Washington Flora Checklist
A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium

 

Checklist » Asteraceae
Asteraceae   (Aster Family)

Notes: Many taxonomic and nomenclatural changes have occurred within Asteraceae since the publication of Hitchcock and Cronquist (1973). The Flora of North America project(FNA) published the Asteraceae volumes in 2007, and that has served as the primary literature resource for the taxonomy and nomenclature provided here. Some of the introduced taxa in Washington belonging to this family are not included in the FNA volumes. Many of these can be found in Stace's New Flora of the British Isles (1997). Ken Chambers and Scott Sundberg provided a treatment of the Asteraceae for the Oregon Flora Project (OFP), and some of their taxonomic decisions are followed here rather than what is provided in FNA.

Family Synonyms:
» Compositae

Literature:
» Barkley, T. M. 1999. The segregates of Senecio, s.l., and Cacalia, s.l., in the Flora of North America north of Mexico. Sida 18: 661-672.

Family treatment authored by Peter F. Zika, David Giblin; last updated 12/5/2008 by David Giblin
 
Taxon (native species in boldface) # Synonyms Common Names
Achillea millefolium L.   [FNA19] 12 yarrow, milfoil
Achillea ptarmica L.   [FNA19] 0 pearl yarrow
Acroptilon repens (L.) DC.   [FNA19] 1 Russian knapweed, Turkestan thistle, hardheads
Adenocaulon bicolor Hook.   [FNA19] 0 trailplant, pathfinder
Ageratina occidentalis (Hook.) R.M. King & H. Rob.   [FNA21] 1 western snakeroot
Agoseris apargioides (Lessing) Greene var. maritima (E. Sheldon) G. I. Baird   [FNA20] 4 seaside agoseris
Agoseris aurantiaca (Hook.) Greene var. aurantiaca    [FNA19] 10 orange agoseris, slender agoseris
Agoseris aurantiaca (Hook.) Greene var. carnea (Rydb.) P. Lesica 1 pink agoseris
Agoseris elata (Nutt.) Greene   [FNA19] 0 tall agoseris, tall goat-chicory
Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & A. Gray) Jeps.   [FNA19] 2 pale goat-chicory
Agoseris glauca (Pursh) Raf. var. glauca    [FNA19, H&C] 6 pale agoseris, short beaked agoseris
Agoseris grandiflora (Nutt.) Greene var. grandiflora    [FNA19] 9 large flowered agoseris, large flower goat-chicory
Agoseris grandiflora (Nutt). Greene var. leptophylla G. I. Baird   [FNA19] 0 Puget Sound agoseris
Agoseris heterophylla (Nutt.) Greene   [FNA19, H&C] 7 annual agoseris
Agoseris monticola Greene   [FNA19] 1 Sierra Nevada agoseris
Agoseris retrorsa (Benth.) Greene   [FNA19] 2 spear leaved agoseris, spear leaf goat-chicory
Ambrosia acanthicarpa Hook.   [FNA21] 1 bur ragweed, annual bursage, flat spine bur-ragweed
Ambrosia artemisiifolia L.   [FNA21] 5 annual ragweed, common ragweed
Ambrosia chamissonis (Less.) Greene   [FNA21] 3 silver beachweed, beach bur, silver burr-ragweed
Ambrosia psilostachya DC.   [FNA21] 4 western ragweed, perennial ragweed
Ambrosia trifida L.   [FNA21] 4 giant ragweed
Anaphalis margaritacea (L.) Benth. & Hook. f. ex C. B. Clarke   [FNA19] 3 pearly everlasting
Anisocarpus madioides Nuttall   [FNA21] 1 tarweed
Antennaria alpina (L.) Gaertner   [FNA19] 2 alpine pussytoes
Antennaria anaphaloides Rydb.   [FNA19] 3 tall pussytoes
Antennaria corymbosa E. E. Nelson   [FNA19] 4 meadow pussytoes, flat topped pussytoes
Antennaria dimorpha (Nutt.) Torr. & A. Gray   [FNA19] 7 low pussytoes, cushion pussytoes
Antennaria flagellaris (A. Gray) A. Gray   [FNA19] 1 stoloniferous everlasting, flagellate pussytoes, whip pussytoes
Antennaria geyeri A. Gray   [FNA19] 0 pinewoods pussytoes, Geyer's pussytoes
Antennaria howellii Greene ssp. howellii    [FNA19] 3 Howell's pussytoes
Antennaria howellii Greene ssp. neodioica (Greene) R. J. Bayer   [FNA19] 2 field pussytoes
Antennaria howellii Greene ssp. petaloidea (Fernald) R. J. Bayer   [FNA19] 2 Blue Mountains everlasting
Antennaria lanata (Hook.) Greene   [FNA19, H&C] 1 woolly pussytoes, woolly everlasting
Antennaria luzuloides Torr. & A. Gray ssp. luzuloides    [FNA19] 2 woodrush pussytoes, silvery brown everlasting
Antennaria media Greene   [FNA19] 1 alpine pussytoes, Rocky Mountain pussytoes
Antennaria microphylla Rydb.   [FNA19] 5 small-leaf pussytoes
Antennaria parvifolia Nutt.   [FNA19] 0 little-leaf pussytoes
Antennaria pulcherrima (Hook.) Greene ssp. pulcherrima    [FNA19] 1 showy pussytoes
Antennaria racemosa Hook.   [FNA19, H&C] 0 raceme pussytoes, slender everlasting, Hooker's pussytoes
Antennaria rosea Greene ssp. arida (E.E. Nelson) Bayer   [FNA19] 0 desert pussytoes
Antennaria rosea Greene ssp. confinis (Greene) Bayer   [FNA19] 1
Antennaria rosea Greene ssp. pulvinata (Greene) Bayer   [FNA19] 0 pulvinate pussytoes
Antennaria rosea Greene ssp. rosea    [FNA19] 1 rosy pussytoes
Antennaria stenophylla (A. Gray) A. Gray   [FNA19] 2 narrowleaved pussytoes
Antennaria umbrinella Rydb.   [FNA19] 0 umber pussytoes, brown everlasting, brown-bract pussytoes
Anthemis arvensis L.   [FNA19] 1 corn chamomile, field chamomile
Anthemis cotula L.   [FNA19] 0 mayweed chamomile, dogfennel, stinking chamomile
Arctium lappa L.   [FNA19] 0 great burdock, greater burdock
Arctium minus (Hill) Bernh.   [FNA19] 0 common burdock, lesser burdock
Arnica chamissonis Less.   [FNA21] 7 meadow arnica, leafy leapordbane
Arnica cordifolia Hook.   [FNA21, H&C] 2 heart leaf arnica, hear-leaf leopardbane
Arnica discoidea Benth.   [FNA21] 4 rayless arnica, rayless leopardbane
Arnica fulgens Pursh   [FNA21] 0 hillside arnica, orange arnica, shining leopardbane
Arnica gracilis Rydb.   [FNA21] 1 slender arnica, slender leopardbane
Arnica lanceolata Nutt. ssp. prima (Maguire) Strother & S.J. Wolf   [FNA21] 5 clasping arnica
Arnica latifolia Bong.   [FNA21] 1 broad leaved arnica, mountain arnica, daffodil leopardbane
Arnica longifolia D.C. Eaton   [FNA21] 1 seep spring arnica, longleaf arnica, spear-leaf leopardbane
Arnica mollis Hook.   [FNA21] 0 hairy arnica, cordilleran arnica, cordilleran leopardbane
Arnica nevadensis A. Gray   [FNA21] 1 Sierra arnica, Nevada arnica, Sierran leopardbane
Arnica ovata Greene   [FNA21] 1 sticky leaf arnica
Arnica parryi A. Gray   [FNA21] 5 Parry's arnica
Arnica rydbergii Greene   [FNA21] 0 subalpine arnica, Rydberg's arnica, subalpine leopardbane
Arnica sororia Greene   [FNA21] 1 twin arnica, bunch arnica, twin leopardbane
Artemisia absinthium L.   [FNA19] 1 absinthe, wormwood, oldman
Artemisia annua L.   [H&C, FNA19] 0 annual wormwood, sweet Annie, sweet sagewort
Artemisia arbuscula Nutt. ssp. arbuscula    [FNA19] 1 low sagebrush, little sagebrush
Artemisia biennis Willd.   [FNA19, H&C] 1 biennial wormwood
Artemisia campestris L. var. caudata (Michx.) Palmer & Steyerm.   [H&C] 1 northern woomwood
Artemisia campestris L. var. purshii (Besser) Cronquist   [H&C] 1
Artemisia campestris L. var. scouleriana (Besser) Cronquist   [H&C] 4 Scouler's wormwood, Pacific sagewort
Artemisia campestris L. var. wormskioldii (Besser) Cronquist   [H&C] 1 Wormskiold’s wormwood or Columbia Islands sagewort
Artemisia cana Pursh   [FNA19] 0
Artemisia douglasiana Besser   [H&C, FNA19] 1 Douglas sagewort, Douglas mugwort, Douglas wormwood
Artemisia dracunculus L.   [H&C, FNA19] 2 tarragon, dragon sagewort, dragon wormwood
Artemisia frigida Willd.   [H&C, FNA19] 0 prairie sagebrush, prairie sagewort
Artemisia furcata M. Bieberstein   [FNA19] 3 forked wormwood, three-forked mugwort
Artemisia ludoviciana Nutt. ssp. candicans (Rydb.) D.D. Keck   [FNA19] 1 gray sagewort
Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D.D. Keck   [FNA19] 2 intermediate sagewort, mountain wormwood
Artemisia ludoviciana Nutt. ssp. ludoviciana    [FNA19] 3 Louisiana sagewort, silver wormwood, western mugwort
Artemisia michauxiana Besser   [FNA19] 1 Michaux's mugwort, lemon sagewort, Michaux's wormwood
Artemisia norvegica Fr. ssp. saxatilis (Besser) H. M. Hall & Clem.   [H&C, FNA19] 3 mountain sagewort
Artemisia rigida (Nutt.) A. Gray   [H&C, FNA19] 0 stiff sagebrush, scabland sagebrush
Artemisia spiciformis Osterhout   [FNA19] 1 snowfield sagebrush
Artemisia stelleriana Besser   [FNA19] 0 beach wormwood, dusty miller, oldwoman, Steller's wormwood
Artemisia suksdorfii Piper   [H&C, FNA19] 1 coastal mugwort, Suksdorf's sagewort, coastal wormwood
Artemisia tilesii Ledeb.   [FNA19] 6
Artemisia tridentata Nutt. ssp. tridentata    [FNA19] 1 big sagebrush
Artemisia tridentata Nutt. ssp. vaseyana (Rydb.) Beetle   [FNA19] 1 Vasey sagebrush, mountain big sagebrush
Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young    [FNA19] 2 Wyoming sagebrush
Artemisia tripartita Rydb. ssp. tripartita    [FNA19] 0 threetip sagebrush, cutleaf sagebrush
Artemisia vulgaris L.   [H&C, FNA19] 2 mugwort, lobed wormwood
Baccharis pilularis DC. ssp. consanguinea (de Candolle) C. B. Wolf   [FNA20] 1 chaparral broom
Balsamorhiza ×bonseri St. John (pro sp.) 0 hybrid balsamroot
Balsamorhiza careyana A. Gray   [FNA21] 0 Carey's balsamroot
Balsamorhiza careyana A. Gray × Balsamorhiza hookeri (Hook.) Nutt. 0 hybrid balsamroot
Balsamorhiza deltoidea Nutt.   [H&C, FNA21] 0 Puget balsamroot, deltoid balsamroot
Balsamorhiza hookeri Nutt.   [FNA21] 6 Hooker's balsamroot
Balsamorhiza hookeri (Hook.) Nutt. × Balsamorhiza sagittata (Pursh) Nutt. 0 hybrid balsamroot
Balsamorhiza incana Nutt.   [H&C, FNA21] 0 hoary balsamroot, woolly balsamroot
Balsamorhiza rosea A. Nelson & J.F. Macbr.   [H&C, FNA21] 0 rosy balsamroot
Balsamorhiza sagittata (Pursh) Nutt.   [H&C, FNA21] 0 arrowleaf balsamroot
Balsamorhiza serrata A. Nelson & J.F. Macbr.   [H&C, FNA21] 0 serrrate balsamroot, toothed balsamroot
Balsamorhiza ×terebinthacea (Hook.) Nutt. 0 wormwood balsamroot
Balsamorhiza ×tomentosa Rydb. 0 wooly hybrid balsamroot
Bellis perennis L.   [H&C, FNA20] 0 English daisy, lawn daisy
Bidens amplissima Greene   [FNA21, H&C] 2 Vancouver Island beggar ticks
Bidens beckii Torr. ex Spreng.   [FNA21] 4 water marigold, Beck's water marigold
Bidens cernua L.   [FNA21] 3 nodding beggar ticks, bur marigold
Bidens connata Muhl. ex Willd.   [FNA21] 0 swamp beggar ticks
Bidens frondosa L.   [FNA21] 0 leafy beggarticks, sticktight, devil's pitchfork
Bidens tripartita L.   [FNA21] 0 three lobed beggarticks
Bidens vulgata Greene   [FNA21] 0 tall beggarticks, western sticktight
Blepharipappus scaber Hook.   [FNA21] 2 blepharipappus, rough eyelashweed
Boltonia asteroides (L.) L’Héritier var. recognita (Fernald & Griscom) Cronquist   [FNA20] 4 white doll’s-daisy , asterlike boltonia
Brickellia grandiflora (Hook.) Nutt.   [FNA21] 1 large flowered tasselflower, large flowered thoroughwort, tasselflower brickellbush
Brickellia microphylla (Nutt.) A. Gray var. microphylla    [H&C, FNA21] 2 small leaved brickellia
Brickellia oblongifolia Nutt. var. oblongifolia    [H&C, FNA21] 0 narrowleaf brickellia
Cacaliopsis nardosmia (A. Gray) A. Gray   [FNA20] 3 silvercrown luina
Calendula officinalis L.   [FNA19] 0 pot marigold
Canadanthus modestus (Lindl.) G.L. Nesom   [FNA20] 6 few flowered aster, great northern aster
Carduus acanthoides L.   [H&C, FNA19] 0 plumeless thistle, spiny plumeless thistle
Carduus nutans L.   [H&C, FNA19] 0 musk or nodding thistle
Carduus tenuiflorus Curtis   [FNA 19] 1 slender flowered thistle, winged plumeless thistle
Carthamus tinctorius L.   [FNA19] 0 safflower
Centaurea benedicta (L.) L.   [FNA19] 1 blessed thistle
Centaurea calcitrapa L.   [H&C, FNA19] 0 purple starthistle, red starthistle
Centaurea cyanus L.   [H&C, FNA19] 0 bachelor's button, garden cornflower
Centaurea diffusa Lam.   [H&C, FNA19] 0 diffuse knapweed, tumble knapweed, white knapweed
Centaurea iberica Trev. ex Spreng.   [FNA19] 0 Iberian starthistle, Iberian knapweed
Centaurea jacea L.   [H&C, FNA19] 0 brown knapweed, brownray knapweed
Centaurea macrocephala Puschk. ex Willd.   [FNA19] 0 globe knapweed
Centaurea melitensis L.   [H&C, FNA19] 0 tocalote, Maltese starthistle
Centaurea ×moncktonii C.E. Britton   [FNA19] 3 meadow or protean knapweed
Centaurea montana L.   [FNA19, H&C] 0 montane starthistle, mountain bluet, mountain cornflower
Centaurea nigra L.   [FNA19] 0 black knapweed, hardheads, lesser knapweed
Centaurea nigrescens Willd.   [FNA19] 5 short fringed knapweed, Tyrol knapweed
Centaurea ×psammogena G. Gayer   [FNA19] 0
Centaurea solstitialis L.   [H&C, FNA19] 0 yellow starthistle, St. Barnaby's thistle
Centaurea stoebe L. ssp. micranthos (Gugler) Hayek   [FNA19] 2 spotted knapweed
Centaurea trichocephala Bieb. ex Willd.   [FNA19] 0 featherhead knapweed
Centromadia pungens (Hooker & Arnott) Greene ssp. pungens    [FNA21] 2 common spikeweed
Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii    [H&C, FNA19] 7 dustymaidens, hoary false yarrow
Chaenactis thompsonii Cronquist   [H&C, FNA19] 0 Thompson's pincushion
Chondrilla juncea L.   [FNA19, H&C] 0 gum succory, rush skeletonweed, hogbite
Chrysothamnus humilis Greene   [FNA20] 3 Truckee rabbitbrush
Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. lanceolatus (Nutt.) H.M. Hall & Clem.   [FNA20] 2 yellow or sticky-leaf rabbitbrush
Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus    [FNA20] 8 yellow or sticky-leaf rabbitbrush
Cichorium intybus L.   [H&C, FNA19] 0 chicory, wild succory
Cirsium arvense (L.) Scopoli   [FNA19] 3 Canadian thistle
Cirsium brevifolium Nutt.   [H&C, FNA19] 1 Palouse thistle
Cirsium brevistylum Cronquist   [H&C, FNA19] 0 short styled thistle, clustered thistle
Cirsium edule Nutt. var. edule    [FNA19] 1 Indian thistle, edible thistle
Cirsium edule Nutt. var. macounii (Greene) D.J. Keil   [FNA19] 2 Macoun's thistle
Cirsium edule Nutt. var. wenatchense D.J. Keil   [FNA19] 0 Wenatchee thistle
Cirsium flodmanii (Rydb.) Arthur   [H&C, FNA19] 0 Flodman's thistle
Cirsium foliosum (Hook.) DC.   [H&C, FNA19] 1 leafy thistle
Cirsium hookerianum Nutt.   [H&C, FNA19] 0 Hooker's thistle, white thistle
Cirsium inamoenum (Greene) D. J. Keil var. inamoenum    [FNA19] 1 Greene’s thistle
Cirsium remotifolium (Hook.) DC. var. remotifolium    [FNA19] 3 remote-leaved or fewleaf thistle
Cirsium scariosum Nutt.   [H&C, FNA19] 3 elk thistle, meadow thistle
Cirsium undulatum (Nutt.) Spreng.   [H&C, FNA19] 1 wavy leaf thistle
Cirsium vulgare (Savi) Ten.   [H&C, FNA19] 1 bull thistle, common thistle
Columbiadoria hallii (A. Gray) G.L. Nesom   [FNA20] 1 Hall's goldenweed, Columbia River daisy
Conyza bonariensis (L.) Cronquist   [FNA20] 2 South American conyza
Conyza canadensis (L.) Cronquist   [FNA20] 2 Canadian fleabane, horseweed
Coreopsis lanceolata L.   [FNA21] 0 lance-leaved tickseed
Coreopsis tinctoria Nutt.   [FNA21] 3 golden tickseed
Cota austriaca (Jacq.) Schultz-Bipontinus    [FNA19] 1
Cota tinctoria (L.) J. Gay ex Gussone   [FNA19] 1 Golden marguerite, yellow chamomile
Cota triumfetti (All.) J. Gay   [Draft Revised H&C] 0
Cotula coronopifolia L.   [FNA19, H&C] 0 brass buttons, common brass buttons
Crepis acuminata Nutt.   [FNA19] 1 long leaved hawksbeard, tapertip hawksbeard
Crepis atribarba A. Heller   [FNA19, H&C] 1 slender hawksbeard
Crepis bakeri Greene ssp. bakeri    [FNA19, H&C] 0 Baker's hawksbeard
Crepis barbigera Leiberg ex Coville   [H&C, FNA19] 1 bearded hawksbeard
Crepis capillaris (L.) Wallr.   [FNA19, H&C] 1 smooth hawksbeard
Crepis intermedia A. Gray   [H&C, FNA19] 0 gray hawksbeard intermediate hawksbeard, limestone hawksbeard
Crepis modocensis Greene ssp. glareosa (Piper) Babc. & Stebbins   [FNA19] 0
Crepis modocensis Greene ssp. modocensis    [FNA19, H&C] 0 low hawksbeard, Modoc hawksbeard
Crepis modocensis Greene ssp. rostrata (Coville) Babc. & Stebbins   [FNA19] 1
Crepis nana Richardson   [FNA19, H&C] 4 low hawksbeard
Crepis nicaeensis Balb. ex Pers.   [FNA19, H&C] 0 French hawksbeard, Turkish hawksbeard
Crepis occidentalis Nutt.   [JPM] 5 western hawksbeard
Crepis pleurocarpa A. Gray   [FNA19] 1 naked stemmed hawksbeard
Crepis runcinata (E. James) Torr. & A. Gray ssp. hispidulosa (Howell ex Rydb.) Babc. & Stebbins   [FNA19] 1 meadow hawksbeard
Crepis runcinata (James) Torr. & A. Gray ssp. runcinata    [FNA19, H&C] 0 dandelion hawksbeard
Crepis setosa Haller f.   [FNA19, H&C] 0 rough hawksbeard, bristly hawksbeard
Crepis tectorum L.   [FNA19, H&C] 0 annual hawksbeard, rooftop hawksbeard, narrow leaf hawksbeard
Crocidium multicaule Hook.   [FNA19, H&C] 0 spring gold, gold star
Crupina vulgaris Cass.   [FNA19, H&C] 0 crupina, bearded creeper
Cyclachaena xanthiifolia (Nuttall) Fresenius   [FNA21] 2 tall marsh elder, burweed marsh elder, carelessweed
Dieteria canescens (Pursh) Nuttall var. incana (Lindley) D. R. Morgan & R. L. Hartman,   [FNA20] 6 hoary-aster
Doronicum pardalianches L.   [FNA22] 0 great leopard’s-bane
Eatonella nivea (D.C. Eaton) A. Gray   [FNA21] 1 white eatonella, white false tickhead
Echinops exaltatus Schrad.   [FNA19] 0 tall globe thistle
Echinops sphaerocephalus L.   [FNA19] 0 great globe thistle
Erechtites glomerata (Desf. ex Poir.) DC.   [FNA20] 1 New Zealand burnweed, Australian fireweed, cut leaf burnweed
Erechtites hieraciifolius (L.) Raf. ex DC. var. hieraciifolius    [FNA20] 0 American burnweed
Ericameria bloomeri (A. Gray) J.F. Macbr.   [FNA20] 4 rabbitbrush goldenweed, rabbitbush heath goldenrod
Ericameria greenei (A. Gray) G.L. Nesom   [FNA20] 4 Greene's goldenweed, Greene's heath goldenrod
Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & G.I. Baird var. nana (Cronquist) G.L. Nesom & G.I. Baird   [FNA20] 3 little rabbitbrush
Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & G.I. Baird var. speciosa (Nutt.) G.L. Nesom & G.I. Baird   [FNA20] 5 rubber rabbitbrush
Ericameria resinosa Nutt.   [FNA20] 1 Columbia goldenweed, Columbian heath goldenrod
Erigeron acris L. var. asteroides (Andrz. ex Besser) DC.   [H&C] 2 bitter fleabane
Erigeron aliceae Howell   [FNA20, H&C] 0 Eastwood's daisy, Alice's fleabane
Erigeron annuus (L.) Pers.   [FNA20, H&C] 2 annual fleabane, sweet scabrous erigeron, eastern daisy fleabane
Erigeron aureus Greene   [FNA20, H&C] 2 golden fleabane, golden daisy
Erigeron basalticus Hoover   [FNA20, H&C] 0 basalt fleabane
Erigeron bloomeri A. Gray var. bloomeri    [FNA20, H&C] 0 scabland fleabane, bloomer's daisy
Erigeron caespitosus Nutt.   [FNA20, H&C] 0 tufted fleabane, tufted daisy
Erigeron chrysopsidis A. Gray var. chrysopsidis    [FNA20] 1 dwarf yellow fleabane
Erigeron compositus Purs   [FNA20] 4 dwarf mountain fleabane
Erigeron corymbosus Nutt.   [FNA20, H&C] 0 foothill daisy, longleaf fleabane
Erigeron davisii (Cronquist) G. L. Nesom   [Draft Revised H&C; FNA] 1 Davis's daisy; Davis's fleabane
Erigeron disparipilus Cronquist   [FNA20, H&C] 0 Snake River daisy, white cushion fleabane
Erigeron divergens Torr. & A. Gray   [FNA20, H&C] 0 diffuse daisy, spreading fleabane
Erigeron eatonii A. Gray var. villosus (Cronquist) Cronquist   [FNA20, H&C] 1 Eaton's shaggy fleabane, Eaton's shaggy daisy
Erigeron elatus (Hook.) Greene   [FNA20] 3 swamp fleabane
Erigeron filifolius (Hook.) Nutt.   [FNA20] 1 threadleaf fleabane
Erigeron flettii G.N. Jones   [FNA20, H&C] 0 Olympic Mt. fleabane, Flett's fleabane
Erigeron glacialis (Nuttall) A. Nelson var. glacialis    [FNA20] 9
Erigeron grandiflorus Hook.   [Draft Revised H&C; FNA] 1 large-flowered fleabane
Erigeron howellii A. Gray   [FNA20, H&C] 1 Howell's daisy, Howell's fleabane
Erigeron inornatus (A. Gray) A. Gray var. inornatus    [FNA20, H&C] 0 California rayless daisy, unadorned fleabane
Erigeron leibergii Piper   [FNA20, H&C] 0 Leiberg's fleabane
Erigeron linearis (Hook.) Piper   [FNA20] 2 desert yellow daisy, lineleaf fleabane
Erigeron lonchophyllus Hook.   [FNA20, H&C] 2 spear leaved fleabane, short rayed daisy
Erigeron nivalis Nutt.   [FNA20] 3
Erigeron oreganus A. Gray   [FNA20, H&C] 0 gorge daisy, Oregon fleabane
Erigeron peregrinus (Banks ex Pursh) Greene, var. thompsonii (S. F. Blake ex J. W. Thompson) Cronquist   [FNA20] 3
Erigeron philadelphicus L. var. philadelphicus    [FNA20, H&C] 1 Philadelphia fleabane, Philadelphia daisy
Erigeron piperianus Cronquist   [FNA20, H&C] 0 Piper's fleabane
Erigeron poliospermus A. Gray var. cereus Cronquist   [FNA20, H&C] 0 Kittitas fleabane
Erigeron poliospermus A. Gray var. poliospermus    [FNA20, H&C] 0 cushion fleabane, hairy seeded daisy
Erigeron pumilus Nutt. var. intermedius Cronquist   [FNA20] 5 shaggy fleabane
Erigeron pumilus Nutt. var. pumilus    [FNA20] 1
Erigeron salishii G.W. Douglas & Packer   [FNA20] 0 Salish daisy, star peak fleabane
Erigeron speciosus (Lindl.) DC.   [FNA20] 3 showy fleabane
Erigeron strigosus Muhl. ex Willd. var. septentrionalis (Fernald & Wiegand) Fernald   [FNA20, H&C] 1 prairie fleabane
Erigeron strigosus Muhl. ex Willd. var. strigosus    [FNA20, H&C] 1 daisy fleabane, branching daisy
Erigeron subtrinervis Rydberg ex Porter & Britton   [FNA20] 2
Eriophyllum lanatum (Pursh) J. Forbes var. achillaeoides (DC.) Jeps.   [FNA21, H&C] 0 yarrow leaved eriophyllum
Eriophyllum lanatum (Pursh) J. Forbes var. integrifolium (Hook.) Smiley   [FNA21, H&C] 0 Oregon sunshine
Eriophyllum lanatum (Pursh) J. Forbes var. lanatum    [FNA21, H&C] 0 common eriophyllum, common wooly sunflower
Eriophyllum lanatum (Pursh) J. Forbes var. leucophyllum (DC.) W.R. Carter   [FNA] 0
Eucephalus engelmannii (D.C. Eaton) Greene   [FNA20] 1 Engelmann's aster
Eucephalus glaucescens (A. Gray) Greene   [FNA20] 2 Klickitat aster
Eucephalus ledophyllus (A. Gray) Greene var. ledophyllus    [FNA20] 2 Cascade aster
Eucephalus paucicapitatus (B.L. Rob.) Greene   [FNA20] 1 Olympic Mountain aster
Eurybia conspicua (Lindl.) G.L. Nesom   [FNA20] 1 western showy aster
Eurybia integrifolia (Nutt.) G.L. Nesom   [FNA20] 2 thick stemmed aster
Eurybia merita (A. Nelson) G.L. Nesom   [FNA20] 3 subalpine aster
Eurybia radulina (A. Gray) G.L. Nesom   [FNA20] 1 rough leaved aster
Eurybia sibirica (L.) G.L. Nesom   [FNA20] 1 Arctic aster, Siberian aster, Behring wood aster
Euthamia graminifolia (L.) Greene   [FNA20] 2 fragrant goldenrod, grass leaved goldenrod
Euthamia occidentalis Nutt.   [FNA20] 3 western goldenrod, western goldentop
Eutrochium maculatum (L.) E. E. Lamont var. bruneri (A. Gray) E. E. Lamont   [FNA21] 4 joepyeweed
Filago vulgaris Lamarck   [FNA19] 1 German filago
Gaillardia aristata Pursh   [H&C, FNA19] 0 blanket flower, great flowered gaillardia
Gaillardia ×grandiflora Van Houtte   [FNA21] 0 blanketflower
Galinsoga parviflora Cav. var. parviflora    [FNA21] 1 small flowered galinsoga, gallant soldier
Galinsoga quadriradiata Ruiz & Pav.   [FNA21] 1 quickweed, shaggy galinsoga, ciliate galinsoga, shaggy soldier
Gamochaeta ustulata (Nuttall) Holub   [FNA19] 4 purple cudweed, spoon-leaf cudweed
Gnaphalium palustre Nutt.   [FNA19, H&C] 3 lowland cudweed, western marsh cudweed
Gnaphalium uliginosum L.   [FNA19, H&C] 0 marsh cudweed
Grindelia hirsutula Hooker & Arnott   [FNA] 12 gumweed
Grindelia integrifolia DC.   [FNA20, H&C] 1 Puget Sound gumweed, Willamette Valley gumweed, Puget Sound gumplant
Grindelia squarrosa (Pursh) Dunal   [FNA20, H&C] 2
Guizotia abyssinica (L. f.) Cass.   [FNA21] 1
Gutierrezia sarothrae (Pursh) Britton & Rusby   [FNA20, H&C] 0 broom snakeweed, matchweed, kindlingweed
Helenium autumnale L.   [FNA20, H&C] 3 large flowered sneezeweed, common sneezeweed
Helianthella uniflora (Nutt.) Torr. & A. Gray var. douglasii (Torr. & A. Gray) W.A. Weber   [FNA20, H&C] 0 Douglas helianthella, false sunflower
Helianthus annuus L.   [FNA21, H&C] 1 common sunflower
Helianthus cusickii A. Gray   [FNA21, H&C] 0 Cusick's sunflower, turniproot sunflower
Helianthus grosseserratus Martens   [FNA21, H&C] 0 sawtooth sunflower
Helianthus maximiliani Schrad.   [FNA21, H&C] 0 narrow leaved sunflower
Helianthus nuttallii Torr. & A. Gray ssp. nuttallii    [FNA21] 1 Nuttall's sunflower, cordilleran sunflower
Helianthus petiolaris Nutt.   [FNA21, H&C] 2 prairie sunflower
Helianthus tuberosus L.   [FNA21, H&C] 0 Jerusalem artichoke
Hemizonella minima (A. Gray) A. Gray   [FNA21] 2 small-head tarweed
Heterotheca barbata (Rydb.) Semple   [FNA20] 1 Spokane goldenaster
Heterotheca oregona (Nutt.) Shin.   [OFP] 5 Oregon goldenaster
Heterotheca villosa (Pursh) Shinners var. foliosa (Nutt.) V.L. Harms   [FNA20] 1 leafy goldenaster
Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple   [FNA20] 3 hairy goldenaster
Heterotheca villosa (Pursh) Shinners var. villosa    [FNA20] 1 hairy goldaster, hairy goldenaster
Hieracium albiflorum Hook.   [FNA19, H&C] 1 white hawkweed, white flowered hawkweed
Hieracium aurantiacum L.   [FNA19, H&C] 0 orange hawkweed, king devil, devil's paintbrush
Hieracium caespitosum Dumort.   [FNA19] 1 yellow king devil, meadow hawkweed
Hieracium ×flagellare Willd.   [not in H&C] 4 whip hawkweed
Hieracium ×floribundum Wimm. & Grab. 0 flowery hawkweed
Hieracium lachenalii C. C. Gmel.   [FNA19] 2 English hawkweed, European hawkweed, common hawkweed
Hieracium longiberbe Howell   [FNA19] 0 long bearded hawkweed
Hieracium maculatum Sm.   [Stace] 0 mottled hawkweed
Hieracium murorum L.   [not in H&C] 1 wall hawkweed
Hieracium pilosella L.   [H&C] 3 mouse ear hawkweed
Hieracium piloselloides Vill.   [FNA19] 1 tall hawkweed
Hieracium sabaudum L.   [FNA19] 1 savoy hawkweed
Hieracium scouleri Hook.   [FNA19] 7 Scouler's hawkweed, woolly weed, hound tongue hawkweed
Hieracium ×stoloniflorum Waldst. & Kit.   [not in H&C] 0 forked hawkweed
Hieracium triste Willd.   [FNA19] 5 slender hawkweed
Hieracium umbellatum L.   [FNA19] 2 narrowleaf hawkweed, umbellate hawkweed
Hieracium vulgatum Fr.   [FNA19, H&C] 0 common hawkweed
Hulsea nana A. Gray   [FNA21, H&C] 1 dwarf alpinegold, dwarf hulsea
Hymenopappus filifolius Hook. var. filifolius    [FNA19, H&C] 0 Columbia cutleaf
Hypochaeris glabra L.   [FNA19, H&C] 0 smooth cat's ear, false dandelion
Hypochaeris radicata L.   [FNA19, H&C] 0 rough cat's ear, hairy cat's ear
Inula helenium L.   [FNA19, H&C] 0 elecampane, inula
Ionactis stenomeres (A. Gray) Greene   [FNA20] 1 Rocky Mountain ankle-aster
Iva axillaris Pursh   [FNA21, H&C] 1 poverty weed, deeproot, deer root
Jaumea carnosa (Less.) A. Gray   [FNA21, H&C] 1 fleshy jaumea, marsh jaumea
Lactuca biennis (Moench) Fernald   [FNA19, H&C] 1 tall blue lettuce, wild blue lettuce
Lactuca canadensis L.   [FNA19, H&C] 0 Canadian wild lettuce, Florida blue lettuce
Lactuca ludoviciana (Nutt.) DC.   [FNA19] 0 western lettuce, prairie lettuce, Louisiana lettuce
Lactuca saligna L.   [FNA19, H&C] 0 willow lettuce, least lettuce
Lactuca sativa L.   [FNA19] 0 garden lettuce
Lactuca serriola L.   [FNA19, H&C] 2 prickly lettuce
Lactuca virosa L.   [FNA19] 0 wild lettuce, great lettuce, tall lettuce
Lagophylla ramosissima Nutt.   [FNA21] 1 slender hareleaf, common rabbitleaf
Lapsana communis L.   [FNA19, H&C] 0 nipplewort, common nipplewort
Lasthenia glaberrima DC.   [FNA21, H&C] 0 smooth goldfields, smooth lasthenia
Lasthenia maritima (A. Gray) M.C. Vasey   [H&C, FNA21] 3 seaside goldfields, maritime goldfields
Lasthenia minor (DC.) Ornduff   [FNA21] 1 coastal goldfields
Layia glandulosa (Hook.) Hook. & Arn.   [FNA21, H&C] 2 white daisy tidytips, white layia
Leontodon autumnalis L.   [FNA19] 1 autumn hawkbit
Leontodon hirtus L.   [FNA19] 0 rough hawkbit
Leontodon saxatilis Lam. ssp. saxatilis    [FNA19] 5 lesser hawkbit
Leucanthemum maximum (Ramond) DC.   [FNA19] 1 Shasta daisy
Leucanthemum ×superbum (Bergmans ex J.W. Ingram) D.H. Kent   [FNA19] 0 Shasta daisy
Leucanthemum vulgare Lam.   [FNA19] 2 oxeye daisy
Logfia arvensis (L.) Holub   [FNA19] 2 field filago, field cottonrose
Logfia minima (Sm.) Dumort.   [FNA19] 1 little cottonrose
Luina hypoleuca Benth.   [FNA20, H&C] 0 silverback luina, littleleaf luina, littleleaf silverback
Lygodesmia juncea (Pursh) D. Don ex Hook.   [FNA19, H&C] 0 rush skeletonplant
Madia citriodora Greene   [FNA21, H&C] 0 lemon scented tarweed, lemon tarweed, lemon scented tarplant
Madia elegans D. Don ex Lindl.   [FNA21, H&C] 5 autumn showy tarweed, common madia
Madia exigua (Sm.) A. Gray   [FNA21, H&C] 0 little tarweed, threadstem madia, little tarplant
Madia glomerata Hook.   [FNA21, H&C] 0 cluster tarweed, mountain tarweed, mountain tarplant
Madia gracilis (Sm.) D.D. Keck & J. Clausen ex Applegate   [FNA21, H&C] 1 slender tarweed, common tarweed, grassy tarplant
Madia sativa Molina   [FNA21, H&C] 5 coast tarweed, Chilean tarplant
Matricaria chamomilla L.   [FNA19, H&C] 1 wild chamomile
Matricaria discoidea DC.   [FNA19] 4 pineapple weed
Microseris bigelovii (Gray) Sch. Bip.   [FNA19, H&C] 0 coast microseris, coastal silverpuffs
Microseris borealis (Bong.) Sch. Bip.   [FNA19, H&C] 3 apargidium, bog microseris, northern silverpuffs
Microseris laciniata (Hook.) Sch. Bip. ssp. laciniata    [FNA19, H&C] 3 cutleaf microseris, cut leaved scorzonella
Microseris laciniata (Hooker) Schultz-Bipontinus ssp. leptosepala (Nuttall) K. L. Chambers   [FNA19] 1 cutleaf or cut-leaved silverpuffs
Microseris nutans (Hook.) Sch. Bip.   [FNA19, H&C] 3 nodding microseris, nodding scorzonella, nodding silverpuffs
Mulgedium pulchellum (Pursh) G. Don    [FNA19] 3
Mycelis muralis (L.) Dumort.   [FNA19] 1
Nestotus stenophyllus (A. Gray) Urbatsch, R. P. Roberts & Neubig   [FNA20] 2
Nothocalais alpestris (A. Gray) K.L. Chambers   [FNA19] 3 alpine lake agoseris
Nothocalais troximoides (A. Gray) Greene   [FNA19] 2 false agoseris, weevil prairie dandelion
Onopordum acanthium L.   [FNA19, H&C] 0 Scots thistle, Scotch thistle, cotton thistle
Oreostemma alpigenum (Torr. & A. Gray) G.L. Nesom var. alpigenum    [FNA20] 2 tundra mountaincrown
Packera bolanderi (A. Gray) W.A. Weber & A. Löve var. bolanderi    [FNA20] 1 Bolander’s ragwort
Packera bolanderi (Gray) W.A. Weber & A. Löve var. harfordii (Greenm.) D.K. Trock & T. M. Barkley   [FNA20] 3 Harford's ragwort
Packera cana (Hook.) W.A. Weber & A. Löve   [FNA] 4
Packera cymbalaria (Pursh) W.A. Weber & A. Löve   [FNA20] 2 dwarf arctic ragwort
Packera flettii (Wiegand) W.A. Weber & A. Löve   [FNA20] 1 Flett's groundsel
Packera indecora (Greene) A.& D. Löve   [FNA20] 1 elegant groundsel
Packera macounii (Greene) W.A. Weber & A. Löve   [FNA20] 1 Siskiyou Mountain ragwort
Packera pauciflora (Pursh) A.& D. Löve   [FNA20] 1
Packera paupercula (Michx.) A.& D. Löve   [FNA20] 2 balsam groundsel
Packera porteri (Greene) C. Jeffrey   [FNA20] 1 Porter's groundsel
Packera pseudaurea (Rydb.) W.A. Weber & A. Löve var. pseudaurea    [FNA20] 2
Packera streptanthifolia (Greene) W.A. Weber & A. Löve   [FNA20] 6 Rocky Mountain groundsel, Rocky Mountain butterweed, cleftleaf groundsel
Packera subnuda (DC) Trock & T. M. Barkley var. subnuda    [FNA20] 6 cleftleaf groundsel
Petasites frigidus (L.) Fr. var. frigidus    [FNA20, H&C] 1 sweet coltsfoot, alpine or arctic butterbur
Petasites frigidus (L.) Fr. var. palmatus (Aiton) Cronquist   [FNA20, H&C] 7 western coltsfoot
Petasites frigidus (L.) Fr. var. sagittatus (Banks ex Pursh) Cherniawsky   [FNA20] 1 arrowleaf or arrowhead sweet coltsfoot
Petasites japonicus (Siebold & Zucc.) Maxim. var. giganteus (F. Schmidt ex Trautv.) G. Nicholson   [not in H&C] 1 Japanese sweet coltsfoot
Petasites japonicus (Siebold & Zucc.) Maxim. var. japonicus    [not in H&C] 2 Japanese sweet coltsfoot
Petasites ×vitifolius Greene   [FNA20, H&C] 4 hybrid or Wenatchee coltsfoot
Picris hieracioides L.   [FNA19] 1
Pleicanthus spinosus (Nutt.) Rydb.   [Draft Revised H&C; FNA 19] 1 thorny skeletonweed
Prenanthes alata (Hook.) D. Dietr.   [FNA19, H&C] 1 western rattlesnake root
Pseudognaphalium californicum (DC.) A. Anderb.   [FNA19] 1 ladies tobacco
Pseudognaphalium luteoalbum (L.) Hilliard & B.L. Burtt   [FNA19] 1 red-tip rabbit-tobacco
Pseudognaphalium macounii (Greene) Kartesz   [FNA19] 1 Macoun’s rabbit-tobacco,
Pseudognaphalium stramineum (Kunth) W.A. Weber   [FNA19] 2 cotton batting cudweed, cotton batting plant
Pseudognaphalium thermale (E. E. Nelson) G. L. Nesom   [FNA19] 5 northwestern rabbit-tobacco
Psilocarphus brevissimus Nutt. var. brevissimus    [FNA19, H&C] 1 dwarf woollyheads
Psilocarphus elatior (A. Gray) A. Gray   [FNA19, H&C] 1 tall woollyheads
Psilocarphus oregonus Nutt.   [FNA19, H&C] 0 Oregon woollyheads
Psilocarphus tenellus Nutt.   [FNA19, H&C] 0 slender woollyheads
Pyrrocoma carthamoides Hook. var. carthamoides    [FNA20] 3 Columbia goldenweed, rayless goldenweed
Pyrrocoma carthamoides Hook. var. cusickii (A. Gray) Kartesz & Gandhi   [FNA20] 2 narrowhead goldenweed
Pyrrocoma hirta (A. Gray) Greene var. sonchifolia (Greene) Kartesz & Gandhi   [FNA20] 2 large sticky goldenweed
Pyrrocoma liatriformis Greene   [FNA20] 4 Palouse goldenweed
Pyrrocoma scaberula Greene   [Bjork and Darrach; JBRIT, 3:231–238.] 0
Rainiera stricta (Greene) Greene   [FNA20] 1 Rainiera, tongue leaved luina, false silverback
Ratibida columnifera (Nutt.) Woot. & Standl.   [FNA21, H&C] 2 prairie coneflower
Rigiopappus leptocladus A. Gray   [FNA20, H&C] 0 bristlehead, false wireweed
Rudbeckia alpicola Piper   [FNA21] 1 Washington, Wenatchee Mountain, or showy coneflower
Rudbeckia hirta L. var. pulcherrima Farw.   [FNA21, H&C] 0 blackeyed Susan
Rudbeckia laciniata L. var. ampla (A. Nelson) Cronquist   [FNA21, H&C] 2 tall coneflower
Rudbeckia occidentalis Nutt.   [FNA21, H&C] 2 western coneflower, western chocolate come
Saussurea americana D.C. Eaton   [FNA19, H&C] 0 American sawwort
Senecio elmeri Piper   [FNA20, H&C] 0 Elmer's ragwort
Senecio fremontii Torr. & A. Gray var. fremontii    [FNA20, H&C] 1 dwarf mountain groundsel
Senecio hydrophiloides Rydb.   [FNA20, H&C] 3 sweet marsh butterweed, stout meadow groundsel
Senecio hydrophilus Nutt.   [FNA20, H&C] 1 alkali marsh butterweed, water groundsel, alkali marsh ragwort
Senecio integerrimus Nutt. var. exaltatus (Nutt.) Cronquist   [FNA20, H&C] 2 tall western groundsel, lambstongue groundsel
Senecio integerrimus Nutt. var. ochroleucus (A. Gray) Cronquist   [FNA20, H&C] 1 white western groundsel
Senecio jacobaea L.   [FNA20, H&C] 0 tansy ragwort
Senecio lugens Richards.   [FNA20, H&C] 1 black-tipped groundsel
Senecio minimus Poir.   [Jepson 2nd] 2 Australian bornweed, toothed coast burnweed
Senecio neowebsteri Blake   [FNA20, H&C] 0 Olympic Mountain ragwort
Senecio serra Hook. var. serra    [FNA20, H&C] 5 butterweed groundsel, tall butterweed
Senecio sylvaticus L.   [FNA20, H&C] 0 woodland groundsel, wood groundsel, woodland ragwort
Senecio triangularis Hook.   [FNA20, H&C] 1 arrowleaf groundsel, arrowleaf ragwort
Senecio viscosus L.   [Draft Revised H&C; FNA20] 0 sticky ragwort
Senecio vulgaris L.   [FNA20, H&C] 0 old man in the spring, common groundsel
Sericocarpus oregonensis Nutt. ssp. oregonensis    [FNA20] 4 Oregon white topped aster
Sericocarpus rigidus Lindl.   [FNA20] 1 white-topped aster, Columbian white-topped aster
Silybum marianum (L.) Gaertn.   [FNA19, H&C] 0 milk thistle
Solidago elongata Nutt.   [FNA20] 3 West Coast or Cascade Canada goldenrod
Solidago lepida DC. var. lepida    [FNA20] 1 western Canada goldenrod
Solidago lepida DC. var. salebrosa (Piper) Semple   [FNA20] 6 Rocky Mountains Canada goldenrod
Solidago missouriensis Nutt.   [FNA20, H&C] 4 Missouri goldenrod
Solidago multiradiata Aiton   [FNA20, H&C] 2 northern goldenrod, Rocky Mountain goldenrod
Solidago simplex Kunth var. nana (A. Gray) G.S. Ringius   [FNA20] 2 dwarf goldenrod
Solidago simplex Kunth var. simplex    [FNA20] 4 sticky goldenrod
Soliva sessilis Ruiz & Pav.   [FNA19] 1 prickly soliva, common soliva, lawn burrweed
Sonchus arvensis L. ssp. arvensis    [FNA19] 1 field sow-thistle
Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman   [FNA19] 2 field sow-thistle
Sonchus asper (L.) Hill   [FNA19, H&C] 2 prickly sow thistle, spiny leaf sow thistle
Sonchus oleraceus L.   [FNA19, H&C] 0 common sow thistle
Stenotus lanuginosus (A. Gray) Greene var. lanuginosus    [FNA19] 2 woolly goldenweed, woolly stenotus
Stephanomeria exigua Nutt. ssp. exigua    [FNA19] 0 small wirelettuce, skeletonplant
Stephanomeria paniculata Nutt.   [FNA19] 0 stiff branched wirelettuce, stiff branched stephanomeria
Stephanomeria tenuifolia (Raf.) H.M. Hall   [FNA19] 3 narrowleaf stephanomeria, wire lettuce
Symphyotrichum ×amethystinum (Nutt.) G.L. Nesom   [FNA20] 1 amethyst aster
Symphyotrichum ascendens (Lindl.) G.L. Nesom   [FNA20] 3 long-leaved aster, intermountain aster, western aster
Symphyotrichum boreale (Torr. & A. Gray) A.& D. Löve   [FNA] 3 rush aster, slender white aster, northern bog aster
Symphyotrichum bracteolatum (Nutt.) G.L. Nesom   [Jepson 2nd] 2 bracted aster, Oregon aster, Eaton's aster
Symphyotrichum campestre (Nutt.) G.L. Nesom   [FNA20] 5 Western meadow aster
Symphyotrichum chilense (Nees) G.L. Nesom var. chilense    [FNA20] 3 common California or Pacific aster
Symphyotrichum ciliatum (Ledeb.) G.L. Nesom   [FNA20] 1 rayless annual or rayless alkali aster
Symphyotrichum ×columbianum (Piper) G.L. Nesom   [FNA20] 1
Symphyotrichum cusickii (Gray) G.L. Nesom   [FNA20] 2 Cusick's aster, Cusick's American aster
Symphyotrichum ericoides (L.) G.L. Nesom var. pansum (S. F. Blake) G.L. Nesom   [FNA20] 3 white heath aster
Symphyotrichum falcatum (Lindl.) G.L. Nesom var. commutatum (T.&G.) G.L. Nesom   [FNA20] 2 western heath or white prairie aster
Symphyotrichum foliaceum (DC.) G.L. Nesom var. apricum (A. Gray) G.L. Nesom   [FNA20] 1 leafy or leafy-bracted or alpine leafybract aster
Symphyotrichum foliaceum (DC.) G.L. Nesom var. canbyi (A. Gray) G.L. Nesom   [FNA20] 1 Canby's leafybract aster
Symphyotrichum foliaceum (DC.) G.L. Nesom var. foliaceum    [FNA20] 1 leafy or leafy-bracted or alpine leafybract aster
Symphyotrichum foliaceum (DC.) G.L. Nesom var. parryi (D.C. Eaton) G.L. Nesom   [FNA20] 2 leafy or leafy-bracted or alpine leafybract aster
Symphyotrichum frondosum (Nutt.) G.L. Nesom   [FNA20] 2 short-rayed alkali aster
Symphyotrichum hallii (A. Gray) G.L. Nesom   [FNA20] 2 Hall's aster
Symphyotrichum hendersonii (Fernald) G.L. Nesom   [FNA20] 2 Henderson’s aster
Symphyotrichum jessicae (Piper) G.L. Nesom   [FNA20] 1 Jessica’s aster
Symphyotrichum laeve (L.) A.& D. Löve var. geyeri (A. Gray) G.L. Nesom   [FNA20] 2 smooth aster
Symphyotrichum lanceolatum (Willdenow) G. L. Nesom var. hesperium (A. Gray) G. L. Nesom   [FNA20] 1 lance-leaved or panicled or white panicled aster
Symphyotrichum novae-angliae (L.) G.L. Nesom   [FNA20] 1 New England aster
Symphyotrichum spathulatum (Lindley) G. L. Nesom var. intermedium (A. Gray) G. L. Nesom   [FNA20] 2
Symphyotrichum spathulatum (Lindl.) G.L. Nesom var. spathulatum    [FNA20] 2 Western mountain aster
Symphyotrichum subspicatum (Nees) G. L. Nesom   [FNA20] 8 Douglas’s aster, Douglas' aster
Tanacetum balsamita L.   [FNA19] 2 costmary
Tanacetum bipinnatum (L.) Schultz-Bipontinus,   [FNA19] 3
Tanacetum parthenium (L.) Sch. Bip.   [FNA19] 1 feverfew, featherfew
Tanacetum vulgare L.   [FNA19, H&C] 0 common tansy
Taraxacum ceratophorum (Ledeb.) DC.   [FNA19, H&C] 6 horned dandelion
Taraxacum erythrospermum Andrzejowski ex Besser   [FNA19] 4 red-seeded dandelion
Taraxacum officinale Weber ex F.H. Wigg.   [FNA19, H&C] 2 common dandelion
Tetradymia canescens DC.   [FNA20, H&C] 1 gray horsebrush, spineless horsebrush
Tonestus lyallii (A. Gray) A. Nelson   [FNA20] 1 Lyall's goldenweed, Lyall's serpentweed
Townsendia florifer (Hook.) A. Gray   [FNA20, H&C] 2 showy townsendia, showy Townsend-daisy
Tragopogon dubius Scop.   [FNA19, H&C] 0 yellow salsify, meadow goatsbeard
Tragopogon floccosus Waldst. & Kit. 0 woolly goatsbeard
Tragopogon mirus Ownbey   [FNA19, H&C] 0 remarkable goatsbeard
Tragopogon miscellus Ownbey   [FNA19, H&C] 0 hybrid goatsbeard
Tragopogon porrifolius L.   [FNA19, H&C] 0 purple salsify, oyster plant
Tragopogon pratensis L.   [FNA19, H&C] 1 meadow salsify, jack go to bed at noon
Tripleurospermum inodorum (L.) Sch. Bip.   [FNA19] 5 scentless or false mayweed, false chamomile
Tripleurospermum maritimum (L.) W.D.J. Koch ssp. maritimum    [FNA19] 3
Tussilago farfara L.   [FNA20, H&C] 0 coltsfoot
Uropappus lindleyi (DC.) Nutt.   [FNA19] 3 linearleaf microseris, silver puffs, Lindley's false silverpuffs
Wyethia amplexicaulis (Nutt.) Nutt.   [FNA21, H&C] 0 northern mule's ears, smooth dwarf sunflower
Wyethia angustifolia (DC.) Nutt.   [FNA21, H&C] 3 narrowleaf wyethia, narrow leaved mule's ears, California compassplant
Xanthium spinosum L.   [FNA21, H&C] 2 spiny cockleburr, spiny clotbur
Xanthium strumarium L.   [FNA21, H&C] 6 Canada cocklebur, common cocklebur


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