis (L.) Bieb.
  small bugloss
Anchusa officinalis L.
  common bugloss
Asperugo procumbens L.
  madwort
Borago officinalis L.
  common borage
Buglossoides arvensis (L.) I.M. Johnston
  corn gromwell
Coldenia 
  = Tiquilia 
Cryptantha affinis (Gray) Greene
  quill catseye
Cryptantha ambigua (Gray) Greene
  basin catseye
Cryptantha angustifolia (Torr.) Greene
  Panamint catseye
Cryptantha barbigera (Gray) Greene
  bearded catseye
Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha cinerea (Greene) Cronq.
  James' catseye
Cryptantha cinerea var. abortiva (Greene) Cronq.
  James' catseye
Cryptantha circumscissa var. circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha circumscissa var. hispida (J.F. Macbr.) I.M. Johnston
  cushion catseye
Cryptantha circumscissa var. rosulata J.T. Howell
  cushion catseye
Cryptantha clevelandii Greene
  Cleveland's catseye
Cryptantha clevelandii var. clevelandii Greene
  Cleveland's catseye
Cryptantha clevelandii var. dissita (I.M. Johnston) Jepson & Hoover
  Cleveland's catseye
Cryptantha clevelandii var. florosa I.M. Johnston
  Cleveland's catseye
Cryptantha confertiflora (Greene) Payson
  basin yellow catseye
Cryptantha costata Brandeg.
  ribbed catseye
Cryptantha corollata (I.M. Johnston) I.M. Johnston
  coast range catseye
Cryptantha crinita Greene
  Sacramento catseye
Cryptantha crymophila I.M. Johnston
  subalpine catseye
Cryptantha dumetorum (Greene ex Gray) Greene
  bushloving catseye
Cryptantha echinella Greene
  prickly catseye
Cryptantha excavata Brandeg.
  deepscar catseye
Cryptantha flaccida (Dougl. ex Lehm.) Greene
  weakstem catseye
Cryptantha flavoculata (A. Nels.) Payson
  roughseed catseye
Cryptantha ganderi I.M. Johnston
  Gander's catseye
Cryptantha glomeriflora Greene
  Truckee catseye
Cryptantha gracilis Osterhout
  narrowstem catseye
Cryptantha hispidula Greene ex Brand
  Napa catseye
Cryptantha hoffmannii I.M. Johnston
  Hoffmann's catseye
Cryptantha holoptera (Gray) J.F. Macbr.
  winged catseye
Cryptantha hooveri I.M. Johnston
  Hoover's catseye
Cryptantha humilis (Gray) Payson
  roundspike catseye
Cryptantha incana Greene
  Tulare catseye
Cryptantha intermedia (Gray) Greene
  Clearwater catseye
Cryptantha leiocarpa (Fisch. & C.A. Mey.) Greene
  coastal catseye
Cryptantha mariposae I.M. Johnston
  Mariposa catseye
Cryptantha maritima (Greene) Greene
  Guadalupe catseye
Cryptantha maritima var. maritima (Greene) Greene
  Guadalupe catseye
Cryptantha maritima var. pilosa I.M. Johnston
  Guadalupe catseye
Cryptantha micrantha (Torr.) I.M. Johnston
  redroot catseye
Cryptantha micromeres (Gray) Greene
  pygmyflower catseye
Cryptantha microstachys (Greene ex Gray) Greene
  Tejon catseye
Cryptantha milo-bakeri I.M. Johnston
  Milo Baker's catseye
Cryptantha micrantha var. lepida (Gray) I.M. Johnston
  redroot catseye
Cryptantha micrantha var. micrantha (Torr.) I.M. Johnston
  redroot catseye
Cryptantha mohavensis (Greene) Greene
  Mojave catseye
Cryptantha muricata (Hook. & Arn.) A. Nels. & J.F. Macbr.
  pointed catseye
Cryptantha muricata var. clokeyi (I.M. Johnston) Jepson
  Clokey's catseye
Cryptantha muricata var. denticulata (Greene) I.M. Johnston
  pointed catseye
Cryptantha muricata var. jonesii (Gray) I.M. Johnston
  Jones's catseye
Cryptantha muricata var. muricata (Hook. & Arn.) A. Nels. & J.F. Macbr.
  pointed catseye
Cryptantha nemaclada Greene
  Colusa catseye
Cryptantha nevadensis A. Nels. & Kennedy
  Nevada catseye
Cryptantha nevadensis var. nevadensis A. Nels. & Kennedy
  Nevada catseye
Cryptantha nevadensis var. rigida I.M. Johnston
  Nevada catseye
Cryptantha nubigena (Greene) Payson
  Sierran catseye
Cryptantha oxygona (Gray) Greene
  sharpnut catseye
Cryptantha pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha pterocarya var. cycloptera (Greene) J.F. Macbr.
  wingnut catseye
Cryptantha pterocarya var. pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha racemosa (S. Wats.) Greene
  bushy catseye
Cryptantha rattanii Greene
  Rattan's catseye
Cryptantha recurvata Coville
  curvenut catseye
Cryptantha roosiorum Munz
  bristlecone catseye
Cryptantha rostellata var. rostellata (Greene) Greene
  beaked catseye
Cryptantha scoparia A. Nels.
  Pinyon Desert catseye
Cryptantha simulans Greene
  pinewoods catseye
Cryptantha similis Mathew & Raven
  desert catseye
Cryptantha sobolifera Payson
  Waterton Lakes catseye
Cryptantha sparsiflora (Greene) Greene
  slender 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 traskiae I.M. Johnston
  Trask's catseye
Cryptantha tumulosa (Payson) Payson
  New York Mountain catseye
Cryptantha utahensis (Gray) Greene
  scented catseye
Cryptantha virginensis (M.E. Jones) Payson
  Virgin River catseye
Cryptantha watsonii (Gray) Greene
  Watson's catseye
Cynoglossum grande Dougl. ex Lehm.
  Pacific hound's tongue
Cynoglossum occidentale Gray
  western hound's tongue
Cynoglossum officinale L.
  gypsyflower
Echium fastuosum Ait.
  pride of Madeira
Echium plantagineum L.
  salvation jane
Hackelia amethystina J.T. Howell
  amethyst stickseed
Hackelia bella (J.F. Macbr.) I.M. Johnston
  greater showy stickseed
Hackelia brevicula (Jepson) J.L. Gentry
  Poison Canyon stickseed
Hackelia californica (Gray) I.M. Johnston
  California stickseed
Hackelia cusickii (Piper) Brand
  Cusick's stickseed
Hackelia floribunda (Lehm.) I.M. Johnston
  manyflower stickseed
Hackelia micrantha (Eastw.) J.L. Gentry
  Jessica sticktight
Hackelia mundula (Jepson) Ferris
  pink stickseed
Hackelia nervosa (Kellogg) I.M. Johnston
  Sierran stickseed
Hackelia patens (Nutt.) I.M. Johnston
  common stickseed
Hackelia patens var. patens (Nutt.) I.M. Johnston
  spotted stickseed
Hackelia setosa (Piper) I.M. Johnston
  bristly stickseed
Hackelia sharsmithii I.M. Johnston
  Sharsmith's stickseed
Hackelia velutina (Piper) I.M. Johnston
  velvet stickseed
Hackelia virginiana (L.) I.M. Johnston
  beggarslice
Harpagonella palmeri Gray
  Palmer's grapplinghook
Harpagonella palmeri var. palmeri Gray
  Palmer's grapplinghook
Heliotropium amplexicaule Vahl
  clasping heliotrope
Heliotropium convolvulaceum (Nutt.) Gray
  phlox heliotrope
Heliotropium curassavicum L.
  salt heliotrope
Heliotropium curassavicum var. oculatum (Heller) I.M. Johnston
  seaside heliotrope
Heliotropium europaeum L.
  European heliotrope
Lappula occidentalis (S. Wats.) Greene
  flatspine stickseed
Lappula occidentalis var. occidentalis (S. Wats.) Greene
  desert stickseed
Lappula squarrosa (Retz.) Dumort.
  European stickseed
Lithospermum arvense L.
  = Buglossoides arvensis
Lithospermum californicum Gray
  California gromwell
Lithospermum incisum Lehm.
  narrowleaf gromwell
Lithospermum ruderale Dougl. ex Lehm.
  western gromwell
Mertensia bella Piper
  beautiful bluebells
Mertensia ciliata (James ex Torr.) G. Don
  mountain bluebells
Mertensia ciliata var. stomatechoides (Kellogg) Jepson
  tall fringe bluebells
Mertensia cusickii Piper
  Toiyabe bluebells
Mertensia franciscana Heller
  Franciscan bluebells
Mertensia longiflora Greene
  small bluebells
Mertensia oblongifolia (Nutt.) G. Don
  oblongleaf bluebells
Myosotis discolor Pers.
  changing forget me not
Myosotis laxa Lehm.
  bay forget me not
Myosotis latifolia Poir.
  broadleaf forget me not
Myosotis scorpioides L.
  true forget me not
Myosotis stricta Link ex Roemer & J.A. Schultes
  strict forget me not
Myosotis sylvatica Ehrh. ex Hoffmann
  woodland forget me not
Myosotis verna Nutt.
  spring forget me not
Pectocarya heterocarpa (I.M. Johnston) I.M. Johnston
  chuckwalla combseed
Pectocarya linearis (Ruiz & Pavon) DC.
  sagebrush combseed
Pectocarya penicillata (Hook. & Arn.) A. DC.
  sleeping combseed
Pectocarya platycarpa (Munz & Johnston) Munz & Johnston
  broadfruit combseed
Pectocarya pusilla (A. DC.) Gray
  little combseed
Pectocarya recurvata I.M. Johnston
  curvenut combseed
Pectocarya setosa Gray
  moth combseed
Pentaglottis sempervirens (L.) Tausch ex Bailey
  evergreen bugloss
Plagiobothrys acanthocarpus (Piper) I.M. Johnston
  adobe popcornflower
Plagiobothrys arizonicus (Gray) Greene ex Gray
  Arizona popcornflower
Plagiobothrys austiniae (Greene) I.M. Johnston
  Austin's popcornflower
Plagiobothrys bracteatus (T.J. Howell) I.M. Johnston
  bracted popcornflower
Plagiobothrys bracteatus var. aculeolatus (Piper) I.M. Johnston
  bracted popcornflower
Plagiobothrys bracteatus var. bracteatus (T.J. Howell) I.M. Johnston
  bracted popcornflower
Plagiobothrys canescens Benth.
  valley popcornflower
Plagiobothrys canescens var. canescens Benth.
  valley popcornflower
Plagiobothrys canescens var. catalinensis (Gray) Jepson
  Catalina popcornflower
Plagiobothrys chorisianus (Cham.) I.M. Johnston
  artist's popcornflower
Plagiobothrys chorisianus var. chorisianus (Cham.) I.M. Johnston
  artist's popcornflower
Plagiobothrys chorisianus var. hickmanii (Greene) I.M. Johnston
  Hickman's popcornflower
Plagiobothrys chorisianus var. undulatus (Piper) Higgins, comb. nov. ined.
  artist's popcornflower
Plagiobothrys collinus (Phil.) I.M. Johnston
  Cooper's popcornflower
Plagiobothrys collinus var. californicus (Gray) Higgins
  California popcornflower
Plagiobothrys collinus var. fulvescens (I.M. Johnston) Higgins
  Cooper's popcornflower
Plagiobothrys collinus var. gracilis (I.M. Johnston) Higgins
  Cooper's popcornflower
Plagiobothrys collinus var. ursinus (Gray) Higgins
  Cooper's popcornflower
Plagiobothrys distantiflorus (Piper) I.M. Johnston ex M.E. Peck
  California popcornflower
Plagiobothrys fulvus (Hook. & Arn.) I.M. Johnston
  fulvous popcornflower
Plagiobothrys fulvus var. campestris (Greene) I.M. Johnston
  fulvous popcornflower
Plagiobothrys glaber (Gray) I.M. Johnston
  hairless popcornflower
Plagiobothrys glyptocarpus (Piper) I.M. Johnston
  sculptured popcornflower
Plagiobothrys glyptocarpus var. glyptocarpus (Piper) I.M. Johnston
  sculptured popcornflower
Plagiobothrys glyptocarpus var. modestus I.M. Johnston
  sculptured popcornflower
Plagiobothrys greenei (Gray) I.M. Johnston
  Greene's popcornflower
Plagiobothrys hispidus Gray
  Cascade popcornflower
Plagiobothrys humistratus (Greene) I.M. Johnston
  dwarf popcornflower
Plagiobothrys hystriculus (Piper) I.M. Johnston
  bearded popcornflower
Plagiobothrys infectivus I.M. Johnston
  dye popcornflower
Plagiobothrys jonesii Gray
  Mojave popcornflower
Plagiobothrys kingii (S. Wats.) Gray
  Great Basin popcornflower
Plagiobothrys kingii var. harknessii (Greene) Jepson
  Harness' popcornflower
Plagiobothrys kingii var. kingii (S. Wats.) Gray
  King's popcornflower
Plagiobothrys leptocladus (Greene) I.M. Johnston
  finebranched popcornflower
Plagiobothrys lithocaryus (Greene ex Gray) I.M. Johnston
  Mayacamas popcornflower
Plagiobothrys mollis (Gray) I.M. Johnston
  soft popcornflower
Plagiobothrys mollis var. mollis (Gray) I.M. Johnston
  soft popcornflower
Plagiobothrys mollis var. vestitus (Greene) I.M. Johnston
  soft popcornflower
Plagiobothrys myosotoides (Lehm.) Brand
  forget me not popcornflower
Plagiobothrys nothofulvus (Gray) Gray
  rusty popcornflower
Plagiobothrys parishii I.M. Johnston
  Parish's popcornflower
Plagiobothrys reticulatus (Piper) I.M. Johnston
  netted popcornflower
Plagiobothrys salsus (Brandeg.) I.M. Johnston
  salty popcornflower
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys scriptus (Greene) I.M. Johnston
  scribe popcornflower
Plagiobothrys scouleri var. cusickii (Greene) Higgins
  Cusick's popcornflower
Plagiobothrys scouleri var. hispidulus (Greene) Dorn
  sleeping popcornflower
Plagiobothrys scouleri var. scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys shastensis Greene ex Gray
  Shasta popcornflower
Plagiobothrys stipitatus (Greene) I.M. Johnston
  slender popcornflower
Plagiobothrys strictus (Greene) I.M. Johnston
  Calistoga popcornflower
Plagiobothrys stipitatus var. micranthus (Piper) I.M. Johnston
  stalked popcornflower
Plagiobothrys stipitatus var. stipitatus (Greene) I.M. Johnston
  slender popcornflower
Plagiobothrys tenellus (Nutt. ex Hook.) Gray
  Pacific popcornflower
Plagiobothrys tener (Greene) I.M. Johnston
  slender popcornflower
Plagiobothrys tener var. subglaber I.M. Johnston
  slender popcornflower
Plagiobothrys tener var. tener (Greene) I.M. Johnston
  slender popcornflower
Plagiobothrys torreyi (Gray) Gray
  Torrey's popcornflower
Plagiobothrys torreyi var. diffusus (Greene) I.M. Johnston
Plagiobothrys trachycarpus (Gray) I.M. Johnston
  roughfruit popcornflower
Plagiobothrys uncinatus J.T. Howell
  Salinas Valley popcornflower
Symphytum asperum Lepechin
  prickly comfrey
Tiquilia canescens (DC.) A. Richards.
  woody crinklemat
Tiquilia canescens var. canescens (DC.) A. Richards.
  gray coldenia
Tiquilia canescens var. pulchella (I.M. Johnston) A. Richards.
  woody crinklemat
Tiquilia nuttallii (Hook.) A. Richards.
  Nuttall's coldenia
Tiquilia palmeri (Gray) A. Richards.
  Palmer's coldenia
Tiquilia plicata (Torr.) A. Richards.
  fanleaf crinklemat

BUDDLEJACEAE
Buddleja davidii Franch.
  orange eye butterflybush
Buddleja saligna Willd.
  squarestem butterflybush
Buddleja utahensis Coville
  Utah butterflybush

BURSERACEAE
Bursera microphylla Gray
  elephanttree

CABOMBACEAE
Brasenia schreberi J.F. Gmel.
  watershield

CACTACEAE
Bergerocactus emoryi (Engelm.) Engelm.
  golden snakecactus
Carnegia gigantea (Engelm.) Britt. & Rose
  saguaro
Echinocactus polycephalus Engelm. & Bigelow
  cottontop cactus
Echinocactus polycephalus var. polycephalus Engelm. & Bigelow
  cottontop cactus
Echinocereus coccineus Engelm.
  scarlet hedgehog cactus
Echinocereus coccineus var. coccineus Engelm.
  scarlet hedgehog cactus
Echinocereus engelmannii (Parry ex Engelm.) Lem.
  saints cactus
Echinocereus engelmannii var. acicularis L. Benson
  saints cactus
Echinocereus engelmannii var. armatus L. Benson
  saints cactus
Echinocereus engelmannii var. chrysocentrus (Engelm. & Bigelow) Rumpl.
  saints cactus
Echinocereus engelmannii var. engelmannii (Parry ex Engelm.) Lem.
  Engelmann's cactus
Echinocereus engelmannii var. howei L. Benson
  Howe's cactus
Echinocereus engelmannii var. munzii (Parish) Pierce & Fosberg
  Munz's cactus
Echinocereus triglochidiatus Engelm.
  kingcup cactus
Echinocereus triglochidiatus var. mojavensis (Engelm. & Bigelow) L. Benson
  Mojave kingcup cactus
Escobaria alversonii (Coult.) N.P. Taylor, comb. nov. ined.
  cushion foxtail cactus
Escobaria vivipara (Nutt.) Buxbaum
  spinystar
Escobaria vivipara var. arizonica (Engelm.) D.R. Hunt
  Arizona spinystar
Escobaria vivipara var. deserti (Engelm.) D.R. Hunt
  desert spinystar
Escobaria vivipara var. rosea (Clokey) D.R. Hunt
  spinystar
Ferocactus cylindraceus (Engelm.) Orcutt
  California barrelcactus
Ferocactus cylindraceus var. cylindraceus (Engelm.) Orcutt
  California barrelcactus
Ferocactus cylindraceus var. lecontei (Engelm.) H. Bravo
  Leconte's barrelcactus
Ferocactus viridescens (Torr. & Gray) Britt. & Rose
  San Diego barrelcactus
Mammillaria dioica K. Brandeg.
  strawberry cactus
Mammillaria grahamii Engelm.
  Graham's nipple cactus
Mammillaria grahamii var. grahamii Engelm.
  Graham's nipple cactus
Mammillaria tetrancistra Engelm.
  common fishhook cactus
Neolloydia johnsonii (Parry ex Engelm.) L. Benson
  = Sclerocactus johnsonii
Opuntia X demissa Griffiths (pro sp.)
  pricklypear
Opuntia X occidentalis Engelm. & Bigelow (pro sp.)
  pricklypear
Opuntia acanthocarpa Engelm. & Bigelow
  buckhorn cholla
Opuntia acanthocarpa var. acanthocarpa Engelm. & Bigelow
  buckhorn cholla
Opuntia acanthocarpa var. coloradensis L. Benson
  Colorado buckhorn cholla
Opuntia acanthocarpa var. ganderi (C.B. Wolf) L. Benson
  Gander's buckhorn cholla
Opuntia acanthocarpa var. major (Engelm. & Bigelow) L. Benson
  buckhorn cholla
Opuntia basilaris Engelm. & Bigelow
  beavertail pricklypear
Opuntia basilaris var. basilaris Engelm. & Bigelow
  beavertail pricklypear
Opuntia basilaris var. brachyclada (Griffiths) Munz
  beavertail pricklypear
Opuntia basilaris var. treleasei (Coult.) Coult. ex Toumey
  Trelease's beavertail pricklypear
Opuntia bigelovii Engelm.
  teddybear cholla
Opuntia bigelovii var. bigelovii Engelm.
  teddybear cholla
Opuntia chlorotica Engelm. & Bigelow
  dollarjoint pricklypear
Opuntia curvospina Griffiths
  Searchlight pricklypear
Opuntia echinocarpa Engelm. & Bigelow
  staghorn cholla
Opuntia echinocarpa var. echinocarpa Engelm. & Bigelow
  staghorn cholla
Opuntia engelmannii Salm-Dyck
  cactus apple
Opuntia engelmannii var. engelmannii Salm-Dyck
  cactus apple
Opuntia erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. ursina (A. Weber) Parish
  grizzlybear pricklypear
Opuntia erinacea var. utahensis (Engelm.) L. Benson
  Utah grizzlybear pricklypear
Opuntia ficus-indica (L.) P. Mill.
  tuna cactus
Opuntia fosbergii C.B. Wolf
  Hoffmann's teddybear cholla
Opuntia fragilis (Nutt.) Haw.
  brittle pricklypear
Opuntia fragilis var. fragilis (Nutt.) Haw.
  pygmy pricklypear
Opuntia kunzei Rose
  devil's cholla
Opuntia littoralis (Engelm.) Cockerell
  coastal pricklypear
Opuntia littoralis var. austrocalifornica L. Benson & Walkington
  coastal pricklypear
Opuntia littoralis var. littoralis (Engelm.) Cockerell
  coastal pricklypear
Opuntia littoralis var. piercei (Fosberg) L. Benson & Walkington
  coastal pricklypear
Opuntia littoralis var. vaseyi (Coult.) L. Benson & Walkington
  Vasey's coastal pricklypear
Opuntia macrorhiza Engelm.
  twistspine pricklypear
Opuntia macrorhiza var. macrorhiza Engelm.
  twistspine pricklypear
Opuntia martiniana (L. Benson) Parfitt
  seashore cactus
Opuntia munzii C.B. Wolf
  Munz's cholla
Opuntia oricola Philbrick
  chaparral pricklypear
Opuntia parishii Orcutt
  matted cholla
Opuntia parryi Engelm.
  brownspined pricklypear
Opuntia parryi var. parryi Engelm.
  brownspined pricklypear
Opuntia parryi var. serpentina (Engelm.) L. Benson
  serpentine cholla
Opuntia phaeacantha Engelm.
  tulip pricklypear
Opuntia phaeacantha var. major Engelm.
  Mojave pricklypear
Opuntia polyacantha Haw.
  plains pricklypear
Opuntia polyacantha var. rufispina (Engelm. & Bigelow ex Engelm.) L. Benson
  hairspine pricklypear
Opuntia prolifera Engelm.
  coastal cholla
Opuntia pulchella Engelm.
  sagebrush cholla
Opuntia ramosissima Engelm.
  branched pencil cholla
Opuntia wigginsii L. Benson
  Wiggins' cholla
Opuntia wolfii (L. Benson) M.A. Baker
  Wolf's opuntia
Sclerocactus johnsonii (Parry ex Engelm.) N.P. Taylor
  Johnson's fishhook cactus
Sclerocactus polyancistrus (Engelm. & Bigelow) Britt. & Rose
  redspined fishhook cactus

CALLITRICHACEAE
Callitriche hermaphroditica L.
  northern waterstarwort
Callitriche heterophylla Pursh
  larger waterstarwort
Callitriche heterophylla ssp. bolanderi (Hegelm.) Calder & Taylor
  Bolander's waterstarwort
Callitriche heterophylla ssp. heterophylla Pursh
  twoheaded waterstarwort
Callitriche longipedunculata Morong
  longstock waterstarwort
Callitriche marginata Torr.
  winged waterstarwort
Callitriche palustris L.
  vernal waterstarwort
Callitriche peploides Nutt.
  matted waterstarwort
Callitriche stagnalis Scop.
  pond waterstarwort
Callitriche trochlearis Fassett
  effluent waterstarwort

CALYCANTHACEAE
Calycanthus occidentalis Hook. & Arn.
  western sweetshrub

CAMPANULACEAE
Asyneuma prenanthoides (Dur.) McVaugh
  California harebell
Campanula angustiflora Eastw.
  Eastwood's bellflower
Campanula californica (Kellogg) Heller
  swamp bellflower
Campanula exigua Rattan
  chaparral bellflower
Campanula griffinii Morin
  Griffin's bellflower
Campanula rotundifolia L.
  bluebell bellflower
Campanula scabrella Engelm.
  rough bellflower
Campanula scouleri Hook. ex A. DC.
  pale bellflower
Campanula sharsmithiae Morin
  Mt. Hamilton bellflower
Campanula shetleri Heckard
  Castle Crags bellflower
Campanula wilkinsiana Greene
  Wilkins' bellflower
Downingia bacigalupii Weiler
  Bach's calicoflower
Downingia bella Hoover
  Hoover's calicoflower
Downingia bicornuta Gray
  doublehorn calicoflower
Downingia bicornuta var. bicornuta Gray
  doublehorn calicoflower
Downingia bicornuta var. picta Hoover
  doublehorn calicoflower
Downingia concolor Greene
  maroonspot calicoflower
Downingia concolor var. brevior McVaugh
  maroonspot calicoflower
Downingia concolor var. concolor Greene
  maroonspot calicoflower
Downingia concolor var. tricolor (Greene) Jepson
  maroonspot calicoflower
Downingia cuspidata (Greene) Greene ex Jepson
  toothed calicoflower
Downingia elegans (Dougl. ex Lindl.) Torr.
  elegant calicoflower
Downingia elegans var. brachypetala (Gandog.) McVaugh
  elegant calicoflower
Downingia elegans var. elegans (Dougl. ex Lindl.) Torr.
  elegant calicoflower
Downingia insignis Greene
  harlequin calicoflower
Downingia laeta (Greene) Greene
  Great Basin calicoflower
Downingia montana Greene
  Sierran calicoflower
Downingia ornatissima Greene
  folded calicoflower
Downingia ornatissima var. eximia (Hoover) McVaugh
  folded calicoflower
Downingia ornatissima var. ornatissima Greene
  folded calicoflower
Downingia pulchella (Lindl.) Torr.
  flatface calicoflower
Downingia pusilla (G. Don) Torr.
  dwarf calicoflower
Downingia yina Applegate
  cascade calicoflower
Githopsis diffusa Gray
  San Gabriel bluecup
Githopsis diffusa ssp. candida (Ewan) Morin
  San Gabriel bluecup
Githopsis diffusa ssp. diffusa Gray
  San Gabriel bluecup
Githopsis diffusa ssp. filicaulis (Ewan) Morin
  San Gabriel bluecup
Githopsis diffusa ssp. robusta Morin
  San Gabriel bluecup
Githopsis pulchella Vatke
  Sierran bluecup
Githopsis pulchella ssp. campestris Morin
  Sierran bluecup
Githopsis pulchella ssp. pulchella Vatke
  Sierran bluecup
Githopsis pulchella ssp. pulchella var. glabra (Jepson) Morin
  Sierran bluecup
Githopsis pulchella ssp. pulchella var. pulchella Vatke
  Sierran bluecup
Githopsis pulchella ssp. serpentinicola Morin
  serpentine bluecup
Githopsis specularioides Nutt.
  common bluecup
Githopsis tenella Morin
  tubeflower bluecup
Heterocodon rariflorum Nutt.
  rareflower heterocodon
Howellia aquatilis Gray
  water howellia
Legenere limosa (Greene) McVaugh
  false venus' looking glass
Legousia speculum-veneris (L.) Fisch. ex A. DC.
  European venus' looking glass
Lobelia cardinalis L.
  cardinalflower
Lobelia cardinalis ssp. graminea (Lam.) McVaugh
  cardinalflower
Lobelia cardinalis ssp. graminea var. graminea (Lam.) McVaugh
  cardinalflower
Lobelia cardinalis ssp. graminea var. propinqua (Paxton) Bowden
  cardinalflower
Lobelia dunnii Greene
  Dunn's lobelia
Lobelia dunnii ssp. dunnii Greene
  Dunn's lobelia
Lobelia dunnii ssp. dunnii var. serrata (Gray) McVaugh
  Dunn's lobelia
Lobelia erinus L.
  edging lobelia
Nemacladus capillaris Greene
  common threadplant
Nemacladus glanduliferus Jepson
  glandular threadplant
Nemacladus glanduliferus var. glanduliferus Jepson
  glandular threadplant
Nemacladus glanduliferus var. orientalis McVaugh
  glandular threadplant
Nemacladus gracilis Eastw.
  slender threadplant
Nemacladus interior (Munz) G.T. Robbins
  Sierran threadplant
Nemacladus longiflorus Gray
  longflower threadplant
Nemacladus longiflorus var. breviflorus McVaugh
  longflower threadplant
Nemacladus longiflorus var. longiflorus Gray
  longflower threadplant
Nemacladus montanus Greene
  mountain threadplant
Nemacladus pinnatifidus Greene
  combleaf threadplant
Nemacladus ramosissimus Nutt.
  smallflower threadplant
Nemacladus rigidus Curran
  stoutstem threadplant
Nemacladus rubescens Greene
  desert threadplant
Nemacladus rubescens var. rubescens Greene
  desert threadplant
Nemacladus rubescens var. tenuis McVaugh
  desert threadplant
Nemacladus secundiflorus G.T. Robbins
  onesided threadplant
Nemacladus sigmoideus G.T. Robbins
  sigmoid threadplant
Nemacladus twisselmannii J.T. Howell
  Twisselmann's threadplant
Parishella californica Gray
  Mojave dwarf
Porterella carnosula (Hook. & Arn.) Torr.
  fleshy porterella
Triodanis perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass
Triodanis perfoliata var. biflora (Ruiz & Pavon) Bradley
  clasping Venus' lookingglass
Triodanis perfoliata var. perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass

CANNABACEAE
Cannabis sativa L.
  marijuana
Humulus lupulus L.
  common hop
Humulus lupulus var. lupulus L.
  common hop
Humulus lupulus var. neomexicanus A. Nels. & Cockerell
  common hop

CAPPARACEAE
Cleome isomeris Greene
  bladderpod spiderflower
Cleome lutea Hook.
  yellow spiderflower
Cleome lutea var. lutea Hook.
  yellow spiderflower
Cleome platycarpa Torr.
  golden spiderflower
Cleome serrulata Pursh
  Rocky Mountain beeplant
Cleome sparsifolia S. Wats.
  fewleaf spiderflower
Cleomella brevipes S. Wats.
  shortstalk stinkweed
Cleomella hillmanii A. Nels.
  Hillman's stinkweed
Cleomella obtusifolia Torr. & Frem.
  Mojave cleomella
Cleomella parviflora Gray
  slender cleomella
Cleomella plocasperma S. Wats.
  twisted cleomella
Isomeris arborea Nutt.
  = Cleome isomeris
Koeberlinia spinosa Zucc.
  crown of thorns
Koeberlinia spinosa var. spinosa Zucc.
  crown of thorns
Koeberlinia spinosa var. tenuispina Kearney & Peebles
  crown of thorns
Oxystylis lutea Torr. & Frem.
  spiny caper
Polanisia dodecandra (L.) DC.
  roughseed clammyweed
Polanisia dodecandra ssp. dodecandra (L.) DC.
  redwhisker clammyweed
Polanisia dodecandra ssp. trachysperma (Torr. & Gray) Iltis
  sandyseed clammyweed
Wislizenia refracta Engelm.
  jackass clover
Wislizenia refracta ssp. californica (Greene) Keller
  spectacle fruit
Wislizenia refracta ssp. palmeri (Gray) Keller
  Palmer's wislizenia
Wislizenia refracta ssp. refracta Engelm.
  spectacle fruit

CAPRIFOLIACEAE
Leycesteria formosa Wallich
  Himalayan honeysuckle
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 conjugialis Kellogg
  purpleflower honeysuckle
Lonicera etrusca Santi
  Etruscan honeysuckle
Lonicera hispidula (Lindl.) Dougl. ex Torr. & Gray
  California honeysuckle
Lonicera hispidula var. vacillans (Benth.) Gray
  pink honeysuckle
Lonicera interrupta Benth.
  chaparral honeysuckle
Lonicera involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera involucrata var. ledebourii (Eschsch.) Zabel
Lonicera japonica Thunb.
  Japanese honeysuckle
Lonicera subspicata Hook. & Arn.
  southern honeysuckle
Lonicera subspicata var. denudata Rehd.
  Santa Barbara honeysuckle
Lonicera subspicata var. johnstonii Keck
  Johnston's honeysuckle
Lonicera subspicata var. subspicata Hook. & Arn.
  southern 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. arborescens (Torr. & Gray) Gray
  Pacific red elder
Sambucus racemosa ssp. pubens var. melanocarpa (Gray) McMinn
  black elderberry
Sambucus racemosa ssp. pubens var. microbotrys (Rydb.) Kearney & Peebles
  European red elderberry
Sambucus racemosa var. racemosa L.
Symphoricarpos acutus (Gray) Dieck
  sharpleaf snowberry
Symphoricarpos albus (L.) Blake
  common snowberry
Symphoricarpos albus var. laevigatus (Fern.) Blake
  common snowberry
Symphoricarpos hesperius G.N. Jones
  trailing snowberry
Symphoricarpos longiflorus Gray
  desert snowberry
Symphoricarpos mollis Nutt.
  creeping snowberry
Symphoricarpos oreophilus Gray
  whortleleaf snowberry
Symphoricarpos oreophilus var. utahensis (Rydb.) A. Nels.
  Utah snowberry
Symphoricarpos rotundifolius Gray
  roundleaf snowberry
Symphoricarpos rotundifolius var. parishii (Rydb.) Dempster
  Parish's snowberry
Viburnum ellipticum Hook.
  common viburnum
Viburnum tinus L.
  laurustinus

CARYOPHYLLACEAE
Achyronychia cooperi Torr. & Gray
  onyxflower
Agrostemma githago L.
  common corncockle
Arenaria aculeata S. Wats.
  prickly sandwort
Arenaria congesta Nutt.
  ballhead sandwort
Arenaria congesta var. charlestonensis Maguire
  Charleston sandwort
Arenaria congesta var. crassula Maguire
  ballhead sandwort
Arenaria congesta var. congesta Nutt.
  ballhead sandwort
Arenaria congesta var. simulans Maguire
  ballhead sandwort
Arenaria congesta var. subcongesta (S. Wats.) S. Wats.
  subcongesta sandwort
Arenaria congesta var. suffrutescens (Gray) B.L. Robins.
  suffrutescent sandwort
Arenaria kingii (S. Wats.) M.E. Jones
  King's sandwort
Arenaria kingii ssp. compacta (Coville) Maguire
  King's compact sandwort
Arenaria lanuginosa (Michx.) Rohrb.
  spreading sandwort
Arenaria lanuginosa ssp. saxosa (Gray) Maguire
  spreading sandwort
Arenaria macradenia S. Wats.
  Mojave sandwort
Arenaria macradenia ssp. macradenia var. arcuifolia Maguire
  Mojave sandwort
Arenaria macradenia ssp. ferrisiae Abrams
  Ferris' sandwort
Arenaria macradenia ssp. macradenia var. kuschei (Eastw.) Maguire
  Mojave sandwort
Arenaria macradenia ssp. macradenia S. Wats.
  Mojave sandwort
Arenaria macradenia ssp. macradenia var. macradenia S. Wats.
  Mojave sandwort
Arenaria paludicola B.L. Robins.
  marsh sandwort
Arenaria pumicola Coville & Leib.
  Crater Lake sandwort
Arenaria serpyllifolia L.
  thymeleaf sandwort
Arenaria ursina B.L. Robins.
  Bear Valley sandwort
Cardionema ramosissimum (Weinm.) A. Nels. & J.F. Macbr.
  sandcarpet
Cerastium arvense L.
  field chickweed
Cerastium arvense ssp. maximum (Hollick & Britt.) Ugborogho
  field chickweed
Cerastium arvense ssp. strictum (L.) Ugborogho
  field chickweed
Cerastium beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium beeringianum ssp. beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium beeringianum ssp. beeringianum var. beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium dichotomum L.
  forked chickweed
Cerastium fontanum Baumg.
  common chickweed
Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet
  big chickweed
Cerastium glomeratum Thuill.
  sticky chickweed
Dianthus armeria L.
  Deptford pink
Dianthus barbatus L.
  sweetwilliam
Dianthus deltoides L.
  maiden pink
Gypsophila paniculata L.
  babysbreath gypsophila
Herniaria hirsuta L.
  hairy rupturewort
Herniaria hirsuta ssp. cinerea (DC.) Coutinho
  hairy rupturewort
Holosteum umbellatum L.
  jagged chickweed
Loeflingia squarrosa Nutt.
  spreading pygmyleaf
Loeflingia squarrosa ssp. artemisiarum Barneby & Twisselmann
  spreading pygmyleaf
Loeflingia squarrosa ssp. squarrosa Nutt.
  spreading pygmyleaf
Lychnis coronaria (L.) Desr.
  rose campion
Minuartia californica (Gray) Mattf.
  California sandwort
Minuartia decumbens T.W. & J.P. Nelson
  lassicus stitchwort
Minuartia douglasii (Fenzl ex Torr. & Gray) Mattf.
  Douglas' stitchwort
Minuartia howellii (S. Wats.) Mattf.
  Howell's stitchwort
Minuartia nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia nuttallii ssp. fragilis (Maguire & A. Holmgren) McNeill
  brittle sandwort
Minuartia nuttallii ssp. gracilis (B.L. Robins.) McNeill
  brittle sandwort
Minuartia nuttallii ssp. gregaria (Heller) McNeill
  brittle sandwort
Minuartia obtusiloba (Rydb.) House
  twinflower sandwort
Minuartia pusilla (S. Wats.) Mattf.
  annual sandwort
Minuartia pusilla var. diffusa (Maguire) McNeill
  annual sandwort
Minuartia pusilla var. pusilla (S. Wats.) Mattf.
  annual sandwort
Minuartia rosei (Maguire & Barneby) McNeill
  peanut stitchwort
Minuartia rossii (R. Br. ex Richards.) Graebn.
  Ross' sandwort
Minuartia rubella (Wahlenb.) Hiern
  beautiful sandwort
Moenchia erecta (L.) P.G. Gaertn., B. Mey. & Scherb.
  upright chickweed
Moehringia lateriflora (L.) Fenzl
  bluntleaf sandwort
Moehringia macrophylla (Hook.) Fenzl
  largeleaf sandwort
Paronychia ahartii Ertter
  Ahart's nailwort
Paronychia franciscana Eastw.
  San Francisco nailwort
Petrorhagia dubia (Raf.) G. Lopez & Romo
  hairypink
Petrorhagia nanteuilii (Burnat) P.W. Ball & Heywood
  proliferous pink
Petrorhagia prolifera (L.) P.W. Ball & Heywood
  childing pink
Polycarpon depressum Nutt.
  California manyseed
Polycarpon tetraphyllum (L.) L.
  fourleaf manyseed
Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartman
  tuber starwort
Sagina apetala Ard.
  annual pearlwort
Sagina decumbens (Ell.) Torr. & Gray
  beach pearlwort
Sagina decumbens ssp. occidentalis (S. Wats.) Crow
  western pearlwort
Sagina maxima Gray
  stickystem pearlwort
Sagina maxima ssp. crassicaulis (S. Wats.) Crow
  stickystem pearlwort
Saponaria officinalis L.
  bouncingbet
Sagina procumbens L.
  birdeye pearlwort
Sagina saginoides (L.) Karst.
  arctic pearlwort
Scleranthus annuus L.
  German knotgrass
Scopulophila rixfordii (Brandeg.) Munz & Johnston
  Rixford's rockwort
Silene antirrhina L.
  sleepy silene
Silene aperta Greene
  naked catchfly
Silene bernardina S. Wats.
  Palmer's catchfly
Silene bernardina ssp. bernardina S. Wats.
  Palmer's catchfly
Silene bernardina ssp. maguirei Bocquet
  Maguire's catchfly
Silene bernardina ssp. maguirei var. rigidula (B.L. Robins.) Tiehm
  mountain silene
Silene bernardina ssp. maguirei var. sierrae (C.L. Hitchc. & Maguire) Bocquet
  Palmer's catchfly
Silene bridgesii Rohrb.
  Bridges' catchfly
Silene californica Dur.
  Indian pink
Silene campanulata S. Wats.
  Red Mountain catchfly
Silene campanulata ssp. campanulata S. Wats.
  Red Mountain catchfly
Silene campanulata ssp. glandulosa C.L. Hitchc. & Maguire
  Red Mountain catchfly
Silene campanulata ssp. greenei (S. Wats.) C.L. Hitchc. & Maguire
  Greene's catchfly
Silene conoidea L.
  weed silene
Silene dichotoma Ehrh.
  dichotoma silene
Silene douglasii Hook.
  Douglas's campion
Silene douglasii var. douglasii Hook.
  Douglas's campion
Silene gallica L.
  common catchfly
Silene grayi S. Wats.
  Maui catchfly
Silene hookeri Nutt.
  Hooker's silene
Silene hookeri ssp. bolanderi (Gray) Abrams
  Bolander's silene
Silene hookeri ssp. hookeri Nutt.
  Hooker's silene
Silene hookeri ssp. pulverulenta (M.E. Peck) C.L. Hitchc. & Maguire
  Hooker's silene
Silene invisa C.L. Hitchc. & Maguire
  red fir catchfly
Silene laciniata Cav.
  Mexican campion
Silene latifolia Poir.
  bladder campion
Silene laciniata ssp. major var. angustifolia C.L. Hitchc. & Maguire
  cardinal catchfly
Silene latifolia ssp. alba (P. Mill.) Greuter & Burdet
  bladder campion
Silene laciniata ssp. major var. latifolia C.L. Hitchc. & Maguire
  cardinal catchfly
Silene laciniata ssp. major C.L. Hitchc. & Maguire
  cardinal catchfly
Silene lemmonii S. Wats.
  Lemmon's catchfly
Silene marmorensis Kruckeberg
  Marble Mountain catchfly
Silene menziesii Hook.
  Menzies' campion
Silene menziesii ssp. dorrii (Kellogg) C.L. Hitchc. & Maguire
  Dorr's 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 multinervia S. Wats.
  manynerve catchfly
Silene noctiflora L.
  nightflowering silene
Silene nuda (S. Wats.) C.L. Hitchc. & Maguire
  barestem silene
Silene nuda ssp. insectivora (Henderson) C.L. Hitchc. & Maguire
  insecteating silene
Silene nuda ssp. nuda (S. Wats.) C.L. Hitchc. & Maguire
  western fringed catchfly
Silene occidentalis S. Wats.
  western catchfly
Silene occidentalis ssp. longistipitata C.L. Hitchc. & Maguire
  western catchfly
Silene occidentalis ssp. occidentalis S. Wats.
  western catchfly
Silene oregana S. Wats.
  Oregon silene
Silene parishii S. Wats.
  Parish's catchfly
Silene parishii var. latifolia C.L. Hitchc. & Maguire
  Parish's catchfly
Silene parishii var. parishii S. Wats.
  Parish's catchfly
Silene parishii var. viscida C.L. Hitchc. & Maguire
  Parish's catchfly
Silene sargentii S. Wats.
  Sargent's catchfly
Silene scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri var. pacifica (Eastw.) C.L. Hitchc.
  Scouler's campion
Silene scouleri ssp. scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri var. scouleri Hook.
  Scouler's campion
Silene suksdorfii B.L. Robins.
  Suksdorf's silene
Silene uralensis (Rupr.) Bocquet
  apetalous catchfly
Silene uralensis ssp. montana (S. Wats.) McNeill
  apetalous catchfly
Silene verecunda S. Wats.
  San Francisco campion
Silene verecunda ssp. andersonii (Clokey) C.L. Hitchc. & Maguire
  Anderson's campion
Silene verecunda ssp. platyota var. eglandulosa C.L. Hitchc. & Maguire
  San Francisco campion
Silene verecunda ssp. platyota (S. Wats.) C.L. Hitchc. & Maguire
  San Francisco campion
Silene verecunda ssp. platyota var. platyota (S. Wats.) Jepson
  San Francisco campion
Silene verecunda ssp. verecunda S. Wats.
  San Francisco campion
Silene vulgaris (Moench) Garcke
  maidenstears
Spergula arvense L.
  corn spurry
Spergularia atrosperma R.P. Rossb.
  blackseed sandspurry
Spergularia bocconii (Scheele) Foucaud ex Merino
  Boccone's sandspurry
Spergularia canadensis (Pers.) G. Don
  Canadian sandspurry
Spergularia canadensis var. occidentalis R.P. Rossb.
  western sandspurry
Spergularia macrotheca (Hornem.) Heynh.
  sticky sandspurry
Spergularia maritima (All.) Chiov.
  media sandspurry
Spergularia macrotheca var. leucantha (Greene) B.L. Robins.
  sticky sandspurry
Spergularia macrotheca var. longistyla R.P. Rossb.
  sticky sandspurry
Spergularia macrotheca var. macrotheca (Hornem.) Heynh.
  sticky sandspurry
Spergularia platensis (Camb.) Fenzl
  La Plata 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
Spergularia salina var. tenuis (Greene) Jepson
  salt sandspurry
Spergularia villosa (Pers.) Camb.
  hairy sandspurry
Stellaria borealis Bigelow
  boreal starwort
Stellaria borealis ssp. borealis Bigelow
  boreal starwort
Stellaria borealis ssp. sitchana (Steud.) Piper
  Sitka starwort
Stellaria calycantha (Ledeb.) Bong.
  northern starwort
Stellaria crispa Cham. & Schlecht.
  curled starwort
Stellaria graminea L.
  grasslike starwort
Stellaria jamesiana Torr.
  = Pseudostellaria jamesiana
Stellaria littoralis Torr.
  beach 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
Velezia rigida L.
  velezia

CELASTRACEAE
Euonymus occidentalis Nutt. ex Torr.
  western wahoo
Euonymus occidentalis var. occidentalis Nutt. ex Torr.
  western wahoo
Euonymus occidentalis var. parishii (Trel.) Jepson
  western wahoo
Mortonia scabrella var. utahensis Coville ex Gray
  = Mortonia utahensis
Mortonia utahensis (Coville ex Gray) A. Nels.
  Utah mortonia
Paxistima myrsinites (Pursh) Raf.
  boxleaf myrtle

CERATOPHYLLACEAE
Ceratophyllum demersum L.
  coon's tail

CHENOPODIACEAE
Allenrolfea occidentalis (S. Wats.) Kuntze
  iodinebush
Aphanisma blitoides Nutt. ex Moq.
  San Diego coastalcreeper
Arthrocnemum subterminale (Parish) Standl.
  Parish's glasswort
Atriplex argentea Nutt.
  silverscale saltbush
Atriplex argentea ssp. argentea Nutt.
  silverscale saltbush
Atriplex argentea ssp. expansa (S. Wats.) Hall & Clements
  silverscale saltbush
Atriplex californica Moq.
  California saltbush
Atriplex canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex canescens var. canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex confertifolia (Torr. & Frem.) S. Wats.
  shadscale saltbush
Atriplex cordulata Jepson
  heartscale
Atriplex coronata S. Wats.
  crownscale
Atriplex coulteri (Moq.) D. Dietr.
  Coulter's saltbush
Atriplex coronata var. notatior Jepson
  crownscale
Atriplex elegans (Moq.) D. Dietr.
  wheelscale saltbush
Atriplex elegans var. fasciculata (S. Wats.) M.E. Jones
  wheelscale saltbush
Atriplex falcata (M.E. Jones) Standl.
  sickle saltbush
Atriplex fruticulosa Jepson
  ball saltbush
Atriplex gmelinii C.A. Mey. ex Bong.
  Gmelin's saltbush
Atriplex hortensis L.
  garden orache
Atriplex hymenelytra (Torr.) S. Wats.
  desertholly
Atriplex joaquiniana A. Nels.
Atriplex lentiformis (Torr.) S. Wats.
  big saltbush
Atriplex leucophylla (Moq.) D. Dietr.
  beach saltbush
Atriplex lentiformis ssp. breweri (S. Wats.) Hall & Clements
  quailbush
Atriplex lentiformis ssp. lentiformis (Torr.) S. Wats.
  big saltbush
Atriplex lindleyi Moq.
  Lindley's saltbush
Atriplex linearis S. Wats.
  thinleaf fourwing saltbush
Atriplex micrantha Ledeb.
  twoscale saltbush
Atriplex nummularia Lindl.
  bluegreen saltbush
Atriplex pacifica A. Nels.
  Davidson's saltbush
Atriplex parishii S. Wats.
  Parish's saltbush
Atriplex parryi S. Wats.
  Parry's saltbush
Atriplex patula L.
  spear saltbush
Atriplex patula ssp. patula L.
  spear saltbush
Atriplex phyllostegia (Torr. ex S. Wats.) S. Wats.
  leafcover saltweed
Atriplex polycarpa (Torr.) S. Wats.
  cattle saltbush
Atriplex prostrata Boucher ex DC.
  triangle orache
Atriplex pusilla (Torr. ex S. Wats.) S. Wats.
  smooth saltbush
Atriplex rosea L.
  tumbling saltweed
Atriplex semibaccata R. Br.
  Australian saltbush
Atriplex serenana A. Nels.
  bractscale
Atriplex serenana var. davidsonii (Standl.) Munz
  Davidson's bractscale
Atriplex serenana var. serenana A. Nels.
  bractscale
Atriplex spinifera J.F. Macbr.
  spinescale saltbush
Atriplex suberecta I. Verd.
  peregrine saltbush
Atriplex torreyi (S. Wats.) S. Wats.
  Torrey's saltbush
Atriplex truncata (Torr. ex S. Wats.) Gray
  wedgescale saltbush
Atriplex tularensis Coville
  Tulare saltbush
Atriplex vallicola Hoover
  Lost Hills saltbush
Atriplex vesicaria Heward ex Benth.
  aboriginal saltbush
Atriplex watsonii A. Nels.
  Watson's saltbush
Bassia hyssopifolia (Pallas) Kuntz
  fivehorn smotherweed
Beta vulgaris L.
  common beet
Beta vulgaris ssp. maritima (L.) Arcang.
  sea beet
Chenopodium album L.
  lambsquarters
Chenopodium album var. album L.
  lambsquarters
Chenopodium album var. missouriense (Aellen) I.J. Bassett & C.W. Crompton
  Missouri lambsquarters
Chenopodium ambrosioides L.
  Mexican tea
Chenopodium ambrosioides var. anthelminticum (L.) Aellen
  = Chenopodium ambrosioides var. ambrosioides
Chenopodium ambrosioides var. ambrosioides L.
  Mexican tea
Chenopodium atrovirens Rydb.
  pinyon goosefoot
Chenopodium berlandieri Moq.
  pitseed goosefoot
Chenopodium berlandieri var. sinuatum (J. Murr) H.A. Wahl
  pitseed goosefoot
Chenopodium berlandieri var. zschackii (J. Murr) J. Murr ex Aschers.
  Zschack's goosefoot
Chenopodium botrys L.
  Jerusalem oak goosefoot
Chenopodium carnosulum Moq.
  ridged goosefoot
Chenopodium californicum (S. Wats.) S. Wats.
  California goosefoot
Chenopodium capitatum (L.) Ambrosi
  blite goosefoot
Chenopodium carnosulum var. patagonicum (Phil.) H.A. Wahl
  ridged goosefoot
Chenopodium chenopodioides (L.) Aellen
Chenopodium desiccatum A. Nels.
  aridland goosefoot
Chenopodium fremontii S. Wats.
  Fremont's goosefoot
Chenopodium fremontii var. fremontii S. Wats.
  Fremont's goosefoot
Chenopodium hians Standl.
  hians goosefoot
Chenopodium humile Hook.
  marshland goosefoot
Chenopodium incanum (S. Wats.) Heller
  mealy goosefoot
Chenopodium incanum var. incanum (S. Wats.) Heller
  mealy goosefoot
Chenopodium incanum var. occidentale Crawford
  mealy goosefoot
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
  narrowleaf goosefoot
Chenopodium macrospermum Hook. f.
  largeseed goosefoot
Chenopodium macrospermum var. farinosum (S. Wats.) J.T. Howell
  largeseed goosefoot
Chenopodium macrospermum var. halophilum (Phil.) Standl.
  saltloving goosefoot
Chenopodium multifidum L.
  cutleaf goosefoot
Chenopodium murale L.
  nettleleaf goosefoot
Chenopodium nevadense Standl.
  Nevada goosefoot
Chenopodium opulifolium Schrad. ex Koch & Ziz
  seaport goosefoot
Chenopodium overi Aellen
  Over's goosefoot
Chenopodium polyspermum L.
  manyseed goosefoot
Chenopodium pratericola Rydb.
  desert goosefoot
Chenopodium pumilio R. Br.
  clammy goosefoot
Chenopodium rubrum L.
  red goosefoot
Chenopodium salinum Standl.
  Rocky Mountain goosefoot
Chenopodium simplex (Torr.) Raf.
  mapleleaf goosefoot
Chenopodium strictum Roth
  lateflowering goosefoot
Chenopodium strictum ssp. glaucophyllum (Aellen) Aellen & Just.
  lateflowering goosefoot
Chenopodium vulvaria L.
  stinking goosefoot
Corispermum hyssopifolium L.
  common bugseed
Cycloloma atriplicifolium (Spreng.) Coult.
  winged pigweed
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 californica S. Wats.
  rusty molly kochia
Kochia scoparia (L.) Schrad.
  common kochia
Krascheninnikovia lanata (Pursh) Guldenstaedt
  winterfat
Monolepis nuttalliana (J.A. Schultes) Greene
  Nuttall's povertyweed
Monolepis pusilla Torr. ex S. Wats.
  small monolepis
Monolepis spathulata Gray
  beaver monolepis
Nitrophila mohavensis Munz & Roos
  Amargosa alkaliplant
Nitrophila occidentalis (Moq.) S. Wats.
  western miterwort
Salicornia bigelovii Torr.
  dwarf saltwort
Salsola kali L.
  prickly Russian thistle
Salicornia maritima Wolff & Jefferies
  slender grasswort
Salsola paulsenii Litv.
  barbwire Russian thistle
Salicornia rubra A. Nels.
  red swampfire
Salsola soda L.
  oppositeleaf Russian thistle
Sarcocornia utahensis (Tidestrom) A.J. Scott
  Utah swampfire
Sarcobatus vermiculatus (Hook.) Torr.
  greasewood
Salicornia virginica L.
  Virginia glasswort
Spinacia oleracea L.
  spinach
Suaeda californica S. Wats.
  California seablite
Suaeda calceoliformis (Hook.) Moq.
  Pursh seepweed
Suaeda californica var. californica S. Wats.
  California seablite
Suaeda esteroa Ferren & Whitmore
  seablite
Suaeda moquinii (Torr.) Greene
  Mojave seablite
Suaeda taxifolia (Standl.) Standl.
  seepweed

CISTACEAE
Cistus incanus L.
  hairy rockrose
Cistus incanus ssp. corsicus (Loisel.) Heywood
  hairy rockrose
Cistus incanus ssp. incanus L.
  hairy rockrose
Cistus ladaniferus L.
  gum rockrose
Helianthemum greenei B.L. Robins.
  island rushrose
Helianthemum scoparium Nutt.
  Amador rushrose
Tuberaria guttata (L.) Fourr.
  European frostweed

CLUSIACEAE
Hypericum anagalloides Cham. & Schlecht.
  trailing St. Johnswort
Hypericum calycinum L.
  Aaron's beard
Hypericum canariense L.
  Canary Island St. Johnswort
Hypericum concinnum Benth.
  goldwire
Hypericum formosum ssp. scouleri (Hook.) C.L. Hitchc.
  = Hypericum scouleri ssp. scouleri
Hypericum mutilum L.
  dwarf St. Johnswort
Hypericum perforatum L.
  common St. Johnswort
Hypericum scouleri Hook.
  Scouler's St. Johnswort
Hypericum scouleri ssp. scouleri Hook.
  Scouler's St. Johnswort

COMMELINACEAE
Tradescantia fluminensis Vell.
  smallleaf spiderwort
Tradescantia virginiana L.
  Virginia spiderwort

COMPOSITAE
Acamptopappus shockleyi Gray
  Shockley's goldenhead
Acamptopappus sphaerocephalus (Harvey & Gray ex Gray) Gray
  rayless goldenhead
Acamptopappus sphaerocephalus var. hirtellus Blake
  rayless goldenhead
Acamptopappus sphaerocephalus var. sphaerocephalus (Harvey & Gray ex Gray) Gray
  rayless goldenhead
Achillea borealis Bong.
  = Achillea millefolium var. borealis
Achillea lanulosa Nutt.
  = Achillea millefolium var. occidentalis
Achillea millefolium L.
  common yarrow
Achillea millefolium var. alpicola (Rydb.) Garrett
  common yarrow
Achillea millefolium var. arenicola (Heller) Nobs
  common yarrow
Achillea millefolium var. borealis (Bong.) Farw.
  boreal yarrow
Achillea millefolium var. californica (Pollard) Jepson
  California yarrow
Achillea millefolium var. gigantea (Pollard) Nobs
  giant yarrow
Achillea millefolium var. millefolium L.
  common yarrow
Achillea millefolium var. occidentalis DC.
  western yarrow
Achillea millefolium var. pacifica (Rydb.) G.N. Jones
  Pacific yarrow
Achillea millefolium var. puberula (Rydb.) Nobs
  common yarrow
Achyrachaena mollis Schauer
  blow wives
Acourtia microcephala DC.
  sacapellote
Acroptilon repens (L.) DC.
  hardheads
Adenocaulon bicolor Hook.
  American trailplant
Adenophyllum cooperi (Gray) Strother
  Cooper's dogweed
Adenophyllum porophylloides (Gray) Strother
  San Felipe dogweed
Ageratina adenophora (Spreng.) King & H.E. Robins.
  sticky snakeroot
Ageratina herbacea (Gray) King & H.E. Robins.
  fragrant snakeroot
Ageratina occidentalis (Hook.) King & H.E. Robins.
  western snakeroot
Ageratina shastensis (Taylor & Stebbins) King & H.E. Robins.
  Shasta snakeroot
Ageratum conyzoides L.
  tropical whiteweed
Agoseris apargioides (Less.) Greene
  woolly goat chicory
Agoseris apargioides var. apargioides (Less.) Greene
  woolly goat chicory
Agoseris apargioides var. eastwoodiae (Fedde) Munz
  woolly goat chicory
Agoseris apargioides var. maritima (Sheldon) Q. Jones
Agoseris aurantiaca (Hook.) Greene
  orange agoseris
Agoseris aurantiaca var. aurantiaca (Hook.) Greene
  orange agoseris
Agoseris elata (Nutt.) Greene
  tall agoseris
Agoseris glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. laciniata (D.C. Eat.) Smiley
  false agoseris
Agoseris glauca var. monticola (Greene) Q. Jones ex Cronq.
  pale agoseris
Agoseris grandiflora (Nutt.) Greene
  bigflower agoseris
Agoseris heterophylla (Nutt.) Greene
  annual agoseris
Agoseris heterophylla var. crenulata Jepson
  annual agoseris
Agoseris heterophylla var. heterophylla (Nutt.) Greene
  annual agoseris
Agoseris heterophylla var. turgida (Hall) Jepson
  annual agoseris
Agoseris retrorsa (Benth.) Greene
  spearleaf agoseris
Almutaster pauciflorus (Nutt.) A.& D. Love
Amberboa moschata (L.) DC.
  sweetsultan
Amblyopappus pusillus Hook. & Arn.
  dwarf coastweed
Ambrosia acanthicarpa Hook.
  flatspine burr ragweed
Ambrosia ambrosioides (Cav.) Payne
  ambrosia leaf burr ragweed
Ambrosia artemisiifolia L.
  annual ragweed
Ambrosia chamissonis (Less.) Greene
  silver burr ragweed
Ambrosia chenopodiifolia (Benth.) Payne
  San Diego burr ragweed
Ambrosia confertiflora DC.
  weakleaf burr ragweed
Ambrosia dumosa (Gray) Payne
  white burrobush
Ambrosia eriocentra (Gray) Payne
  woolly fruit burr ragweed
Ambrosia ilicifolia (Gray) Payne
  hollyleaf burr ragweed
Ambrosia psilostachya DC.
  Cuman ragweed
Ambrosia pumila (Nutt.) Gray
  dwarf burr ragweed
Ambrosia trifida L.
  great ragweed
Amphipappus fremontii Torr. & Gray
  Fremont's chaffbush
Amphipappus fremontii ssp. fremontii Torr. & Gray
  Fremont's chaffbush
Amphipappus fremontii ssp. spinosus (A. Nels.) Keck
  Fremont's chaffbush
Anaphalis margaritacea (L.) Benth. & Hook. f.
  western pearlyeverlasting
Ancistrocarphus filagineus Gray
  false neststraw
Anisocoma acaulis Torr. & Gray
  scalebud
Antennaria argentea Benth.
  silver pussytoes
Antennaria corymbosa E. Nels.
  flattop pussytoes
Antennaria densa Greene
  = Antennaria media
Antennaria dimorpha (Nutt.) Torr. & Gray
  low pussytoes
Antennaria flagellaris (Gray) Gray
  whip pussytoes
Antennaria geyeri Gray
  pinewoods pussytoes
Antennaria howellii Greene
  Howell's pussytoes
Antennaria howellii ssp. howellii Greene
  Howell's pussytoes
Antennaria luzuloides Torr. & Gray
  rush pussytoes
Antennaria marginata Greene
  whitemargin pussytoes
Antennaria media Greene
  Rocky Mountain pussytoes
Antennaria microphylla Rydb.
  littleleaf pussytoes
Antennaria racemosa Hook.
  raceme pussytoes
Antennaria rosea Greene
  rosy pussytoes
Antennaria rosea ssp. confinis (Greene) Bayer
  rosy pussytoes
Antennaria rosea ssp. rosea Greene
  rosy pussytoes
Antennaria suffrutescens Greene
  evergreen everlasting
Antennaria umbrinella Rydb.
  umber pussytoes
Anthemis arvensis L.
  corn chamomile
Anthemis cotula L.
  stinking chamomile
Anthemis tinctoria L.
  golden chamomile
Antheropeas lanosum (Gray) Rydb.
  white easterbonnets
Antheropeas wallacei (Gray) Rydb.
  woolly easterbonnets
Arctium lappa L.
  greater burrdock
Arctium minus Bernh.
  lesser burrdock
Arctotis stoechadifolia Berg.
  African daisy
Argyranthemum foeniculum (Willd.) Schultz-Bip.
Arnica X diversifolia Greene (pro sp.)
  rayless arnica
Arnica amplexicaulis Nutt.
  clasping arnica
Arnica cernua T.J. Howell
  serpentine arnica
Arnica chamissonis Less.
  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. bernardina (Greene) Maguire
  chamisso arnica
Arnica chamissonis ssp. foliosa var. incana (Gray) Hulten
  chamisso arnica
Arnica cordifolia Hook.
  heartleaf arnica
Arnica discoidea Benth.
  rayless arnica
Arnica fulgens Pursh
  foothill arnica
Arnica gracilis Rydb.
  smallhead arnica
Arnica latifolia Bong.
  broadleaf arnica
Arnica longifolia D.C. Eat.
  spearleaf arnica
Arnica mollis Hook.
  hairy arnica
Arnica nevadensis Gray
  Nevada arnica
Arnica parryi Gray
  Parry's arnica
Arnica parryi ssp. parryi Gray
  Parry's arnica
Arnica parryi ssp. sonnei (Greene) Maguire
  Sonne's arnica
Arnica rydbergii Greene
  Rydberg's arnica
Arnica sororia Greene
  twin arnica
Arnica spathulata Greene
  Klamath arnica
Arnica venosa Hall
  Shasta County arnica
Arnica viscosa Gray
  Mt. Shasta arnica
Artemisia arbuscula Nutt.
  low sagebrush
Artemisia arbuscula ssp. arbuscula Nutt.
  gray low sagebrush
Artemisia arctica Less.
  boreal sagebrush
Artemisia arctica ssp. arctica Less.
  boreal sagebrush
Artemisia biennis Willd.
  biennial wormwood
Artemisia bigelovii Gray
  Bigelow's sagebrush
Artemisia californica Less.
  California sagebrush
Artemisia campestris L.
  field sagewort
Artemisia campestris ssp. borealis (Pallas) Hall & Clements
  northern sagewort
Artemisia campestris ssp. borealis var. wormskioldii (Bess. ex Hook.) Cronq.
  Wormskiold's wormwood
Artemisia cana Pursh
  silver sagebrush
Artemisia cana ssp. bolanderi (Gray) G.H. Ward
  Bolander's silver sagebrush
Artemisia cana ssp. cana Pursh
  silver sagebrush
Artemisia douglasiana Bess.
  California mugwort
Artemisia dracunculus L.
  false tarragon
Artemisia furcata Bieb.
  forked sagewort
Artemisia ludoviciana Nutt.
  estafiate
Artemisia ludoviciana ssp. albula (Woot.) Keck
  white sagebrush
Artemisia ludoviciana ssp. candicans (Rydb.) Keck
  gray sagewort
Artemisia ludoviciana ssp. incompta (Nutt.) Keck
  mountain sagewort
Artemisia ludoviciana ssp. ludoviciana Nutt.
  estafiate
Artemisia michauxiana Bess.
  Michaux's sagebrush
Artemisia nesiotica Raven
  island sagebrush
Artemisia nova A. Nels.
  black sagebrush
Artemisia palmeri Gray
  San Diego sage
Artemisia pycnocephala (Less.) DC.
  beach wormwood
Artemisia rothrockii Gray
  timberline sagebrush
Artemisia spinescens D.C. Eat.
  bud sagebrush
Artemisia suksdorfii Piper
  coastal wormwood
Artemisia tridentata Nutt.
  big sagebrush
Artemisia tridentata ssp. tridentata Nutt.
  basin big sagebrush
Artemisia tridentata ssp. vaseyana (Rydb.) Beetle
  mountain big sagebrush
Artemisia tripartita Rydb.
  threetip sagebrush
Artemisia tripartita ssp. tripartita Rydb.
  Idaho threetip sagebrush
Aster ascendens Lindl.
  Chile aster
Aster brickellioides var. brickellioides Greene
  brickellbush aster
Aster campestris Nutt.
  meadow aster
Aster campestris var. bloomeri (Gray) Gray
  Bloomer's aster
Aster chilensis Nees
  creeping aster
Aster chilensis var. chilensis Nees
  creeping aster
Aster chilensis var. invenustus (Greene) Jepson
  Pacific aster
Aster chilensis var. medius Jepson
  Pacific aster
Aster defoliatus Parish
  San Bernardino aster
Aster eatonii (Gray) T.J. Howell
  Eaton's 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 greatae Parish
  Greata's aster
Aster hendersonii Fern.
  Lyall aster
Aster integrifolius Nutt.
  thickstem aster
Aster laevis L.
  smooth aster
Aster laevis var. geyeri Gray
  Geyer's smooth aster
Aster lanceolatus Willd.
  white panicle aster
Aster lanceolatus ssp. hesperius (Gray) Semple & Chmielewski
  Siskiyou aster
Aster ledophyllus (Gray) Gray
  Cascade aster
Aster lentus Greene
  Suisun Marsh aster
Aster occidentalis (Nutt.) Torr. & Gray
  western aster
Aster occidentalis var. delectabilis (Hall) Ferris
  delectable aster
Aster occidentalis var. intermedius Gray
  intermediate aster
Aster occidentalis var. occidentalis (Nutt.) Torr. & Gray
  western aster
Aster occidentalis var. parishii (Gray) Ferris
  Parish's aster
Aster occidentalis var. yosemitanus (Gray) Cronq.
  Yosemite aster
Aster oregonensis ssp. oregonensis (Nutt.) Cronq.
  Oregon aster
Aster radulinus Gray
  roughleaf aster
Aster shastensis (Gray) Gray
  = Machaeranthera canescens ssp. canescens var. shastensis
Aster subspicatus Nees
  Douglas aster
Aster subspicatus var. subspicatus Nees
  leafybract aster
Aster subulatus Michx.
  annual saltmarsh aster
Aster subulatus var. ligulatus Shinners
  annual saltmarsh aster
Atrichoseris platyphylla (Gray) Gray
  parachute plant
Baccharis brachyphylla Gray
  shortleaf baccharis
Baccharis douglasii DC.
  saltmarsh baccharis
Baccharis emoryi Gray
  Emory's baccharis
Baccharis pilularis DC.
  coyotebrush
Baccharis pilularis var. pilularis DC.
  coyotebrush
Baccharis plummerae Gray
  Plummer's baccharis
Baccharis salicifolia (Ruiz & Pavon) Pers.
  mule's fat
Baccharis sarothroides Gray
  desertbroom
Baccharis sergiloides Gray
  squaw waterweed baccharis
Baccharis vanessae Beauchamp
  Encinitis falsewillow
Bahia dissecta (Gray) Britt.
  ragleaf bahia
Baileya multiradiata Harvey & Gray ex Gray
  desert marigold
Baileya pauciradiata Harvey & Gray ex Gray
  laxflower
Baileya pleniradiata Harvey & Gray ex Gray
  woolly desert marigold
Balsamita major Desf.
  costmary
Balsamorhiza X terebinthacea (Hook.) Nutt. (pro sp.)
  balsamroot
Balsamorhiza deltoidea Nutt.
  deltoid balsamroot
Balsamorhiza hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza hookeri var. hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza hookeri var. neglecta (Sharp) Cronq.
  neglected balsamroot
Balsamorhiza incana Nutt.
  hoary balsamroot
Balsamorhiza macrolepis Sharp
  California balsamroot
Balsamorhiza macrolepis var. macrolepis Sharp
  California balsamroot
Balsamorhiza macrolepis var. platylepis (Sharp) Ferris
  California balsamroot
Balsamorhiza sagittata (Pursh) Nutt.
  arrowleaf balsamroot
Balsamorhiza sericea W.A. Weber
  silky balsamroot
Balsamorhiza serrata A. Nels. & J.F. Macbr.
  serrate balsamroot
Bebbia juncea (Benth.) Greene
  sweetbush
Bebbia juncea var. aspera Greene
  sweetbush
Bellis perennis L.
  lawndaisy
Bidens cernua L.
  nodding beggartick
Bidens connata Muhl. ex Willd.
  purplestem beggarticks
Bidens frondosa L.
  devil's beggartick
Bidens laevis (L.) B.S.P.
  smooth beggartick
Bidens pilosa L.
  Spanish needles
Bidens vulgata Greene
  big devils beggartick
Blennosperma bakeri Heiser
  Baker's stickyseed
Blennosperma nanum (Hook.) Blake
  common stickyseed
Blennosperma nanum var. nanum (Hook.) Blake
  common stickyseed
Blennosperma nanum var. robustum J.T. Howell
  common stickyseed
Blepharipappus scaber Hook.
  rough eyelashweed
Blepharipappus scaber ssp. laevis (Gray) Keck
  rough eyelashweed
Blepharipappus scaber ssp. scaber Hook.
  rough eyelashweed
Blepharizonia plumosa (Kellogg) Greene
  big tarweed
Blepharizonia plumosa ssp. plumosa (Kellogg) Greene
  big tarweed
Blepharizonia plumosa ssp. viscida Keck
  big tarweed
Brachyactis frondosa (Nutt.) Gray
  leafy rayless aster
Brickellia arguta B.L. Robins.
Brickellia arguta var. arguta B.L. Robins.
Brickellia atractyloides Gray
  spearleaf brickellbush
Brickellia atractyloides var. atractyloides Gray
  spearleaf brickellia
Brickellia californica (Torr. & Gray) Gray
  California brickellbush
Brickellia californica var. californica (Torr. & Gray) Gray
  California brickellbush
Brickellia californica var. jepsonii B.L. Robins.
  Jepson's brickellbush
Brickellia desertorum Coville
Brickellia frutescens Gray
  shrubby brickellbush
Brickellia grandiflora (Hook.) Nutt.
  tasselflower brickellbush
Brickellia greenei Gray
  Greene brickellbush
Brickellia incana Gray
  woolly brickellbush
Brickellia knappiana E. Drew
  Knapp brickellbush
Brickellia longifolia S. Wats.
  longleaf brickellbush
Brickellia longifolia var. multiflora (Kellogg) Cronq.
Brickellia microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia microphylla var. microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia microphylla var. watsonii (B.L. Robins.) Welsh
  Watson's brickellbush
Brickellia nevinii Gray
  Nevin's brickellbush
Brickellia oblongifolia Nutt.
  Mojave brickellbush
Brickellia oblongifolia var. linifolia (D.C. Eat.) B.L. Robins.
  narrowleaf brickellbush
Cacaliopsis nardosmia (Gray) Gray
  silvercrown
Calendula arvensis L.
  field marigold
Calendula officinalis L.
  pot marigold
Calycadenia fremontii Gray
  Fremont's western rosinweed
Calycadenia hispida ssp. hispida (Greene) Greene
  hispid western rosinweed
Calycadenia hooveri G.D. Carr
  Hoover's western rosinweed
Calycadenia mollis Gray
  soft western rosinweed
Calycadenia multiglandulosa DC.
  sticky western rosinweed
Calycadenia oppositifolia (Greene) Greene
  Butte County western rosinweed
Calycadenia pauciflora Gray
  smallflower western rosinweed
Calycadenia spicata (Greene) Greene
  spiked western rosinweed
Calycadenia truncata DC.
  Oregon western rosinweed
Calycadenia truncata ssp. microcephala Hall ex Keck
  Oregon western rosinweed
Calycadenia truncata ssp. scabrella (E. Drew) Keck
  Oregon western rosinweed
Calycadenia truncata ssp. truncata DC.
  Oregon western rosinweed
Calycadenia villosa DC.
  dwarf western rosinweed
Calycoseris parryi Gray
  yellow tackstem
Calycoseris wrightii Gray
  white tackstem
Carduus acanthoides L.
  spiny plumeless thistle
Carduus nutans L.
  nodding plumeless thistle
Carduus nutans ssp. leiophyllus (Petrovic) Stojanov & Stef.
  nodding plumeless thistle
Carduus nutans ssp. nutans L.
  nodding plumeless thistle
Carduus pycnocephalus L.
  Italian plumeless thistle
Carduus tenuiflorus W. Curtis
  winged plumeless thistle
Carthamus lanatus L.
  woolly distaff thistle
Carthamus lanatus ssp. baeticus (Boiss. & Reut.) Nyman
  woolly distaff thistle
Carthamus lanatus ssp. lanatus L.
  woolly distaff thistle
Carthamus tinctorius L.
  safflower
Centaurea biebersteinii DC.
  spotted knapweed
Centaurea calcitrapa L.
  red star thistle
Centaurea calcitrapoides L.
  smallhead star thistle
Centaurea cineraria L.
  dusty miller
Centaurea cyanus L.
  garden cornflower
Centaurea debeauxii Gren. & Godr.
  meadow knapweed
Centaurea debeauxii ssp. thuillieri Dostal
  meadow knapweed
Centaurea diffusa Lam.
  white knapweed
Centaurea diluta Ait.
  North African knapweed
Centaurea eriophora L.
  wild sandheath
Centaurea iberica Trev. ex Spreng.
  Iberian knapweed
Centaurea jacea L.
  brownray knapweed
Centaurea melitensis L.
  Maltese star thistle
Centaurea nigra L.
  lesser knapweed
Centaurea solstitialis L.
  yellow star thistle
Centaurea sulphurea Willd.
  sulphur knapweed
Centaurea triumfettii All.
  squarrose knapweed
Chaenactis alpigena C.W. Sharsmith
  southern Sierran pincushion
Chaenactis artemisiifolia (Harvey & Gray ex Gray) Gray
  white pincushion
Chaenactis carphoclinia Gray
  pebble pincushion
Chaenactis carphoclinia var. carphoclinia Gray
  pebble pincushion
Chaenactis carphoclinia var. peirsonii (Jepson) Munz
  Peirson's pincushion
Chaenactis douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis douglasii var. alpina Gray
  alpine dustymaiden
Chaenactis douglasii var. douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis fremontii Gray
  pincushion flower
Chaenactis glabriuscula DC.
  yellow chaenactis
Chaenactis glabriuscula var. glabriuscula DC.
  yellow pincushion
Chaenactis glabriuscula var. heterocarpha (Torr. & Gray ex Gray) Hall
  yellow pincushion
Chaenactis glabriuscula var. lanosa (DC.) Hall
  yellow pincushion
Chaenactis glabriuscula var. orcuttiana (Greene) Hall
  Orcutt's yellow pincushion
Chaenactis macrantha D.C. Eat.
  bighead dustymaiden
Chaenactis nevadensis (Kellogg) Gray
  Nevada dustymaiden
Chaenactis parishii Gray
  Parish's chaenactis
Chaenactis santolinoides Greene
  Santolina pincushion
Chaenactis stevioides Hook. & Arn.
  Steve's dustymaiden
Chaenactis suffrutescens Gray
  Shasta chaenactis
Chaenactis xantiana Gray
  fleshcolor pincushion
Chaetadelpha Gray ex S. Wats.
  skeletonweed
Chaetadelpha wheeleri Gray ex S. Wats.
  Wheeler's skeletonweed
Chaetopappa ericoides (Torr.) Nesom
  rose heath
Chamaemelum fuscatum (Brot.) Vasc.
  dusky dogfennel
Chamaemelum nobile (L.) All.
  garden dogfennel
Chloracantha spinosa (Benth.) Nesom
  spiny chloracantha
Chondrilla juncea L.
  hogbite
Chrysanthemum balsamita (L.) Baill., non L.
  = Balsamita major
Chrysanthemum carinatum Schousboe
  tricolor daisy
Chrysanthemum coronarium L.
  crowndaisy
Chrysanthemum frutescens L.
  marguerite
Chrysanthemum leucanthemum L.
  = Leucanthemum vulgare
Chrysanthemum parthenium (L.) Bernh.
  = Tanacetum parthenium
Chrysanthemum segetum L.
  corndaisy
Chrysothamnus albidus (M.E. Jones ex Gray) Greene
  whiteflower rabbitbrush
Chrysothamnus depressus Nutt.
  longflower rabbitbrush
Chrysothamnus gramineus Hall
  Panamint rock goldenrod
Chrysothamnus humilis Greene
  Truckee rabbitbrush
Chrysothamnus nauseosus (Pallas ex Pursh) Britt.
  = Ericameria nauseosa ssp. nauseosa var. nauseosa
Chrysothamnus paniculatus (Gray) Hall
  = Ericameria paniculata
Chrysothamnus parryi (Gray) Greene
  = Ericameria parryi var. parryi
Chrysothamnus viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. axillaris (Keck) L.C. Anders.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. puberulus (D.C. Eat.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus var. stenophyllus (Gray) Hall
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Cichorium endivia L.
  cultivated endive
Cichorium intybus L.
  chicory
Cirsium amblylepis Petrak
  Mt. Tamalpais thistle
Cirsium andersonii (Gray) Petrak
  rose thistle
Cirsium andrewsii (Gray) Jepson
  Franciscan thistle
Cirsium arizonicum (Gray) Petrak
  Arizona thistle
Cirsium arizonicum var. nidulum (M.E. Jones) Welsh
  Arizona thistle
Cirsium arvense (L.) Scop.
  Canadian thistle
Cirsium brevistylum Cronq.
  clustered thistle
Cirsium californicum var. californicum Gray
  California thistle
Cirsium callilepis var. callilepis (Greene) Jepson
  fringebract thistle
Cirsium ciliolatum (Henderson) J.T. Howell
  Ashland thistle
Cirsium congdonii Moore & Frankton
  rosette thistle
Cirsium crassicaule (Greene) Jepson
  slough thistle
Cirsium cymosum (Greene) J.T. Howell
  peregrine thistle
Cirsium douglasii DC.
  Douglas' thistle
Cirsium douglasii var. breweri (Petrak) Keil & C. Turner
Cirsium douglasii var. douglasii DC.
  Douglas' thistle
Cirsium drummondii Torr. & Gray
  dwarf thistle
Cirsium eatonii (Gray) B.L. Robins.
  Eaton's thistle
Cirsium foliosum (Hook.) DC.
  elk thistle
Cirsium fontinale (Greene) Jepson
  fountain thistle
Cirsium fontinale var. campylon (H.K. Sharsmith) Pilz ex Keil & C. Turner
Cirsium fontinale var. fontinale (Greene) Jepson
  fountain thistle
Cirsium fontinale var. obispoense J.T. Howell
  fountain thistle
Cirsium humboldtense Rydb.
  Humboldt County thistle
Cirsium hydrophilum (Greene) Jepson
  Suisun thistle
Cirsium hydrophilum var. hydrophilum (Greene) Jepson
  Suisun thistle
Cirsium hydrophilum var. vaseyi (Gray) J.T. Howell
  Vasey's thistle
Cirsium loncholepis Petrak
  la graciosa thistle
Cirsium mendocinum Petrak
  Mendocino thistle
Cirsium mohavense (Greene) Petrak
  Mojave thistle
Cirsium neomexicanum Gray
  New Mexico thistle
Cirsium neomexicanum var. neomexicanum Gray
  New Mexico thistle
Cirsium neomexicanum var. utahense (Petrak) Welsh
  Utah thistle
Cirsium occidentale (Nutt.) Jepson
  cobwebby thistle
Cirsium occidentale var. californicum (Gray) Keil & C. Turner
Cirsium occidentale var. compactum Hoover
  cobwebby thistle
Cirsium occidentale var. occidentale (Nutt.) Jepson
  cobwebby thistle
Cirsium occidentale var. venustum (Greene) Jepson
Cirsium ochrocentrum Gray
  yellowspine thistle
Cirsium pastoris J.T. Howell
  snowy thistle
Cirsium praeteriens J.F. Macbr.
  Palo Alto thistle
Cirsium quercetorum (Gray) Jepson
  Alameda County thistle
Cirsium quercetorum var. quercetorum (Gray) Jepson
  Alameda County thistle
Cirsium quercetorum var. walkerianum (Petrak) Jepson
  Walker's thistle
Cirsium quercetorum var. xerolepis Petrak
  Alameda County thistle
Cirsium remotifolium (Hook.) DC.
  fewleaf thistle
Cirsium remotifolium ssp. oregonense Petrak
Cirsium remotifolium ssp. pseudocarlinoides Petrak
Cirsium remotifolium ssp. remotifolium (Hook.) DC.
Cirsium rhothophilum Blake
  surf thistle
Cirsium scabrum (Poir.) Bonnet & Barratte
  rough thistle
Cirsium tioganum (Congd.) Petrak
  stemless thistle
Cirsium undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium undulatum var. undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium vulgare (Savi) Ten.
  bull thistle
Cnicus benedictus L.
  blessed thistle
Conyza bonariensis (L.) Cronq.
  asthmaweed
Conyza bonariensis var. bonariensis (L.) Cronq.
  asthmaweed
Conyza bonariensis var. leiotheca (Blake) Cuatrec.
  asthmaweed
Conyza canadensis (L.) Cronq.
  Canadian horseweed
Conyza canadensis var. canadensis (L.) Cronq.
  Canadian horseweed
Conyza canadensis var. glabrata (Gray) Cronq.
  Canadian horseweed
Coreopsis bigelovii (Gray) Hall
  Bigelow's tickseed
Coreopsis californica (Nutt.) H.K. Sharsmith
  California tickseed
Coreopsis californica var. californica (Nutt.) H.K. Sharsmith
  California tickseed
Coreopsis calliopsidea (DC.) Gray
  leafstem tickseed
Coreopsis douglasii (DC.) Hall
  Douglas' tickseed
Coreopsis gigantea (Kellogg) Hall
  giant coreopsis
Coreopsis hamiltonii (Elmer) H.K. Sharsmith
  Mt. Hamilton tickseed
Coreopsis lanceolata L.
  lanceleaf tickseed
Coreopsis maritima (Nutt.) Hook. f.
  sea dahlia
Coreopsis stillmanii (Gray) Blake
  Stillman's tickseed
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
Corethrogyne californica var. californica DC.
  California sandaster
Corethrogyne filaginifolia var. filaginifolia (Hook. & Arn.) Nutt.
  common sandaster
Cosmos bipinnatus Cav.
  garden cosmos
Cosmos sulphureus Cav.
  sulphur cosmos
Cotula australis (Sieber) Hook. f.
  Australian waterbuttons
Cotula coronopifolia L.
  common brassbuttons
Crepis acuminata Nutt.
  longleaf hawksbeard
Crepis acuminata ssp. acuminata Nutt.
  longleaf hawksbeard
Crepis bakeri Greene
  Baker's hawksbeard
Crepis bakeri ssp. bakeri Greene
  Baker's hawksbeard
Crepis bakeri ssp. cusickii (Eastw.) Babcock & Stebbins
  Cusick's hawksbeard
Crepis bursifolia L.
  Italian hawksbeard
Crepis capillaris Wallr.
  smooth hawksbeard
Crepis intermedia Gray
  limestone hawksbeard
Crepis modocensis Greene
  Siskiyou hawksbeard
Crepis modocensis ssp. modocensis Greene
  Modoc hawksbeard
Crepis modocensis ssp. subacaulis (Kellogg) Babcock & Stebbins
  Siskiyou hawksbeard
Crepis monticola Coville
  mountain hawksbeard
Crepis nana Richards.
  dwarf alpine hawksbeard
Crepis nana ssp. nana Richards.
  dwarf alpine hawksbeard
Crepis nana ssp. ramosa Babcock
  dwarf alpine hawksbeard
Crepis occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. conjuncta (Jepson) Babcock & Stebbins
  largeflower hawksbeard
Crepis occidentalis ssp. costata (Gray) Babcock & Stebbins
  largeflower hawksbeard
Crepis occidentalis ssp. occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. pumila (Rydb.) Babcock & Stebbins
  largeflower hawksbeard
Crepis pleurocarpa Gray
  nakedstem hawksbeard
Crepis rubra L.
  red hawksbeard
Crepis runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis runcinata ssp. andersonii (Gray) Babcock & Stebbins
  Anderson's hawksbeard
Crepis runcinata ssp. hallii Babcock & Stebbins
  Hall's hawksbeard
Crepis setosa Haller f.
  bristly hawksbeard
Crepis vesicaria L.
  beaked hawksbeard
Crepis vesicaria ssp. taraxacifolia (Thuill.) Thellung ex Schinz & R. Keller
Crocidium multicaule Hook.
  common springgold
Cyanopsis muricata (L.) Dostal
  Morocco knapweed
Cynara cardunculus L.
  cardoon
Cynara scolymus L.
  globe artichoke
Dicoria canescens Gray
  desert twinbugs
Dicoria canescens ssp. canescens Gray
  desert twinbugs
Dicoria canescens ssp. clarkiae (Kennedy) Keck
  desert twinbugs
Dicoria canescens ssp. hispidula (Rydb.) Keck
  desert twinbugs
Dimeresia howellii Gray
  doublet
Dugaldia hoopesii (Gray) Rydb.
  = Hymenoxys hoopesii
Dyssodia papposa (Vent.) A.S. Hitchc.
  fetid marigold
Eastwoodia elegans Brandeg.
  yellow aster
Eatonella nivea (D.C. Eat.) Gray
  white false tickhead
Echinops sphaerocephalus L.
  great globethistle
Eclipta alba (L.) Hassk.
  = Eclipta prostrata
Eclipta prostrata (L.) L.
  false daisy
Encelia californica Nutt.
  California brittlebush
Encelia farinosa Gray ex Torr.
  goldenhills
Encelia farinosa var. farinosa Gray ex Torr.
  goldenhills
Encelia farinosa var. phenicodonta (Blake) I.M. Johnston
  goldenhills
Encelia farinosa var. radians Brandeg. ex Blake
  goldenhills
Encelia frutescens (Gray) Gray
  button brittlebush
Encelia frutescens var. frutescens (Gray) Gray
  button brittlebush
Encelia virginensis A. Nels.
  Virgin River brittlebush
Encelia virginensis var. actonii (Elmer) B.L. Turner
  Acton's brittlebush
Encelia virginensis var. virginensis A. Nels.
  Virgin River brittlebush
Enceliopsis covillei (A. Nels.) Blake
  Panamint daisy
Enceliopsis nudicaulis (Gray) A. Nels.
  nakedstem sunray
Enceliopsis nudicaulis var. nudicaulis (Gray) A. Nels.
  nakedstem sunray
Erechtites glomerata (Desf. ex Poir.) DC.
  cutleaf burnweed
Erechtites minima (Poir.) DC.
  coastal burnweed
Ericameria arborescens (Gray) Greene
  goldenfleece
Ericameria bloomeri (Gray) J.F. Macbr.
  rabbitbush heathgoldenrod
Ericameria brachylepis (Gray) Hall
  chaparral heathgoldenrod
Ericameria cooperi (Gray) Hall
  Cooper's heathgoldenrod
Ericameria cuneata (Gray) McClatchie
  cliff heathgoldenrod
Ericameria cuneata var. cuneata (Gray) McClatchie
  cliff heathgoldenrod
Ericameria cuneata var. macrocephala Urbatsch
  cliff heathgoldenrod
Ericameria cuneata var. spathulata (Gray) Hall
  cliff heathgoldenrod
Ericameria discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria discoidea var. discoidea (Nutt.) Nesom
  whitestem heathgoldenrod
Ericameria ericoides (Less.) Jepson
  California heathgoldenrod
Ericameria fasciculata (Eastw.) J.F. Macbr.
  Eastwood's heathgoldenrod
Ericameria gilmanii (Blake) Nesom
  whiteflower heathgoldenrod
Ericameria greenei (Gray) Nesom
  Greene's heathgoldenrod
Ericameria laricifolia (Gray) Shinners
  turpentine bush
Ericameria linearifolia (DC.) Urbatsch & Wussow
  narrowleaf heathgoldenrod
Ericameria nana Nutt.
  dwarf heathgoldenrod
Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. consimilis (Greene) Nesom & Baird
Ericameria nauseosa ssp. consimilis var. ceruminosa 
Ericameria nauseosa ssp. consimilis var. leiosperma 
Ericameria nauseosa ssp. consimilis var. mohavensis 
Ericameria nauseosa ssp. consimilis var. oreophila 
Ericameria nauseosa ssp. nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa var. bernardina 
Ericameria nauseosa ssp. nauseosa var. hololeuca 
Ericameria nauseosa ssp. nauseosa var. nauseosa 
Ericameria nauseosa ssp. nauseosa var. speciosa 
Ericameria ophitidis (J.T. Howell) Nesom
  serpentine heathgoldenrod
Ericameria palmeri (Gray) Hall
  Palmer's heathgoldenrod
Ericameria palmeri var. pachylepis (Hall) Nesom
  Palmer's heathgoldenrod
Ericameria palmeri var. palmeri (Gray) Hall
  Palmer's heathgoldenrod
Ericameria paniculata (Gray) Rydb.
Ericameria parishii (Greene) Hall
  Parish's heathgoldenrod
Ericameria parryi (Gray) Nesom
Ericameria parryi var. aspra (Greene) Nesom & Baird
Ericameria parryi var. imula (Hall & Clements) Nesom & Baird
Ericameria parryi var. latior (Hall & Clements) Nesom & Baird
Ericameria parryi var. monocephala (A. Nels & Kennedy) Nesom & Baird
Ericameria parryi var. nevadensis (Gray) Nesom & Baird
Ericameria parryi var. parryi (Gray) Nesom
Ericameria parryi var. vulcanica (Greene) Nesom & Baird
Ericameria pinifolia (Gray) Hall
  pinebush
Ericameria suffruticosa (Nutt.) Nesom
  singlehead heathgoldenrod
Ericameria teretifolia (Dur. & Hilg.) Jepson
Erigeron acris L.
Erigeron acris ssp. acris L.
Erigeron acris ssp. acris var. debilis 
Erigeron aequifolius Hall
  Hall's fleabane
Erigeron algidus Jepson
  stalked fleabane
Erigeron aliceae T.J. Howell
  Alice Eastwood's fleabane
Erigeron annuus (L.) Pers.
  eastern daisy fleabane
Erigeron aphanactis (Gray) Greene
  rayless shaggy fleabane
Erigeron aphanactis var. aphanactis (Gray) Greene
  rayless shaggy fleabane
Erigeron aphanactis var. congestus (Greene) Cronq.
  rayless shaggy fleabane
Erigeron argentatus Gray
  silver fleabane
Erigeron austiniae Greene
  dwarf yellow fleabane
Erigeron barbellulatus Greene
  shining fleabane
Erigeron biolettii Greene
  Biolett's erigeron
Erigeron blochmaniae Greene
  Blochman's erigeron
Erigeron bloomeri Gray
  scabland fleabane
Erigeron bloomeri var. bloomeri Gray
  scabland fleabane
Erigeron bloomeri var. nudatus (Gray) Cronq.
  scabland fleabane
Erigeron bloomeri var. pubens Keck
  scabland fleabane
Erigeron breweri Gray
  Brewer's fleabane
Erigeron breweri var. breweri Gray
  Brewer's fleabane
Erigeron breweri var. covillei (Greene) Nesom
  Coville's erigeron
Erigeron breweri var. jacinteus (Hall) Cronq.
  Brewer's fleabane
Erigeron breweri var. porphyreticus (M.E. Jones) Cronq.
  Brewer's fleabane
Erigeron canadensis L.
  = Conyza canadensis var. canadensis
Erigeron cervinus Greene
  Siskiyou fleabane
Erigeron chrysopsidis Gray
  dwarf yellow fleabane
Erigeron clokeyi Cronq.
  Clokey's fleabane
Erigeron compactus Blake
  fernleaf fleabane
Erigeron compositus Pursh
  cutleaf daisy
Erigeron concinnus (Hook. & Arn.) Torr. & Gray
  Navajo fleabane
Erigeron concinnus var. concinnus (Hook. & Arn.) Torr. & Gray
  Navajo fleabane
Erigeron concinnus var. condensatus D.C. Eat.
  Navajo fleabane
Erigeron coulteri Porter
  large mountain fleabane
Erigeron decumbens Nutt.
  Willamette fleabane
Erigeron decumbens var. robustior (Cronq.) Cronq.
  Willamette fleabane
Erigeron divergens Torr. & Gray
  spreading fleabane
Erigeron eatonii Gray
  Eaton's fleabane
Erigeron eatonii var. plantagineus (Greene) Cronq.
  Eaton's fleabane
Erigeron eatonii var. sonnei (Greene) Nesom
Erigeron elegantulus Greene
  blue dwarf fleabane
Erigeron elmeri (Greene) Greene
  Elmer's erigeron
Erigeron filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron filifolius var. filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron foliosus Nutt.
  leafy fleabane
Erigeron foliosus var. confinis (T.J. Howell) Jepson
  leafy fleabane
Erigeron foliosus var. foliosus Nutt.
  leafy fleabane
Erigeron foliosus var. hartwegii (Greene) Jepson
  Hartweg's fleabane
Erigeron glaucus Ker-Gawl.
  seaside fleabane
Erigeron inornatus (Gray) Gray
  California rayless fleabane
Erigeron inornatus var. inornatus (Gray) Gray
  California rayless fleabane
Erigeron karvinskianus DC.
  Latin American fleabane
Erigeron lassenianus Greene
  Mt. Lassen fleabane
Erigeron linearis (Hook.) Piper
  desert yellow fleabane
Erigeron lobatus A. Nels.
  lobed fleabane
Erigeron lonchophyllus Hook.
Erigeron miser Gray
  starved fleabane
Erigeron multiceps Greene
  Kern River fleabane
Erigeron nevadincola Blake
  Nevada fleabane
Erigeron parishii Gray
  Parish's fleabane
Erigeron peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. angustifolius (Gray) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. hirsutus Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. peregrinus var. peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron petrophilus Greene
  cliff fleabane
Erigeron petrophilus var. viscidulus (Gray) Nesom
  rockloving erigeron
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 pygmaeus (Gray) Greene
  pygmy fleabane
Erigeron reductus (Cronq.) Nesom
  fleabane
Erigeron reductus var. angustatus (Gray) Nesom
  fleabane
Erigeron reductus var. reductus (Cronq.) Nesom
  fleabane
Erigeron sanctarum S. Wats.
  saints fleabane
Erigeron strigosus Muhl. ex Willd.
  prairie fleabane
Erigeron strigosus var. septentrionalis (Fern. & Wieg.) Fern.
  prairie fleabane
Erigeron strigosus var. strigosus Muhl. ex Willd.
  prairie fleabane
Erigeron supplex Gray
  supple fleabane
Erigeron tener (Gray) Gray
  slender fleabane
Erigeron uncialis Blake
  lone fleabane
Erigeron uncialis ssp. conjugans (Blake) Cronq.
  lone fleabane
Erigeron uncialis ssp. uncialis Blake
  lone fleabane
Erigeron utahensis Gray
  Utah fleabane
Erigeron vagus Payson
  rambling fleabane
Eriophyllum ambiguum (Gray) Gray
  beautiful woollysunflower
Eriophyllum ambiguum var. ambiguum (Gray) Gray
  beautiful woollysunflower
Eriophyllum ambiguum var. paleaceum (Brandeg.) Ferris
  beautiful woollysunflower
Eriophyllum confertiflorum (DC.) Gray
  yellow yarrow
Eriophyllum confertiflorum var. tanacetiflorum (Greene) Jepson
Eriophyllum congdonii Brandeg.
  Congdon's woollysunflower
Eriophyllum jepsonii Greene
  Jepson's woollysunflower
Eriophyllum lanatum (Pursh) Forbes
  woolly eriophyllum
Eriophyllum lanatum var. achillaeoides (DC.) Jepson
  common woollysunflower
Eriophyllum lanatum var. aphanactis J.T. Howell
  common woollysunflower
Eriophyllum lanatum var. arachnoideum (Fisch. & Ave-Lall.) Jepson
  common woollysunflower
Eriophyllum lanatum var. croceum (Greene) Jepson
  common woollysunflower
Eriophyllum lanatum var. cuneatum (Kellogg) Jepson
  common woollysunflower
Eriophyllum lanatum var. grandiflorum (Gray) Jepson
  common woollysunflower
Eriophyllum lanatum var. hallii Constance
  Hall's woollysunflower
Eriophyllum lanatum var. integrifolium (Hook.) Smiley
  common woollysunflower
Eriophyllum lanatum var. lanceolatum (T.J. Howell) Jepson
  common woollysunflower
Eriophyllum lanatum var. leucophyllum (DC.) W.R. Carter
  common woollysunflower
Eriophyllum lanatum var. obovatum (Greene) Hall
  common woollysunflower
Eriophyllum latilobum Rydb.
  San Mateo woollysunflower
Eriophyllum mohavense (I.M. Johnston) Jepson
  Mojave woollysunflower
Eriophyllum multicaule (DC.) Gray
  manystem woollysunflower
Eriophyllum nevinii Gray
  Nevin's woollysunflower
Eriophyllum nubigenum Greene ex Gray
  Yosemite woollysunflower
Eriophyllum pringlei Gray
  Pringle's woollysunflower
Eriophyllum stoechadifolium Lag.
  seaside woollysunflower
Eucephalus breweri (Gray) Nesom
Eucephalus brickellioides (Greene) Nesom
Eucephalus engelmannii (D.C. Eat.) Greene
Eucephalus glabratus (Greene) Greene
Euchiton gymnocephalus (DC.) A. Anderb.
Euchiton japonicus (Thunb.) A. Anderb.
Eupatorium herbaceum (Gray) Greene
  = Ageratina herbacea
Eupatorium occidentale Hook.
  = Ageratina occidentalis
Euthamia occidentalis Nutt.
  western goldentop
Evax caulescens (Benth.) Gray
  involucrate pygmycudweed
Evax sparsiflora var. sparsiflora (Gray) Jepson
  erect pygmycudweed
Filago arizonica Gray
  Arizona cottonrose
Filago californica Nutt.
  California cottonrose
Filago depressa Gray
  dwarf cottonrose
Filago gallica L.
  narrowleaf cottonrose
Filago minima (Sm.) Pers.
  little cottonrose
Filago pyramidata L.
  broadleaf cottonrose
Flaveria trinervia (Spreng.) C. Mohr
  clustered yellowtops
Franseria 
  = Ambrosia 
Gaillardia aristata Pursh
  common gaillardia
Gaillardia pulchella Foug.
  firewheel
Galinsoga Ruiz & Pavon
  galinsoga
Galinsoga parviflora Cav.
  gallantsoldier
Gamochaeta pensylvanica (Willd.) Cabrera
  Pennsylvania everlasting
Gamochaeta purpurea (L.) Cabrera
  spoonleaf purple everlasting
Gazania linearis (Thunb.) Druce
  treasureflower
Geraea canescens Torr. & Gray
  hairy desertsunflower
Geraea canescens var. canescens Torr. & Gray
  hairy desertsunflower
Geraea viscida (Gray) Blake
  sticky desertsunflower
Glyptopleura marginata D.C. Eat.
  carveseed
Glyptopleura setulosa Gray
  holy dandelion
Gnaphalium palustre Nutt.
  western marsh cudweed
Grindelia aphanactis Rydb.
  = Grindelia nuda var. aphanactis
Grindelia camporum Greene
  Great Valley gumweed
Grindelia camporum var. bracteosa (J.T. Howell) M.A. Lane
  bract gumweed
Grindelia camporum var. camporum Greene
  Great Valley gumweed
Grindelia fraxinopratensis Reveal & Beatley
  Ash Meadows gumweed
Grindelia hirsutula Hook. & Arn.
  hairy gumweed
Grindelia hirsutula ssp. hirsutula Hook. & Arn.
  hairy gumweed
Grindelia hirsutula var. hallii (Steyermark ex Rothrock) M.A. Lane
  Hall's gumweed
Grindelia hirsutula var. hirsutula Hook. & Arn.
  hairy gumweed
Grindelia hirsutula var. maritima (Greene) M.A. Lane
  coastal gumweed
Grindelia integrifolia DC.
  Puget Sound gumweed
Grindelia latifolia Kellogg
  coastal gumweed
Grindelia latifolia var. latifolia Kellogg
  coastal gumweed
Grindelia nana Nutt.
  Idaho gumweed
Grindelia nana var. nana Nutt.
  Idaho gumweed
Grindelia nuda Wood
  curlytop gumweed
Grindelia nuda var. aphanactis (Rydb.) Nesom
  curlytop gumweed
Grindelia nuda var. nuda Wood
  curlytop gumweed
Grindelia papposa Nesom & Suh
Grindelia robusta var. robusta Nutt.
  shore gumweed
Grindelia squarrosa (Pursh) Dunal
  curlycup gumweed
Grindelia squarrosa var. quasiperennis Lunell
  curlycup gumweed
Grindelia squarrosa var. serrulata (Rydb.) Steyermark
  curlycup gumweed
Grindelia stricta DC.
Grindelia stricta var. platyphylla (Greene) M.A. Lane
Grindelia stricta var. stricta DC.
Guizotia abyssinica (L. f.) Cass.
  ramtilla
Gutierrezia californica (DC.) Torr. & Gray
  San Joaquin snakeweed
Gutierrezia microcephala (DC.) Gray
  threadleaf snakeweed
Gutierrezia sarothrae (Pursh) Britt. & Rusby
  broom snakeweed
Haplopappus acaulis (Nutt.) Gray
  = Stenotus acaulis var. acaulis
Haplopappus arborescens (Gray) Hall
  = Ericameria arborescens
Haplopappus carthamoides (Hook.) Gray
  = Pyrrocoma carthamoides var. carthamoides
Haplopappus contractus Hall
  = Pyrrocoma uniflora var. uniflora
Haplopappus cooperi (Gray) Hall
  = Ericameria cooperi
Haplopappus cuneatus Gray
  = Ericameria cuneata var. cuneata
Haplopappus ericoides (Less.) Hook. & Arn.
  = Ericameria ericoides
Haplopappus eximius Hall
  = Tonestus eximius
Haplopappus gracilis (Nutt.) Gray
  = Machaeranthera gracilis
Haplopappus laricifolius Gray
  = Ericameria laricifolia
Haplopappus linearifolius DC.
  = Ericameria linearifolia
Haplopappus lyallii Gray
  = Tonestus lyallii
Haplopappus nanus (Nutt.) D.C. Eat.
  = Ericameria nana
Haplopappus peirsonii (Keck) J.T. Howell
  = Tonestus peirsonii
Haplopappus racemosus (Nutt.) Torr.
  = Pyrrocoma racemosa var. racemosa
Haplopappus spinulosus var. gooddingii (A. Nels.) Blake
  = Machaeranthera pinnatifida ssp. gooddingii var. gooddingii
Haplopappus suffruticosus (Nutt.) Gray
  = Ericameria suffruticosa
Haplopappus uniflorus (Hook.) Torr. & Gray
  = Pyrrocoma uniflora var. uniflora
Hazardia brickellioides (Blake) W.D. Clark
  brickellbush goldenweed
Hazardia cana (Gray) Greene
  island hazardia
Hazardia detonsa (Greene) Greene
  island bristleweed
Hazardia orcuttii (Gray) Greene
  Orcutt's bristleweed
Hazardia squarrosa (Hook. & Arn.) Greene
  sawtooth goldenbush
Hazardia squarrosa var. grindelioides (DC.) W.D. Clark
  sawtooth bristleweed
Hazardia squarrosa var. obtusa (Greene) Jepson
  sawtooth bristleweed
Hazardia squarrosa var. squarrosa (Hook. & Arn.) Greene
  sawtooth goldenbush
Hazardia stenolepis (Hall) Hoover
  serpentine bristleweed
Hazardia whitneyi (Gray) Greene
  Whitney's bristleweed
Hazardia whitneyi var. discoidea (J.T. Howell) W.D. Clark
  Whitney's bristleweed
Hazardia whitneyi var. whitneyi (Gray) Greene
  Whitney's bristleweed
Hecastocleis Gray
  hecastocleis
Hecastocleis shockleyi Gray
  prickleleaf
Hedypnois cretica (L.) Dum.-Cours.
  cretanweed
Helenium amarum (Raf.) H. Rock
  yellowdicks
Helenium autumnale L.
  common sneezeweed
Helenium autumnale var. grandiflorum (Nutt.) Torr. & Gray
  fall sneezeweed
Helenium autumnale var. montanum (Nutt.) Fern.
  mountain sneezeweed
Helenium bigelovii Gray
  Bigelow's sneezeweed
Helenium bolanderi Gray
  coastal sneezeweed
Helenium hoopesii Gray
  = Hymenoxys hoopesii
Helenium puberulum DC.
  rosilla
Helianthella californica Gray
  California helianthella
Helianthella californica var. californica Gray
  California helianthella
Helianthella californica var. nevadensis (Greene) Jepson
  Nevada helianthella
Helianthella californica var. shastensis W.A. Weber
  Shasta helianthella
Helianthella castanea Greene
  Mt. Diablo helianthella
Helianthus annuus L.
  common sunflower
Helianthus bolanderi Gray
  serpentine sunflower
Helianthus californicus DC.
Helianthus ciliaris DC.
  Texas blueweed
Helianthus cusickii Gray
  Cusick's sunflower
Helianthus gracilentus Gray
  slender sunflower
Helianthus maximiliani Schrad.
  Maximilian sunflower
Helianthus niveus (Benth.) Brandeg.
  showy sunflower
Helianthus niveus ssp. canescens (Gray) Heiser
  showy sunflower
Helianthus niveus ssp. tephrodes (Gray) Heiser
  Algodones sunflower
Helianthus nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus nuttallii ssp. nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus nuttallii ssp. parishii (Gray) Heiser
  Parish's sunflower
Helianthus petiolaris Nutt.
  prairie sunflower
Helianthus petiolaris ssp. petiolaris Nutt.
  prairie sunflower
Heliomeris hispida (Gray) Cockerell
  hairy falsegoldeneye
Heliomeris multiflora Nutt.
  showy goldeneye
Heliomeris multiflora var. nevadensis (A. Nels.) Yates
  Nevada goldeneye
Hemizonia arida Keck
  redrock tarweed
Hemizonia clementina Brandeg.
  Catalina tarweed
Hemizonia congesta DC.
  hayfield tarweed
Hemizonia congesta ssp. calyculata Babcock & Hall
Hemizonia congesta ssp. clevelandii (Greene) Babcock & Hall
Hemizonia congesta ssp. congesta DC.
  hayfield tarweed
Hemizonia congesta ssp. luzulifolia (DC.) Babcock & Hall
Hemizonia congesta ssp. tracyi Babcock & Hall
Hemizonia congesta ssp. vernalis (Keck) Tanowitz
  hayfield tarweed
Hemizonia conjugens Keck
  Otay tarweed
Hemizonia corymbosa (DC.) Torr. & Gray
  coastal tarweed
Hemizonia corymbosa ssp. corymbosa (DC.) Torr. & Gray
  coastal tarweed
Hemizonia corymbosa ssp. macrocephala (Nutt.) Keck
  coastal tarweed
Hemizonia fasciculata (DC.) Torr. & Gray
  clustered tarweed
Hemizonia fitchii Gray
  Fitch's tarweed
Hemizonia floribunda Gray
  Tecate tarweed
Hemizonia halliana Keck
  Hall's tarweed
Hemizonia increscens (Hall ex Keck) Tanowitz
  grassland tarweed
Hemizonia increscens ssp. foliosa (Hoover) Tanowitz
  grassland tarweed
Hemizonia increscens ssp. increscens (Hall ex Keck) Tanowitz
  grassland tarweed
Hemizonia increscens ssp. villosa Tanowitz
  grassland tarweed
Hemizonia kelloggii Greene
  Kellogg's tarweed
Hemizonia lobbii Greene
  threeray tarweed
Hemizonia luzulifolia ssp. luzulifolia DC.
  hayfield tarweed
Hemizonia minthornii Jepson
  Santa Susana tarweed
Hemizonia mohavensis Keck
  Mojave tarweed
Hemizonia pallida Keck
  Kern tarweed
Hemizonia paniculata Gray
  San Diego tarweed
Hemizonia parryi Greene
  pappose tarweed
Hemizonia parryi ssp. australis Keck
Hemizonia parryi ssp. congdonii (Robins. & Greenm.) Keck
  Congdon's tarweed
Hemizonia parryi ssp. parryi Greene
  Parry's tarweed
Hemizonia parryi ssp. rudis (Greene) Keck
  pappose tarweed
Hemizonia pentactis (Keck) Keck
  Salinas River tarweed
Hemizonia pungens (Hook. & Arn.) Torr. & Gray
  common spikeweed
Hemizonia pungens ssp. laevis Keck
Hemizonia pungens ssp. maritima (Greene) Keck
  common tarweed
Hemizonia pungens ssp. pungens (Hook. & Arn.) Torr. & Gray
  common tarweed
Hemizonia pungens ssp. septentrionalis Keck
  common tarweed
Hesperevax acaulis (Kellogg) Greene
  hesperevax
Hesperevax acaulis var. acaulis (Kellogg) Greene
  hesperevax
Hesperevax sparsiflora (Gray) Greene
  fewflower hesperevax
Hesperevax sparsiflora var. brevifolia (Gray) Morefield
  shortflower hesperevax
Hesperevax sparsiflora var. sparsiflora (Gray) Greene
  fewflower hesperevax
Heterotheca camphorata (Eastw.) Harms
  = Heterotheca sessiliflora ssp. echioides var. camphorata
Heterotheca grandiflora Nutt.
  telegraphweed
Heterotheca oregona (Nutt.) Shinners
  Oregon goldenaster
Heterotheca oregona var. compacta (Keck) Semple
  Oregon goldenaster
Heterotheca oregona var. oregona (Nutt.) Shinners
  Oregon goldenaster
Heterotheca oregona var. rudis (Greene) Semple
  Oregon goldenaster
Heterotheca oregona var. scaberrima (Gray) Semple
  Oregon goldenaster
Heterotheca sessiliflora (Nutt.) Shinners
  sessileflower falsegoldenaster
Heterotheca sessiliflora ssp. bolanderi (Gray) Semple
Heterotheca sessiliflora ssp. echioides (Nutt.) Shinner
Heterotheca sessiliflora ssp. echioides var. camphorata 
Heterotheca sessiliflora ssp. echioides var. echioides 
Heterotheca sessiliflora ssp. fastigiata (Greene) Semple
Heterotheca sessiliflora ssp. fastigiata var. fastigiata 
Heterotheca subaxillaris (Lam.) Britt. & Rusby
  camphorweed
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 argutum Nutt.
  southern hawkweed
Hieracium argutum var. argutum Nutt.
  southern hawkweed
Hieracium aurantiacum L.
  orange hawkweed
Hieracium bolanderi Gray
  Bolander's hawkweed
Hieracium cynoglossoides Arv.-Touv.
  houndstongue hawkweed
Hieracium gracile Hook.
  slender hawkweed
Hieracium gracile var. detonsum (Gray) Gray
  low alpine hawkweed
Hieracium gracile var. gracile Hook.
  slender hawkweed
Hieracium greenei Gray
  Greene's hawkweed
Hieracium horridum Fries
  prickly hawkweed
Hieracium scouleri Hook.
  woollyweed
Hieracium scouleri var. nudicaule (Gray) Cronq.
  woollyweed
Hieracium scouleri var. scouleri Hook.
  Scouler's woollyweed
Holocarpha heermannii (Greene) Keck
  Heermann's tarweed
Holocarpha macradenia (DC.) Greene
  Santa Cruz tarplant
Holocarpha obconica (J.C. Clausen & Keck) Keck
  San Joaquin tarweed
Holocarpha obconica ssp. autumnalis Keck
  San Joaquin tarweed
Holocarpha obconica ssp. obconica (J.C. Clausen & Keck) Keck
  San Joaquin tarweed
Holocarpha virgata (Gray) Keck
  yellowflower tarweed
Holocarpha virgata ssp. elongata Keck
  wand tarbush
Holocarpha virgata ssp. virgata (Gray) Keck
  yellowflower tarweed
Holozonia filipes (Hook. & Arn.) Greene
  whitecrown
Hulsea algida Gray
  pain hulsea
Hulsea brevifolia Gray
  shortleaf alpinegold
Hulsea californica Torr. & Gray
  San Diego alpinegold
Hulsea heterochroma Gray
  redray alpinegold
Hulsea mexicana Rydb.
  Mexican alpinegold
Hulsea nana Gray
  dwarf alpinegold
Hulsea vestita Gray
  pumice alpinegold
Hulsea vestita ssp. callicarpha (Hall) Wilken
  pumice alpinegold
Hulsea vestita ssp. gabrielensis Wilken
  pumice alpinegold
Hulsea vestita ssp. inyoensis (Keck) Wilken
  pumice alpinegold
Hulsea vestita ssp. parryi (Gray) Wilken
  Parry's alpinegold
Hulsea vestita ssp. pygmaea (Gray) Wilken
  pygmy alpinegold
Hulsea vestita ssp. vestita Gray
  pumice alpinegold
Hymenoclea monogyra Torr. & Gray ex Gray
  singlewhorl burrobush
Hymenoclea salsola Torr. & Gray ex Gray
  white burrobush
Hymenoclea salsola var. fasciculata (A. Nels.) K.M. Peterson & Payne
  white burrobush
Hymenoclea salsola var. pentalepis (Rydb.) L. Benson
  white burrobush
Hymenoclea salsola var. salsola Torr. & Gray ex Gray
  white burrobush
Hymenopappus filifolius Hook.
  fineleaf hymenopappus
Hymenopappus filifolius var. eriopodus (A. Nels.) B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. lugens (Greene) Jepson
  Idaho hymenopappus
Hymenopappus filifolius var. megacephalus B.L. Turner
  fineleaf hymenopappus
Hymenopappus filifolius var. nanus (Rydb.) B.L. Turner
  fineleaf hymenopappus
Hymenothrix loomisii Blake
  Loomis' thimblehead
Hymenothrix wrightii Gray
  Wright's thimblehead
Hymenoxys cooperi (Gray) Cockerell
  Cooper's hymenoxys
Hymenoxys cooperi var. canescens (D.C. Eat.) Parker
  Cooper's hymenoxys
Hymenoxys cooperi var. cooperi (Gray) Cockerell
  Cooper's hymenoxys
Hymenoxys hoopesii (Gray) Bierner
Hymenoxys lemmonii (Greene) Cockerell
  Lemmon's rubberweed
Hymenoxys odorata DC.
  bitter rubberweed
Hypochaeris glabra L.
  smooth catsear
Hypochaeris radicata L.
  hairy catsear
Inula helenium L.
  elecampane inula
Ionactis alpina (Nutt.) Greene
  alpine ionactis
Isocoma acradenia (Greene) Greene
  alkali jimmyweed
Isocoma acradenia var. acradenia (Greene) Greene
  alkali goldenbush
Isocoma acradenia var. bracteosa (Greene) Nesom
  alkali goldenbush
Isocoma acradenia var. eremophila (Greene) Nesom
  alkali goldenbush
Isocoma arguta Greene
  jimmyweed
Isocoma menziesii (Hook. & Arn.) Nesom
  Menzies' jimmyweed
Isocoma menziesii var. decumbens (Greene) Nesom
  Menzies' jimmyweed
Isocoma menziesii var. menziesii (Hook. & Arn.) Nesom
  Menzies' jimmyweed
Isocoma menziesii var. sedoides (Greene) Nesom
  Menzies' jimmyweed
Isocoma menziesii var. vernonioides (Nutt.) Nesom
  Menzies' jimmyweed
Iva axillaris Pursh
  povertyweed
Iva hayesiana Gray
  San Diego povertyweed
Iva nevadensis M.E. Jones
  Nevada sumpweed
Jaumea carnosa (Less.) Gray
  marsh jaumea
Lactuca biennis (Moench) Fern.
  tall blue lettuce
Lactuca canadensis L.
  Canada lettuce
Lactuca canadensis var. canadensis L.
  Canada lettuce
Lactuca canadensis var. longifolia (Michx.) Farw.
  Canada lettuce
Lactuca ludoviciana (Nutt.) Riddell
  biannual lettuce
Lactuca saligna L.
  willowleaf lettuce
Lactuca sativa L.
  garden lettuce
Lactuca scariola L.
  = Lactuca serriola
Lactuca serriola L.
  prickly lettuce
Lactuca tatarica (L.) C.A. Mey.
  blue lettuce
Lactuca tatarica var. pulchella (Pursh) Breitung
  blue lettuce
Laennecia coulteri (Gray) Nesom
  conyza
Lagophylla dichotoma Benth.
  forked hareleaf
Lagophylla glandulosa Gray
  glandular hareleaf
Lagophylla glandulosa ssp. glandulosa Gray
  glandular hareleaf
Lagophylla minor (Keck) Keck
  lesser hareleaf
Lagophylla ramosissima Nutt.
  branched lagophylla
Lagophylla ramosissima ssp. congesta (Greene) Keck
  branched lagophylla
Lapsana communis L.
  common nipplewort
Lasthenia burkei (Greene) Greene
  Burke's baeria
Lasthenia californica DC. ex Lindl.
  California goldfields
Lasthenia chrysantha (Greene ex Gray) Greene
  alkalisink goldfields
Lasthenia conjugens Greene
  Contra Costa goldfields
Lasthenia coronaria (Nutt.) Ornduff
  royal goldfields
Lasthenia debilis (Greene ex Gray) Ornduff
  Greene's goldfields
Lasthenia ferrisiae Ornduff
  Ferris' goldfields
Lasthenia fremontii (Torr. ex Gray) Greene
  Fremont's goldfields
Lasthenia glaberrima DC.
  smooth goldfields
Lasthenia glabrata Lindl.
  yellowray goldfields
Lasthenia glabrata ssp. coulteri (Gray) Ornduff
  Coulter's goldfields
Lasthenia glabrata ssp. glabrata Lindl.
  yellowray goldfields
Lasthenia leptalea (Gray) Ornduff
  Salinas Valley goldfields
Lasthenia macrantha (Gray) Greene
  pickleweed
Lasthenia macrantha ssp. bakeri (J.T. Howell) Ornduff
  Baker's goldfields
Lasthenia macrantha ssp. macrantha (Gray) Greene
  perennial goldfields
Lasthenia maritima (Gray) Ornduff
  seaside goldfields
Lasthenia microglossa (DC.) Greene
  smallray goldfields
Lasthenia minor (DC.) Ornduff
  coastal goldfields
Lasthenia platycarpha (Gray) Greene
  alkali goldfields
Layia carnosa (Nutt.) Torr. & Gray
  beach tidytips
Layia chrysanthemoides (DC.) Gray
  smooth tidytips
Layia chrysanthemoides ssp. chrysanthemoides (DC.) Gray
  smooth tidytips
Layia discoidea (Keck) Keck
  rayless tidytips
Layia fremontii (Torr. & Gray) Gray
  Fremont's tidytips
Layia gaillardioides (Hook. & Arn.) DC.
  woodland tidytips
Layia glandulosa (Hook.) Hook. & Arn.
  whitedaisy tidytips
Layia glandulosa ssp. glandulosa (Hook.) Hook. & Arn.
  whitedaisy tidytips
Layia heterotricha (DC.) Hook. & Arn.
  paleyellow tidytips
Layia hieracioides (DC.) Hook. & Arn.
  tall tidytips
Layia jonesii Gray
  Jones' tidytips
Layia leucopappa Keck
  Comanche Point tidytips
Layia munzii Keck
  Munz's tidytips
Layia pentachaeta Gray
  Sierran tidytips
Layia pentachaeta ssp. albida Keck
  Sierran tidytips
Layia pentachaeta ssp. pentachaeta Gray
  Sierran tidytips
Layia platyglossa (Fisch. & C.A. Mey.) Gray
  coastal tidytips
Layia platyglossa ssp. platyglossa (Fisch. & C.A. Mey.) Gray
  coastal tidytips
Layia septentrionalis Keck
  Colusa tidytips
Lembertia congdonii (Gray) Greene
  San Joaquin woollythread
Leontodon hirtus L.
  rough hawkbit
Leontodon taraxacoides (Vill.) Merat
  lesser hawkbit
Lepidospartum latisquamum S. Wats.
  Nevada broomsage
Lepidospartum squamatum (Gray) Gray
  California broomsage
Lessingia arachnoidea Greene
Lessingia filaginifolia (Hook. & Arn.) M.A. Lane
Lessingia filaginifolia var. californica (DC.) M.A. Lane
Lessingia filaginifolia var. filaginifolia (Hook. & Arn.) M.A. Lane
Lessingia germanorum Cham.
  San Francisco vinegarweed
Lessingia germanorum var. germanorum Cham.
  San Francisco vinegarweed
Lessingia glandulifera Gray
  valley vinegarweed
Lessingia glandulifera var. glandulifera Gray
  valley vinegarweed
Lessingia glandulifera var. pectinata (Greene) Jepson
  valley vinegarweed
Lessingia glandulifera var. tomentosa (Greene) Ferris
  valley vinegarweed
Lessingia hololeuca Greene
  woollyhead vinegarweed
Lessingia hololeuca var. hololeuca Greene
  woollyhead vinegarweed
Lessingia lemmonii Gray
  Lemmon's vinegarweed
Lessingia lemmonii var. lemmonii Gray
  Lemmon's vinegarweed
Lessingia lemmonii var. peirsonii (J.T. Howell) Ferris
  Peirson's vinegarweed
Lessingia lemmonii var. ramulosissima (A. Nels.) Ferris
  Lemmon's vinegarweed
Lessingia leptoclada Gray
  Sierran vinegarweed
Lessingia micradenia Greene
  Mt. Tamalpais vinegarweed
Lessingia micradenia var. glabrata (Keck) Ferris
  Mt. Tamalpais vinegarweed
Lessingia micradenia var. micradenia Greene
  Mt. Tamalpais vinegarweed
Lessingia nana Gray
  dwarf vinegarweed
Lessingia nemaclada Greene
  slenderstem vinegarweed
Lessingia nemaclada var. albiflora (Eastw.) J.T. Howell
  slenderstem vinegarweed
Lessingia nemaclada var. mendocina (Greene) J.T. Howell
  Mendocino vinegarweed
Lessingia nemaclada var. nemaclada Greene
  slenderstem vinegarweed
Lessingia occidentalis (Hall) M.A. Lane
Lessingia ramulosa Gray
  Sonoma vinegarweed
Lessingia ramulosa var. adenophora (Greene) Gray
  Sonoma vinegarweed
Lessingia ramulosa var. ramulosa Gray
  Sonoma vinegarweed
Lessingia tenuis (Gray) Coville
Lessingia virgata Gray
  wand vinegarweed
Lessingia virgata var. glomerata (Greene) J.T. Howell
  wand vinegarweed
Lessingia virgata var. virgata Gray
  wand vinegarweed
Leucanthemum leucanthemum (L.) Rydb.
  = Leucanthemum vulgare
Leucanthemum vulgare Lam.
  oxeyedaisy
Luina hypoleuca Benth.
  littleleaf silverback
Lygodesmia 
  = Stephanomeria 
Machaeranthera arida B.L. Turner & Horne
  arid 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 canescens ssp. canescens var. incana (Lindl.) Gray
  cutleaf goldenweed
Machaeranthera canescens ssp. canescens var. leucanthemifolia (Greene) Welsh
  whiteflower machaeranthera
Machaeranthera canescens ssp. canescens var. shastensis (Gray) B.L. Turner
  Shasta machaeranthera
Machaeranthera canescens ssp. canescens var. ziegleri (Munz) B.L. Turner
  Ziegler's machaeranthera
Machaeranthera carnosa (Gray) Nesom
  shrubby alkali aster
Machaeranthera coulteri (Gray) B.L. Turner & Horne
  Silver Lake daisy
Machaeranthera gracilis (Nutt.) Shinners
  slender goldenweed
Machaeranthera juncea (Greene) Shinners
  rush bristleweed
Machaeranthera pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera pinnatifida ssp. gooddingii (A. Nels.) B.L. Turner & Hartman
  Goodding's aster
Machaeranthera pinnatifida ssp. gooddingii var. gooddingii (A. Nels.) B.L. Turner & Hartman
  Goodding's aster
Machaeranthera tanacetifolia (Kunth) Nees
  tanseyleaf aster
Madia anomala Greene
  plumpseeded madia
Madia bolanderi (Gray) Gray
  Bolander's madia
Madia citrigracilis Keck
  Shasta tarweed
Madia citriodora Greene
  lemonscented madia
Madia doris-nilesiae T.W. & J.P. Nelson
  serpentine tarweed
Madia elegans D. Don ex Lindl.
  common madia
Madia elegans ssp. densifolia (Greene) Keck
  showy tarweed
Madia elegans ssp. elegans D. Don ex Lindl.
  common madia
Madia elegans ssp. vernalis Keck
  spring madia
Madia elegans ssp. wheeleri (Gray) Keck
  Wheeler's tarweed
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 hallii Keck
  Hall's madia
Madia madioides (Nutt.) Greene
  woodland madia
Madia minima (Gray) Keck
  oppositeleaved tarweed
Madia nutans (Greene) Keck
  nodding madia
Madia radiata Kellogg
  golden madia
Madia rammii Greene
  Ramm's madia
Madia sativa Molina
  coast tarweed
Madia stebbinsii T.W. & J.P. Nelson
  Stebbins' tarweed
Madia subspicata Keck
  slender tarweed
Madia yosemitana Parry ex Gray
  Yosemite tarweed
Malacothrix californica DC.
  California desertdandelion
Malacothrix clevelandii Gray
  Cleveland's desertdandelion
Malacothrix coulteri Harvey & Gray
  snake's head
Malacothrix floccifera (DC.) Blake
  woolly desertdandelion
Malacothrix foliosa Gray
  leafy desertdandelion
Malacothrix foliosa ssp. foliosa Gray
  leafy desertdandelion
Malacothrix glabrata (Gray ex D.C. Eat.) Gray
  smooth desertdandelion
Malacothrix incana (Nutt.) Torr. & Gray
  dandelion
Malacothrix indecora Greene
  Santa Cruz Island desertdandelion
Malacothrix saxatilis (Nutt.) Torr. & Gray
  cliffaster
Malacothrix saxatilis var. arachnoidea (McGregor) E. Williams
  cliff desertdandelion
Malacothrix saxatilis var. commutata (Torr. & Gray) Ferris
  cliff desertdandelion
Malacothrix saxatilis var. implicata (Eastw.) Hall
  cliff desertdandelion
Malacothrix saxatilis var. saxatilis (Nutt.) Torr. & Gray
  cliff desertdandelion
Malacothrix saxatilis var. tenuifolia (Nutt.) Gray
  cliff desertdandelion
Malacothrix similis W.S. Davis & Raven
  twin desertdandelion
Malacothrix sonchoides (Nutt.) Torr. & Gray
  sowthistle desertdandelion
Malacothrix squalida Greene
  Santa Cruz desertdandelion
Malacothrix stebbinsii W.S. Davis & Raven
  Stebbins' desertdandelion
Malacothrix torreyi Gray
  Torrey's desertdandelion
Malperia tenuis S. Wats.
  brownturbans
Mantisalca salmantica (L.) Briq. & Cavillier
  dagger flower
Matricaria discoidea DC.
  disc mayweed
Matricaria matricarioides (Less.) Porter
  = Matricaria discoidea
Matricaria occidentalis Greene
  valley mayweed
Melampodium perfoliatum (Cav.) Kunth
  perfoliate blackfoot
Micropus amphibola Gray
  micropus
Micropus californicus Fisch. & C.A. Mey.
  q tips
Micropus californicus var. californicus Fisch. & C.A. Mey.
  slender cottonweed
Micropus californicus var. subvestitus Gray
  slender cottonweed
Microseris acuminata Greene
  Sierran foothill silverpuffs
Microseris bigelovii (Gray) Schultz-Bip.
  coastal silverpuffs
Microseris borealis (Bong.) Schultz-Bip.
  apargidium
Microseris campestris Greene
  San Joaquin silverpuffs
Microseris douglasii (DC.) Schultz-Bip.
  Douglas' silverpuffs
Microseris douglasii ssp. douglasii (DC.) Schultz-Bip.
  Douglas' silverpuffs
Microseris douglasii ssp. platycarpha (Gray) Chambers
  Douglas' silverpuffs
Microseris douglasii ssp. tenella (Gray) Chambers
  Douglas' silverpuffs
Microseris elegans Greene ex Gray
  elegant silverpuffs
Microseris howellii Gray
  Howell's silverpuffs
Microseris laciniata (Hook.) Schultz-Bip.
  cutleaf silverpuffs
Microseris laciniata ssp. laciniata (Hook.) Schultz-Bip.
  cutleaf silverpuffs
Microseris laciniata ssp. leptosepala (Nutt.) Chambers
  cutleaf silverpuffs
Microseris laciniata var. siskiyouensis Chambers
Microseris nutans (Hook.) Schultz-Bip.
  nodding microceris
Microseris nutans ssp. nutans (Hook.) Schultz-Bip.
  nodding silverpuffs
Microseris paludosa (Greene) J.T. Howell
  marsh silverpuffs
Microseris sylvatica (Benth.) Schultz-Bip.
  sylvan scorzonella
Monolopia gracilens Gray
  woodland false turtleback
Monolopia lanceolata Nutt.
  common false turtleback
Monolopia major DC.
  cupped false turtleback
Monolopia stricta Crum
  Crum's false turtleback
Monoptilon bellidiforme Torr. & Gray ex Gray
  daisy desertstar
Monoptilon bellioides (Gray) Hall
  Mojave desertstar
Nicolletia occidentalis Gray
  Mojave hole in the sand plant
Nothocalais alpestris (Gray) Chambers
  alpine lake prairiedandelion
Nothocalais troximoides (Gray) Greene
  weevil microseris
Onopordum acanthium L.
  Scotch cottonthistle
Onopordum tauricum Willd.
  taurus cottonthistle
Oreostemma alpigenum (Torr. & Gray) Nesom
Oreostemma alpigenum var. alpigenum (Torr. & Gray) Nesom
Oreostemma alpigenum var. andersonii (Gray) Nesom
Oreostemma elatum (Greene) Greene
Oreostemma peirsonii (C.W. Sharsmith) Nesom
Orochaenactis thysanocarpha (Gray) Coville
  California mountainpincushion
Osmadenia tenella Nutt.
  false rosinweed
Osteospermum ecklonis (DC.) Norl.
  blue and white daisybush
Osteospermum sinuatum (DC.) Norl.
  glandular cape marigold
Palafoxia arida B.L. Turner & Morris
  desert palafox
Palafoxia arida var. arida B.L. Turner & Morris
  desert palafox
Palafoxia arida var. gigantea (M.E. Jones) B.L. Turner & Morris
  desert palafox
Pectis papposa Harvey & Gray
  cinchweed fetidmarigold
Pentachaeta alsinoides Greene
  tiny pygmydaisy
Pentachaeta aurea Nutt.
  golden chaetopappa
Pentachaeta bellidiflora Greene
  whiteray pygmydaisy
Pentachaeta exilis (Gray) Gray
  meager pygmydaisy
Pentachaeta exilis ssp. aeolica Van Horn & Ornduff
  meager pygmydaisy
Pentachaeta exilis ssp. exilis (Gray) Gray
  meager pygmydaisy
Pentachaeta fragilis Brandeg.
  fragile pygmydaisy
Pentachaeta lyonii Gray
  Lyon's pygmydaisy
Pericome caudata Gray
  mountain leaftail
Perityle emoryi Torr.
  Emory's rocklily
Perityle inyoensis (Ferris) A. Powell
  Inyo rockdaisy
Perityle megalocephala (S. Wats.) J.F. Macbr.
  limestone rockdaisy
Perityle megalocephala var. megalocephala (S. Wats.) J.F. Macbr.
  limestone rockdaisy
Perityle megalocephala var. oligophylla A. Powell
  limestone rockdaisy
Perityle villosa (Blake) Shinners
  Hanaupah laphamia
Petasites frigidus (L.) Fries
  Arctic sweet coltsfoot
Petasites frigidus var. palmatus (Ait.) Cronq.
  Arctic sweet coltsfoot
Petasites palmatus (Ait.) Gray
  = Petasites frigidus var. palmatus
Petradoria pumila (Nutt.) Greene
  grassy rockgoldenrod
Peucephyllum schottii Gray
  Schott's pygmycedar
Phalacroseris bolanderi Gray
  Bolander's mock dandelion
Phalacroseris bolanderi var. bolanderi Gray
  Bolander's mock dandelion
Phalacroseris bolanderi var. coronata Hall
  Bolander's mock dandelion
Picris echioides L.
  bristly oxtongue
Pleurocoronis pluriseta (Gray) King & H.E. Robins.
  bush arrowleaf
Pluchea camphorata (L.) DC.
  camphor pluchea
Pluchea odorata (L.) Cass.
  sweetscent
Pluchea odorata var. odorata (L.) Cass.
  sweetscent
Pluchea purpurascens (Sw.) DC.
  = Pluchea odorata var. odorata
Pluchea sericea (Nutt.) Coville
  arrowweed
Porophyllum gracile Benth.
  slender