| absinth wormwood |
Artemisia absinthium |
7 |
| Aleutian wormwood |
Artemisia aleutica |
6 |
| alkalai marsh aster |
Almutaster pauciflorus |
4 |
| alpine leafybract aster |
Symphyotrichum foliaceum var. foliaceum |
22 |
| alpine sagebrush |
Artemisia scopulorum |
15 |
| alpine sagewort |
Artemisia norvegica |
6 |
| arctic alpine fleabane |
Erigeron humilis |
11 |
| arctic aster |
Eurybia sibirica |
15 |
| arctic daisy |
Chrysanthemum arcticum |
11 |
| arctic groundsel |
Tephroseris atropurpurea |
9 |
| arctic sweet coltsfoot |
Petasites frigidus |
5 |
| arctic wormwood |
Artemisia senjavinensis |
3 |
| Arizona mule-ears |
Wyethia arizonica |
3 |
| arnica |
Arnica alpina |
7 |
| arrowleaf balsamroot |
Balsamorhiza sagittata |
12 |
| arrowleaf ragwort |
Senecio triangularis |
4 |
| Aster |
|
1 |
| bahia |
Bahia spp. |
2 |
| bashful ragwort |
Senecio pudicus |
8 |
| beautiful fleabane |
Erigeron formosissimus |
17 |
| big sagebrush |
Artemisia tridentata |
13 |
| blackhead fleabane |
Erigeron melanocephalus |
15 |
| blanketflower |
Gaillardia aristata |
15 |
| blow wives |
Achyrachaena mollis |
11 |
| blue lettuce |
Lactuca tatarica var. pulchella |
7 |
| boreal sagebrush |
Artemisia borealis |
10 |
| brassbuttons |
Cotula coronopifolia |
1 |
| broadleaf arnica |
Arnica latifolia |
19 |
| broom snakeweed |
Gutierrezia sarothrae |
3 |
| broomlike ragwort |
Senecio spartioides var. spartioides |
6 |
| bull thistle |
Cirsium vulgare |
2 |
| Cainville thistle |
Cirsium calcareum |
6 |
| California goldfields |
Lasthenia californica |
13 |
| Canada goldenrod |
Solidago canadensis |
9 |
| Canada thistle |
Cirsium arvense |
18 |
| cat's ear |
Hypochaeris spp. |
1 |
| Chamisso arnica |
Arnica chamissonis |
8 |
| chicory |
Cichorium intybus |
6 |
| Colorado ragwort |
Senecio soldanella |
7 |
| common burdock |
Arctium minus |
8 |
| common cocklebur |
Xanthium strumarium |
3 |
| common groundsel |
Senecio vulgaris |
1 |
| common sagewort |
Artemisia campestris |
3 |
| common stickyseed |
Blennosperma nanum |
6 |
| common sunflower |
Helianthus annuus |
16 |
| common tansy |
Tanacetum vulgare |
4 |
| common tarweed |
Centromadia pungens ssp. pungens |
3 |
| common yarrow |
Achillea millefolium |
11 |
| curlycup gumweed |
Grindelia squarrosa |
7 |
| cutleaf daisy |
Erigeron compositus |
19 |
| dandelion |
Taraxacum officinale |
3 |
| Douglas rabbitbrush |
Chrysothamnus viscidiflorus |
5 |
| Douglas' dustymaiden |
Chaenactis douglasii |
13 |
| Douglas' silverpuffs |
Microseris douglasii |
4 |
| dwarf mountain ragwort |
Senecio fremontii |
5 |
| Eaton's fleabane |
Erigeron eatonii |
9 |
| Eaton's thistle |
Cirsium eatonii |
2 |
| Engelmann's aster |
Eucephalus engelmannii |
7 |
| false mayweed |
Tripleurospermum maritimum |
9 |
| featherleaf fleabane |
Erigeron pinnatisectus |
6 |
| Fitch's tarweed |
Hemizonia fitchii |
14 |
| fivenerve helianthella |
Helianthella quinquenervis |
5 |
| Fremont's goldfields |
Lasthenia fremontii |
4 |
| fuscate groundsel |
Tephroseris lindstroemii |
3 |
| goatsbeard |
Tragopogon spp. |
1 |
| goldenrod |
Solidago spp. |
1 |
| goldfields |
Lasthenia spp. |
3 |
| graylocks four-nerve daisy |
Tetraneuris grandiflora |
9 |
| Great Valley gumweed |
Grindelia camporum |
8 |
| groundsel |
Tephroseris frigida |
5 |
| groundsel |
Tephroseris spp. |
7 |
| gumweed |
Grindelia spp. |
1 |
| hairy arnica |
Arnica mollis |
11 |
| hairy false goldenaster |
Heterotheca villosa |
12 |
| heartleaf arnica |
Arnica cordifolia |
10 |
| Holm's ragwort |
Senecio amplectens var. holmii |
4 |
| horned dandelion |
Taraxacum ceratophorum |
7 |
| horseweed |
Conyza canadensis |
10 |
| Italian plumeless thistle |
Carduus pycnocephalus |
5 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
5 |
| knapweeds |
Centaurea spp. |
1 |
| large mountain fleabane |
Erigeron coulteri |
15 |
| limestone hawksbeard |
Crepis intermedia |
4 |
| little sagebrush |
Artemisia arbuscula |
1 |
| Louisiana wormwood |
Artemisia ludoviciana |
11 |
| meadow salsify |
Tragopogon lamottei |
3 |
| Michaux's wormwood |
Artemisia michauxiana |
6 |
| Missouri goldenrod |
Solidago missouriensis |
6 |
| mountain thistle |
Cirsium scopulorum |
12 |
| Mt. Albert goldenrod |
Solidago simplex |
11 |
| mule-ears |
Wyethia amplexicaulis |
6 |
| musk thistle |
Carduus nutans |
8 |
| narrowleaf saw-wort |
Saussurea angustifolia |
4 |
| Newberry's hymenopappus |
Hymenopappus newberryi |
13 |
| northern dandelion |
Taraxacum phymatocarpum |
15 |
| Nuttall's sunflower |
Helianthus nuttallii |
5 |
| onestem fleabane |
Erigeron simplex |
10 |
| orange agoseris |
Agoseris aurantiaca |
12 |
| orange sneezeweed |
Hymenoxys hoopesii |
6 |
| Oregon fleabane |
Erigeron speciosus |
8 |
| Oregon woollyheads |
Psilocarphus oregonus |
2 |
| oxeye daisy |
Leucanthemum vulgare |
15 |
| pale agoseris |
Agoseris glauca |
21 |
| Parry rabbitbrush |
Ericameria parryi |
15 |
| Parry's arnica |
Arnica parryi |
10 |
| Parry's goldenrod |
Oreochrysum parryi |
8 |
| pearly everlasting |
Anaphalis margaritacea |
9 |
| pearly pussytoes |
Antennaria anaphaloides |
14 |
| pineapple-weed |
Matricaria discoidea |
4 |
| pingue rubberweed |
Hymenoxys richardsonii |
11 |
| prairie sagewort |
Artemisia frigida |
11 |
| prickly lettuce |
Lactuca serriola |
11 |
| purple fleabane |
Erigeron purpuratus |
10 |
| pygmy goldenweed |
Tonestus pygmaeus |
9 |
| pygmy pussytoes |
Antennaria monocephala |
1 |
| ragleaf bahia |
Bahia dissecta |
7 |
| ragwort |
Senecio spp. |
1 |
| rockslide yellow fleabane |
Erigeron leiomerus |
11 |
| Rocky Mountain goldenrod |
Solidago multiradiata |
29 |
| rosy pussytoes |
Antennaria rosea |
5 |
| rubber rabbitbrush |
Ericameria nauseosa |
13 |
| running fleabane |
Erigeron colomexicanus |
5 |
| sagebrush |
Artemisia spp. |
3 |
| sand sagebrush |
Artemisia filifolia |
5 |
| Santa Cruz tarplant |
Holocarpha macradenia |
8 |
| saw-wort |
Saussurea subacaulis |
21 |
| shortray fleabane |
Erigeron lonchophyllus |
10 |
| slender hawkweed |
Hieracium gracile |
7 |
| slender woollyheads |
Psilocarphus tenellus |
1 |
| small wirelettuce |
Stephanomeria exigua |
6 |
| small-leaf pussytoes |
Antennaria parvifolia |
10 |
| smooth blue aster |
Symphyotrichum laeve var. laeve |
11 |
| smooth cat's ear |
Hypochaeris glabra |
7 |
| smooth goldfields |
Lasthenia glaberrima |
4 |
| smooth tidytips |
Layia chrysanthemoides |
10 |
| spineless horsebrush |
Tetradymia canescens |
5 |
| spiny sowthistle |
Sonchus asper |
6 |
| sprucefir fleabane |
Erigeron eximius |
8 |
| stemless thistle |
Cirsium tioganum |
22 |
| stinking chamomile |
Anthemis cotula |
3 |
| streamside fleabane |
Erigeron glabellus |
5 |
| subalpine fleabane |
Erigeron peregrinus |
26 |
| Suisun Marsh aster |
Symphyotrichum lentum |
7 |
| tall fleabane |
Erigeron elatior |
9 |
| tall lettuce |
Lactuca canadensis |
5 |
| tall ragwort |
Senecio serra |
6 |
| tarragon |
Artemisia dracunculus |
9 |
| tasselflower brickellbush |
Brickellia grandiflora |
7 |
| thistle |
Cirsium spp. |
12 |
| trailing fleabane |
Erigeron flagellaris |
3 |
| umber pussytoes |
Antennaria umbrinella |
2 |
| western aster |
Symphyotrichum ascendens |
28 |
| western marsh cudweed |
Gnaphalium palustre |
2 |
| western mountain aster |
Symphyotrichum spathulatum var. spathulatum |
12 |
| western salsify |
Tragopogon dubius |
4 |
| white hawkweed |
Hieracium albiflorum |
5 |
| white panicle aster |
Symphyotrichum lanceolatum |
8 |
| whitestem goldenbush |
Ericameria discoidea |
11 |
| woollyheads |
Psilocarphus spp. |
1 |
| yellow starthistle |
Centaurea solstitialis |
6 |
| yellowspine thistle |
Cirsium ochrocentrum |
3 |
