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Washington Flora Checklist A Checklist of the Vascular Plants of Washington State Hosted by the University of Washington Herbarium |
About| Asteraceae (Aster Family) |
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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
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| 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 [FNA20] | 4 | Oregon agoseris |
| Agoseris aurantiaca (Hook.) Greene var. aurantiaca [FNA19] | 10 | orange agoseris, slender agoseris |
| Agoseris elata (Nutt.) Greene [FNA19] | 0 | tall agoseris, tall goat-chicory |
| Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & A. Gray) Jeps. [FNA19] | 3 | 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 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] | 0 | 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] | 1 | woodrush pussytoes, silvery brown everlasting |
| Antennaria media Greene [FNA19] | 1 | alpine pussytoes, Rocky Mountain pussytoes |
| Antennaria microphylla Rydb. [FNA19] | 0 | 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 austriaca Jacq. [Stace] | 0 | Austrian chamomile |
| Anthemis cotula L. [FNA19] | 0 | mayweed chamomile, dogfennel, stinking chamomile |
| Anthemis tinctoria L. [Stace] | 0 | yellow chamomile, golden chamomile, golden marguerite |
| 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] | 4 | 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. ssp. caudata (Michx.) H. M. Hall & Clem. [FNA19] | 1 | |
| Artemisia campestris L. var. scouleriana (Besser) Cronquist [H&C] | 5 | Scouler's wormwood, Pacific sagewort |
| Artemisia campestris L. var. wormskioldii (Besser) Cronquist [H&C] | 1 | Columbia Islands sagewort |
| 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 | |
| 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 tripartita Rydb. ssp. tripartita [FNA19] | 0 | threetip sagebrush, cutleaf sagebrush |
| Artemisia vulgaris L. [H&C, FNA19] | 2 | mugwort, lobed wormwood |
| Baccharis pilularis DC. [FNA20] | 0 | chaparral broom |
| Balsamorhiza ×bonseri St. John (pro sp.) | 0 | hybrid balsamroot |
| Balsamorhiza careyana A. Gray [FNA21] | 0 | Carey's balsamroot |
| Balsamorhiza deltoidea Nutt. [H&C, FNA21] | 0 | Puget balsamroot, deltoid balsamroot |
| Balsamorhiza hookeri Nutt. [FNA21] | 6 | Hooker's 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. [H&C, FNA19] | 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] | 2 | 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. puberulus (D.C. Eaton) 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 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 |
| 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. [H&C, FNA19] | 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 |
| Cyclochaena xanthiifolia (Nuttall) Fresenius [FNA21] | 1 | tall marsh elder, burweed marsh elder, carelessweed |
| Dieteria canescens (Pursh) Nuttall var. incana (Lindley) D. R. Morgan & R. L. Hartman, [FNA20] | 6 | hoary-aster |
| Eatonella nivea (D.C. Eaton) A. Gray [FNA21] | 1 | white eatonella, white false tickhead |
| Echinops exaltatus Schrad. [FNA19] | 0 | tall globe thistle |
| Echinops rito L. ssp. ruthenicus (Bieb.) Nyman [FNA19] | 1 | southern 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 |
| Erechtites minima (Poir.) DC. [FNA20] | 1 | Australian bornweed, toothed coast 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 acris L. var. debilis A. Gray [H&C] | 2 | northern daisy |
| Erigeron acris L. var. elatus (Hook.) Cronquist [H&C] | 3 | swamp 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 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 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] | 6 | |
| 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] | 0 | desert yellow daisy, lineleaf fleabane |
| Erigeron lonchophyllus Hook. [FNA20, H&C] | 2 | spear leaved fleabane, short rayed daisy |
| Erigeron oreganus A. Gray [FNA20, H&C] | 0 | gorge daisy, Oregon fleabane |
| Erigeron peregrinus (Pursh) Greene var. peregrinus [FNA20] | 3 | |
| 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] | 0 | 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] | 1 | common eriophyllum, common wooly sunflower |
| 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] | 1 | 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] | 3 | 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 purpurea (L.) Cabrera [FNA, 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] | 0 | |
| 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 | |
| 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] | 1 | 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 |
| 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] | 2 | pineapple weed |
| Microseris bigelovii (Gray) Sch. Bip. [FNA19, H&C] | 0 | coast microseris, coastal silverpuffs |
| Microseris borealis (Bong.) Sch. Bip. [FNA19, H&C] | 1 | 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 Trock & T. M. Barkley, var. subnuda [FNA20] | 5 | 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] | 0 | 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 echioides L. [Stace] | 0 | bristly oxtongue |
| Picris hieracioides L. [FNA19] | 1 | |
| Prenanthes alata (Hook.) D. Dietr. [FNA19, H&C] | 1 | western rattlesnake root |
| Pseudognaphalium californicum (DC.) A. Anderb. [FNA19] | 1 | ladies tobacco |
| Pseudognaphalium canescens (de Candolle) Anderberg [FNA19] | 1 | Wright’s rabbit-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] | 4 | 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 |
| 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 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 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 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 | |
| Symphyotrichum boreale (Torr. & A. Gray) A.& D. Löve [FNA] | 3 | rush aster, slender white aster, northern bog 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] | 3 | Cusick's aster, Cusick's American aster |
| Symphyotrichum eatonii (Gray) G.L. Nesom [FNA20] | 1 | Eaton's aster, Oregon 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 (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] | 3 | 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] | 2 | 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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