| 'ena'ena |
Pseudognaphalium sandwicensium var. molokaiense |
4 |
| absinth wormwood |
Artemisia absinthium |
4 |
| Aleutian wormwood |
Artemisia aleutica |
3 |
| alkalai marsh aster |
Almutaster pauciflorus |
2 |
| alpine fleabane |
Erigeron alpinus |
1 |
| alpine knapweed |
Centaurea nigrescens |
2 |
| alpine leafybract aster |
Symphyotrichum foliaceum var. foliaceum |
11 |
| alpine sagebrush |
Artemisia scopulorum |
8 |
| American burnweed |
Erechtites hieraciifolius |
4 |
| American everlasting |
Gamochaeta americana |
1 |
| American star-thistle |
Centaurea americana |
6 |
| American trailplant |
Adenocaulon bicolor |
3 |
| anisescented goldenrod |
Solidago odora |
1 |
| annual bursage |
Ambrosia acanthicarpa |
3 |
| annual fleabane |
Erigeron annuus |
1 |
| annual marshelder |
Iva annua |
1 |
| annual ragweed |
Ambrosia artemisiifolia var. elatior |
3 |
| annual sowthistle |
Sonchus oleraceus |
16 |
| arctic alpine fleabane |
Erigeron humilis |
3 |
| arctic aster |
Eurybia sibirica |
10 |
| arctic daisy |
Chrysanthemum arcticum |
10 |
| arctic groundsel |
Tephroseris atropurpurea |
4 |
| arctic sweet coltsfoot |
Petasites frigidus |
1 |
| Arizona mule-ears |
Wyethia arizonica |
1 |
| Arizona thistle |
Cirsium arizonicum |
1 |
| arnica |
Arnica alpina |
2 |
| arrowleaf balsamroot |
Balsamorhiza sagittata |
21 |
| arrowleaf ragwort |
Senecio triangularis |
4 |
| Aster |
|
2 |
| aster |
Symphyotrichum spp. |
10 |
| Australian burnweed |
Erechtites minimus |
2 |
| bahia |
Bahia spp. |
2 |
| balsam groundsel |
Packera paupercula |
5 |
| barrens silky aster |
Symphyotrichum pratense |
9 |
| bashful ragwort |
Senecio pudicus |
3 |
| Bay Biscayne creeping-oxeye |
Sphagneticola trilobata |
6 |
| bearded beggarticks |
Bidens aristosa |
2 |
| beautiful fleabane |
Erigeron formosissimus |
8 |
| biennial wormwood |
Artemisia biennis |
2 |
| big sagebrush |
Artemisia tridentata |
14 |
| Bigelow's tansyaster |
Machaeranthera bigelovii var. bigelovii |
2 |
| bitter lettuce |
Lactuca virosa |
4 |
| bitter sneezeweed |
Helenium amarum |
5 |
| black knapweed |
Centaurea nigra |
2 |
| black-eyed susan |
Rudbeckia hirta |
28 |
| black-seeded daisy |
Brachyscome melanocarpa |
1 |
| blackhead fleabane |
Erigeron melanocephalus |
10 |
| blanket-flower |
Gaillardia x grandiflora |
4 |
| blanketflower |
Gaillardia aristata |
11 |
| blanketflower |
Gaillardia spp. |
1 |
| blessed milkthistle |
Silybum marianum |
7 |
| blessed thistle |
Cnicus benedictus |
2 |
| blow wives |
Achyrachaena mollis |
4 |
| blue lettuce |
Lactuca perennis |
1 |
| blue lettuce |
Lactuca tatarica var. pulchella |
5 |
| blue mistflower |
Conoclinium coelestinum |
27 |
| bluemink |
Ageratum houstonianum |
2 |
| boneset |
Eupatorium perfoliatum |
12 |
| boreal sagebrush |
Artemisia borealis |
5 |
| brassbuttons |
Cotula coronopifolia |
3 |
| bristly hawksbeard |
Crepis setosa |
1 |
| bristly oxtongue |
Helminthotheca echioides |
3 |
| broadleaf arnica |
Arnica latifolia |
14 |
| broom snakeweed |
Gutierrezia sarothrae |
6 |
| broomlike ragwort |
Senecio spartioides |
2 |
| broomlike ragwort |
Senecio spartioides var. spartioides |
5 |
| bull cottonthistle |
Onopordum tauricum |
1 |
| bull thistle |
Cirsium vulgare |
15 |
| bur beggarticks |
Bidens tripartita |
4 |
| burdock |
Arctium spp. |
1 |
| caespitose four-nerve daisy |
Tetraneuris acaulis var. caespitosa |
2 |
| Cainville thistle |
Cirsium calcareum |
1 |
| California goldfields |
Lasthenia californica |
7 |
| California mugwort |
Artemisia douglasiana |
2 |
| calotis |
Calotis spp. |
1 |
| camphorweed |
Heterotheca subaxillaris |
6 |
| Canada goldenrod |
Solidago canadensis |
7 |
| Canada goldenrod |
Solidago canadensis var. scabra |
15 |
| Canada thistle |
Cirsium arvense |
9 |
| Canadian horseweed |
Conyza canadensis var. canadensis |
1 |
| Canadian horseweed |
Conyza canadensis var. pusilla |
4 |
| cape ivy |
Delairea odorata |
5 |
| capeweed |
Arctotheca calendula |
5 |
| cardoon |
Cynara cardunculus |
2 |
| carline thistle |
Carlina acaulis |
1 |
| Carolina falsedandelion |
Pyrrhopappus carolinianus |
1 |
| Chamisso arnica |
Arnica chamissonis |
4 |
| chicory |
Cichorium intybus |
6 |
| clasping coneflower |
Dracopis amplexicaulis |
2 |
| climbing aster |
Ampelaster carolinianus |
24 |
| climbing hempweed |
Mikania scandens |
32 |
| clusterflower |
Flaveria trinervia |
1 |
| coastal nehe |
Lipochaeta lavarum |
7 |
| coastal plain honeycombhead |
Balduina angustifolia |
8 |
| coastal plain tickseed |
Coreopsis gladiata |
1 |
| coat buttons |
Tridax procumbens |
9 |
| Colorado ragwort |
Senecio soldanella |
5 |
| coltsfoot |
Tussilago farfara |
8 |
| common brighteyes |
Reichardia picroides |
2 |
| common burdock |
Arctium minus |
4 |
| common cocklebur |
Xanthium strumarium |
14 |
| common crupina |
Crupina vulgaris |
5 |
| common groundsel |
Senecio vulgaris |
4 |
| common ragweed |
Ambrosia artemisiifolia |
8 |
| common sagewort |
Artemisia campestris |
2 |
| common salsify |
Tragopogon porrifolius |
2 |
| common sneezeweed |
Helenium autumnale |
1 |
| common stickyseed |
Blennosperma nanum |
4 |
| common sunflower |
Helianthus annuus |
11 |
| common tansy |
Tanacetum vulgare |
10 |
| common tarweed |
Centromadia pungens ssp. pungens |
9 |
| common woolly sunflower |
Eriophyllum lanatum |
3 |
| common yarrow |
Achillea millefolium |
18 |
| compassplant |
Silphium laciniatum |
2 |
| coneflowers |
Echinacea spp. |
3 |
| corn chamomile |
Anthemis arvensis |
2 |
| cornflower |
Centaurea cyanus |
1 |
| cottony goldenaster |
Chrysopsis gossypina ssp. cruiseana |
10 |
| Coulter's horseweed |
Laennecia coulteri |
1 |
| creeping croftonweed |
Ageratina riparia |
1 |
| cressleaf groundsel |
Packera glabella |
2 |
| croftonweed |
Ageratina adenophora |
1 |
| crownbeard |
Verbesina encelioides |
13 |
| cudweed |
Gnaphalium spp. |
5 |
| cup rosinweed |
Silphium perfoliatum |
2 |
| Cupid's-shaving-brush |
Emilia fosbergii |
12 |
| cure for all |
Pluchea carolinensis |
18 |
| curlycup gumweed |
Grindelia squarrosa |
10 |
| curlycup gumweed |
Grindelia squarrosa var. serrulata |
4 |
| cut-leaf daisy |
Brachyscome multifida |
2 |
| cutleaf burnweed |
Erechtites glomeratus |
2 |
| cutleaf coneflower |
Rudbeckia laciniata |
15 |
| cutleaf daisy |
Erigeron compositus |
15 |
| dahlia |
Dahlia spp. |
1 |
| Daisy Family |
Bidens riparia |
1 |
| dandelion |
Taraxacum officinale |
14 |
| dandelion |
Taraxacum spp. |
1 |
| desert ragwort |
Senecio eremophilus |
2 |
| devils beggarticks |
Bidens frondosa |
4 |
| diffuse knapweed |
Centaurea diffusa |
24 |
| dogfennel |
Eupatorium capillifolium |
7 |
| dotted gayfeather |
Liatris punctata |
1 |
| Douglas rabbitbrush |
Chrysothamnus viscidiflorus |
6 |
| Douglas' dustymaiden |
Chaenactis douglasii |
7 |
| Douglas' silverpuffs |
Microseris douglasii |
2 |
| dubautia |
Dubautia spp. |
1 |
| dune tetramolopium |
Tetramolopium rockii |
12 |
| dwarf mountain ragwort |
Senecio fremontii |
4 |
| early bluetop fleabane |
Erigeron vetensis |
2 |
| eastern baccharis |
Baccharis halimifolia |
40 |
| eastern fournerved daisy |
Tetraneuris herbacea |
10 |
| eastern showy aster |
Eurybia conspicua |
1 |
| Eaton's fleabane |
Erigeron eatonii |
6 |
| eclipta |
Eclipta prostrata |
1 |
| edelweiss |
Leontopodium alpinum |
1 |
| elephantsfoot |
Elephantopus spp. |
10 |
| elephantsfoot |
Elephantopus tomentosus |
8 |
| Emory's rockdaisy |
Perityle emoryi |
4 |
| Engelmann's aster |
Eucephalus engelmannii |
5 |
| English daisy |
Bellis perennis |
2 |
| European goldenrod |
Solidago virgaurea |
1 |
| false chamomile |
Tripleurospermum perforatum |
3 |
| false mayweed |
Tripleurospermum maritimum |
5 |
| false sowthistle |
Reichardia tingitana |
1 |
| featherleaf fleabane |
Erigeron pinnatisectus |
2 |
| Fendler's ragwort |
Senecio fendleri |
2 |
| feverfew |
Tanacetum parthenium |
3 |
| fewflower blazing star |
Liatris pauciflora |
4 |
| fewleaf sunflower |
Helianthus occidentalis |
1 |
| fiddleleaf hawksbeard |
Crepis runcinata |
1 |
| field marigold |
Calendula arvensis |
2 |
| fineleaf hymenopappus |
Hymenopappus filifolius |
2 |
| Fitch's tarweed |
Hemizonia fitchii |
12 |
| fivenerve helianthella |
Helianthella quinquenervis |
3 |
| fleabanes |
Erigeron spp. |
6 |
| Fremont's goldfields |
Lasthenia fremontii |
2 |
| fuscate groundsel |
Tephroseris lindstroemii |
2 |
| Georgia aster |
Symphyotrichum georgianum |
11 |
| giant ragweed |
Ambrosia trifida |
6 |
| giant sumpweed |
Cyclachaena xanthifolia |
2 |
| glandular Cape marigold |
Dimorphotheca sinuata |
2 |
| goatsbeard |
Tragopogon spp. |
4 |
| Godfrey's blazing star |
Liatris provincialis |
4 |
| goldenrod |
Solidago spp. |
12 |
| goldenweed |
Croptilon divaricatum |
3 |
| goldfields |
Lasthenia spp. |
2 |
| grassleaf Barbara's buttons |
Marshallia graminifolia var. cynanthera |
11 |
| gravelweed |
Verbesina helianthoides |
3 |
| gray goldenrod |
Solidago nemoralis |
4 |
| graylocks four-nerve daisy |
Tetraneuris grandiflora |
10 |
| great coneflower |
Rudbeckia maxima |
19 |
| great globethistle |
Echinops sphaerocephalus |
1 |
| Great Valley gumweed |
Grindelia camporum |
5 |
| Great Valley gumweed |
Grindelia camporum var. camporum |
1 |
| green and gold |
Chrysogonum virginianum |
8 |
| green prairie coneflower |
Ratibida tagetes |
2 |
| groundsel |
Tephroseris frigida |
4 |
| groundsel |
Tephroseris spp. |
6 |
| hairy arnica |
Arnica mollis |
5 |
| hairy beggarticks |
Bidens pilosa |
8 |
| hairy cat's ear |
Hypochaeris radicata |
7 |
| hairy chaffhead |
Carphephorus paniculatus |
7 |
| hairy false goldenaster |
Heterotheca villosa |
10 |
| hairy false goldenaster |
Heterotheca villosa var. villosa |
4 |
| hairy fleabane |
Conyza bonariensis |
9 |
| hairy galinsoga |
Galinsoga quadriradiata |
2 |
| hairy goldenrod |
Solidago hispida |
4 |
| hairy sunflower |
Helianthus hirsutus |
7 |
| hairy white oldfield aster |
Symphyotrichum pilosum var. pilosum |
1 |
| hairyseed bahia |
Bahia absinthifolia |
1 |
| Haleakala tetramolopium |
Tetramolopium humile ssp. haleakalae |
4 |
| Hawai'i silversword |
Argyroxiphium sandwicense ssp. macrocephalum |
40 |
| Hawai'i silversword |
Argyroxiphium sandwicense ssp. sandwicense |
5 |
| hawkweed oxtongue |
Picris hieracioides |
1 |
| hawkweeds |
Hieracium spp. |
3 |
| heartleaf arnica |
Arnica cordifolia |
6 |
| Hill's thistle |
Cirsium hillii |
3 |
| hoary groundsel |
Packera werneriifolia |
1 |
| hoary Townsend daisy |
Townsendia incana |
2 |
| Holm's ragwort |
Senecio amplectens var. holmii |
3 |
| horned dandelion |
Taraxacum ceratophorum |
4 |
| horseweed |
Conyza canadensis |
15 |
| Iberian knapweed |
Centaurea pullata |
2 |
| iliau |
Wilkesia gymnoxiphium |
1 |
| Indian camphorweed |
Pluchea indica |
6 |
| Indian thistle |
Cirsium edule |
1 |
| ironweed |
Vernonia spp. |
3 |
| Italian hawksbeard |
Crepis bursifolia |
2 |
| Italian plumeless thistle |
Carduus pycnocephalus |
7 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
7 |
| Jerusalem artichoke |
Helianthus tuberosus |
20 |
| kau silversword |
Argyroxiphium kauense |
1 |
| Kellogg's tarweed |
Deinandra kelloggii |
1 |
| kidneyleaf rosinweed |
Silphium compositum |
8 |
| knapweeds |
Centaurea spp. |
1 |
| Kure Atoll nehe |
Lipochaeta integrifolia |
17 |
| lacy tansyaster |
Machaeranthera pinnatifida |
1 |
| lanceleaf blanketflower |
Gaillardia aestivalis |
3 |
| lanceleaf tickseed |
Coreopsis lanceolata |
8 |
| large mountain fleabane |
Erigeron coulteri |
7 |
| largeflower tickseed |
Coreopsis grandiflora |
1 |
| largeflower Townsend daisy |
Townsendia grandiflora |
2 |
| Latin American fleabane |
Erigeron karvinskianus |
6 |
| lawn burweed |
Soliva sessilis |
2 |
| Le Conte's thistle |
Cirsium lecontei |
1 |
| lesser hawkbit |
Leontodon taraxacoides |
2 |
| limestone hawksbeard |
Crepis intermedia |
3 |
| little sagebrush |
Artemisia arbuscula |
1 |
| Louisiana wormwood |
Artemisia ludoviciana |
6 |
| Madagascar ragwort |
Senecio madagascariensis |
10 |
| Malta starthistle |
Centaurea melitensis |
6 |
| marsh fleabane |
Senecio congestus |
1 |
| Maui beggarticks |
Bidens mauiensis |
1 |
| Maui wormwood |
Artemisia mauiensis |
2 |
| Mauna Kea dubautia |
Dubautia arborea |
2 |
| Mauna Loa beggarticks |
Bidens menziesii |
2 |
| Maximilian sunflower |
Helianthus maximiliani |
1 |
| meadow hawkweed |
Hieracium caespitosum |
1 |
| meadow knapweed |
Centaurea moncktonii |
1 |
| meadow salsify |
Tragopogon lamottei |
4 |
| meadow thistle |
Cirsium scariosum |
5 |
| Mexican brassbuttons |
Cotula mexicana |
1 |
| Mexican flamevine |
Pseudogynoxys chenopodioides |
2 |
| Michaelmas daisy |
Aster sedifolius |
1 |
| Michaux's wormwood |
Artemisia michauxiana |
2 |
| mile-a-minute |
Mikania micrantha |
5 |
| Missouri goldenrod |
Solidago missouriensis |
3 |
| Mohr's Barbara's buttons |
Marshallia mohrii |
1 |
| mountain big sagebrush |
Artemisia tridentata ssp. vaseyana |
1 |
| mountain dubautia |
Dubautia menziesii |
47 |
| mountain thistle |
Cirsium scopulorum |
9 |
| mouseear hawkweed |
Hieracium pilosella |
1 |
| mouseear hawkweed |
Hieracium pilosella var. niveum |
1 |
| Mt. Albert goldenrod |
Solidago simplex |
3 |
| mule-ears |
Wyethia amplexicaulis |
9 |
| musk thistle |
Carduus nutans |
6 |
| narrowleaf goldenrod |
Euthamia graminifolia |
5 |
| narrowleaf hawksbeard |
Crepis tectorum |
1 |
| narrowleaf saw-wort |
Saussurea angustifolia |
1 |
| nehe |
Lipochaeta spp. |
2 |
| New England aster |
Symphyotrichum novae-angliae |
6 |
| New Mexico groundsel |
Packera neomexicana var. neomexicana |
1 |
| New Mexico thistle |
Cirsium neomexicanum |
3 |
| New York ironweed |
Vernonia noveboracensis |
7 |
| Newberry's hymenopappus |
Hymenopappus newberryi |
9 |
| nodding beggarticks |
Bidens cernua |
17 |
| nodding ragwort |
Senecio bigelovii var. bigelovii |
1 |
| North African knapweed |
Centaurea diluta |
1 |
| northern dandelion |
Taraxacum phymatocarpum |
9 |
| Nuttall's sunflower |
Helianthus nuttallii |
4 |
| oneflower helianthella |
Helianthella uniflora |
1 |
| onestem fleabane |
Erigeron simplex |
8 |
| Ontario blazing star |
Liatris cylindracea |
5 |
| Ontario goldenrod |
Solidago simplex ssp. randii var. ontarioensis |
6 |
| orange agoseris |
Agoseris aurantiaca |
5 |
| orange coneflower |
Rudbeckia fulgida |
6 |
| orange hawkweed |
Hieracium aurantiacum |
8 |
| orange sneezeweed |
Hymenoxys hoopesii |
10 |
| Oregon fleabane |
Erigeron speciosus |
11 |
| Oregon woollyheads |
Psilocarphus oregonus |
2 |
| osteospermum |
Osteospermum jucundum |
1 |
| oxeye |
Heliopsis helianthoides |
2 |
| oxeye daisy |
Leucanthemum vulgare |
28 |
| pale agoseris |
Agoseris glauca |
9 |
| pale echinacea |
Echinacea pallida |
1 |
| paleleaf woodland sunflower |
Helianthus strumosus |
4 |
| pappose tarweed |
Centromadia parryi ssp. rudis |
3 |
| Paraguay starbur |
Acanthospermum australe |
3 |
| parasol whitetop |
Doellingeria umbellata var. umbellata |
10 |
| Parry rabbitbrush |
Ericameria parryi |
8 |
| Parry's arnica |
Arnica parryi |
6 |
| Parry's dwarf-sunflower |
Helianthella parryi |
1 |
| Parry's goldenrod |
Oreochrysum parryi |
6 |
| Parry's rabbitbrush |
Ericameria parryi var. parryi |
1 |
| Parry's Townsend daisy |
Townsendia parryi |
1 |
| pearly everlasting |
Anaphalis margaritacea |
11 |
| pearly pussytoes |
Antennaria anaphaloides |
4 |
| peregrine thistle |
Cirsium cymosum |
1 |
| perennial sowthistle |
Sonchus arvensis |
1 |
| Peruvian zinnia |
Zinnia peruviana |
2 |
| pineapple-weed |
Matricaria discoidea |
6 |
| pingue rubberweed |
Hymenoxys richardsonii |
9 |
| pink bogbutton |
Sclerolepis uniflora |
8 |
| plains blackfoot |
Melampodium leucanthum |
1 |
| plains coreopsis |
Coreopsis tinctoria |
3 |
| plantainleaf pussytoes |
Antennaria plantaginifolia |
8 |
| poor-robin fleabane |
Erigeron pulchellus |
1 |
| poverty sumpweed |
Iva axillaris |
7 |
| prairie sagewort |
Artemisia frigida |
2 |
| prairie sunflower |
Helianthus petiolaris |
1 |
| prickly lettuce |
Lactuca serriola |
4 |
| purple coneflower |
Echinacea purpurea |
8 |
| purple cudweed |
Gamochaeta purpurea |
2 |
| purple elephant's-foot |
Elephantopus nudatus |
1 |
| purple fleabane |
Erigeron purpuratus |
7 |
| purple starthistle |
Centaurea calcitrapa |
4 |
| purplestem aster |
Symphyotrichum puniceum |
3 |
| pygmy goldenweed |
Tonestus pygmaeus |
5 |
| pyrethrum |
Chrysanthemum cinerariifolium |
1 |
| ragleaf bahia |
Bahia dissecta |
6 |
| ragweed parthenium |
Parthenium hysterophorus |
4 |
| ragweed sagebrush |
Artemisia franserioides |
1 |
| ragwort |
Senecio spp. |
1 |
| rayless sunflower |
Helianthus radula |
3 |
| redpurple ragwort |
Senecio elegans |
2 |
| rice button aster |
Symphyotrichum dumosum var. dumosum |
1 |
| rockslide yellow fleabane |
Erigeron leiomerus |
10 |
| Rocky Mountain goldenrod |
Solidago multiradiata |
9 |
| Rocky Mountain groundsel |
Packera streptanthifolia |
1 |
| Rocky Mountain zinnia |
Zinnia grandiflora |
2 |
| rockyscree false goldenaster |
Heterotheca fulcrata |
1 |
| romerillo |
Bidens alba |
1 |
| romerillo |
Bidens alba var. radiata |
7 |
| rose rush |
Lygodesmia aphylla |
4 |
| rosering gaillardia |
Gaillardia pulchella |
14 |
| rosy pussytoes |
Antennaria rosea |
6 |
| rough fleabane |
Erigeron strigosus |
7 |
| rough goldenrod |
Solidago rugosa |
5 |
| roundleaf thoroughwort |
Eupatorium rotundifolium |
6 |
| rubber rabbitbrush |
Ericameria nauseosa |
10 |
| rubber rabbitbrush |
Ericameria nauseosa ssp. nauseosa var. nauseosa |
2 |
| running fleabane |
Erigeron colomexicanus |
3 |
| rush skeletonweed |
Chondrilla juncea |
7 |
| Russian knapweed |
Rhaponticum repens |
6 |
| sagebrush |
Artemisia spp. |
1 |
| sand dune thistle |
Cirsium pitcheri |
16 |
| sand sagebrush |
Artemisia filifolia |
3 |
| Santa Cruz tarplant |
Holocarpha macradenia |
8 |
| saw-wort |
Saussurea subacaulis |
15 |
| scabland sagebrush |
Artemisia rigida |
2 |
| scaly blazing star |
Liatris squarrosa |
3 |
| Schweinitz's sunflower |
Helianthus schweinitzii |
2 |
| Scotch thistle |
Onopordum acanthium |
3 |
| seacoast marsh elder |
Iva imbricata |
8 |
| seepwillow |
Baccharis salicifolia |
1 |
| serrate balsamroot |
Balsamorhiza serrata |
1 |
| shaggy fleabane |
Erigeron pumilus |
4 |
| shortleaf blazing star |
Liatris tenuifolia |
1 |
| shortray fleabane |
Erigeron lonchophyllus |
2 |
| showy alpine ragwort |
Senecio amplectens var. amplectens |
1 |
| shrubby daisybush |
Osteospermum fruticosum |
1 |
| shrubland dubautia |
Dubautia linearis |
1 |
| silk-grass |
Pityopsis graminifolia |
19 |
| slender aster |
Symphyotrichum divaricatum |
1 |
| slender cudweed |
Gnaphalium exilifolium |
1 |
| slender hawkweed |
Hieracium gracile |
4 |
| slender woollyheads |
Psilocarphus tenellus |
1 |
| slenderflower thistle |
Carduus tenuiflorus |
2 |
| small palafox |
Palafoxia callosa |
1 |
| small wirelettuce |
Stephanomeria exigua |
6 |
| small-leaf pussytoes |
Antennaria parvifolia |
12 |
| smallflower desert-chicory |
Pyrrhopappus pauciflorus |
12 |
| smallflower galinsoga |
Galinsoga parviflora |
7 |
| smooth blue aster |
Symphyotrichum laeve var. laeve |
3 |
| smooth cat's ear |
Hypochaeris glabra |
7 |
| smooth goldfields |
Lasthenia glaberrima |
3 |
| smooth hawksbeard |
Crepis capillaris |
4 |
| smooth tidytips |
Layia chrysanthemoides |
7 |
| snowy thistle |
Cirsium occidentale var. candidissimum |
1 |
| soft thistle |
Cirsium carolinianum |
1 |
| southern brassbuttons |
Cotula australis |
2 |
| spanishneedles |
Bidens bipinnata |
1 |
| spineless horsebrush |
Tetradymia canescens |
2 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
1 |
| spiny sowthistle |
Sonchus asper |
4 |
| spotted knapweed |
Centaurea stoebe |
5 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
8 |
| sprawling horseweed |
Calyptocarpus vialis |
2 |
| sprucefir fleabane |
Erigeron eximius |
8 |
| squarrose knapweed |
Centaurea virgata |
2 |
| stemless thistle |
Cirsium tioganum |
13 |
| stemless Townsend daisy |
Townsendia exscapa |
1 |
| sticky everlasting |
Bracteantha viscosa |
1 |
| stiff greenthread |
Thelesperma filifolium |
3 |
| stiff tickseed |
Coreopsis palmata |
2 |
| stinking camphorweed |
Pluchea foetida |
9 |
| stinking chamomile |
Anthemis cotula |
6 |
| stinkweed |
Pluchea camphorata |
6 |
| stinkwort |
Dittrichia graveolens |
4 |
| Stokes' aster |
Stokesia laevis |
1 |
| strawflower |
Helichrysum petiolare |
3 |
| streamside fleabane |
Erigeron glabellus |
3 |
| subalpine fleabane |
Erigeron peregrinus |
21 |
| subalpine gumweed |
Grindelia subalpina |
1 |
| Suisun Marsh aster |
Symphyotrichum lentum |
4 |
| sulphur knapweed |
Centaurea sulphurea |
1 |
| sunflower |
Helianthus spp. |
12 |
| sunflower mule-ears |
Wyethia helianthoides |
3 |
| swamp sunflower |
Helianthus angustifolius |
19 |
| sweet joepyeweed |
Eupatorium purpureum |
10 |
| tahoka daisy |
Machaeranthera tanacetifolia |
2 |
| tall blacktip ragwort |
Senecio atratus |
1 |
| tall fleabane |
Conyza floribunda |
1 |
| tall fleabane |
Erigeron elatior |
6 |
| tall groundwel |
Senecio hydrophiloides |
1 |
| tall lettuce |
Lactuca canadensis |
3 |
| tall ragwort |
Senecio serra |
6 |
| tall tickseed |
Coreopsis tripteris |
1 |
| tansy ragwort |
Senecio jacobaea |
8 |
| tarragon |
Artemisia dracunculus |
6 |
| tasselflower brickellbush |
Brickellia grandiflora |
6 |
| telegraphplant |
Heterotheca grandiflora |
7 |
| Texas ironweed |
Vernonia texana |
9 |
| Texas skeletonplant |
Lygodesmia texana |
2 |
| Texas thistle |
Cirsium texanum |
3 |
| Texas yellowstar |
Lindheimera texana |
6 |
| thistle |
Cirsium spp. |
10 |
| threenerve fleabane |
Erigeron subtrinervis |
1 |
| threeray tarweed |
Hemizonia lobbii |
1 |
| Tracy's thistle |
Cirsium undulatum var. tracyi |
1 |
| trailing fleabane |
Erigeron flagellaris |
3 |
| treedaisy |
Montanoa hibiscifolia |
11 |
| tropic ageratum |
Ageratum conyzoides |
1 |
| tropical burnweed |
Erechtites valerianifolius |
1 |
| trumpetweed |
Eupatorium fistulosum |
17 |
| twoflower dwarfdandelion |
Krigia biflora |
1 |
| uplands white goldenrod |
Solidago ptarmicoides |
4 |
| upright prairie coneflower |
Ratibida columnifera |
15 |
| vanillaleaf |
Carphephorus odoratissimus |
12 |
| virgate tarweed |
Holocarpha virgata |
2 |
| Waianae Range nehe |
Lipochaeta tenuifolia |
2 |
| wand goldenrod |
Solidago stricta |
6 |
| wavyleaf purple coneflower |
Echinacea simulata |
2 |
| wavyleaf thistle |
Cirsium undulatum |
4 |
| West Indian beggarticks |
Bidens cynapiifolia |
1 |
| western aster |
Symphyotrichum ascendens |
16 |
| western ironweed |
Vernonia baldwinii |
1 |
| western marsh cudweed |
Gnaphalium palustre |
2 |
| western mountain aster |
Symphyotrichum spathulatum var. spathulatum |
7 |
| western ragweed |
Ambrosia psilostachya |
2 |
| western salsify |
Tragopogon dubius |
6 |
| western thistle |
Cirsium occidentale |
1 |
| white bristle bush |
Metalasia muricata |
2 |
| white hawkweed |
Hieracium albiflorum |
2 |
| white heath aster |
Symphyotrichum ericoides var. ericoides |
1 |
| white panicle aster |
Symphyotrichum lanceolatum |
4 |
| white snakeroot |
Ageratina altissima |
10 |
| white snakeroot |
Ageratina altissima var. altissima |
10 |
| whiteflower leafcup |
Polymnia canadensis |
13 |
| whitestem goldenbush |
Ericameria discoidea |
5 |
| willowleaf lettuce |
Lactuca saligna |
3 |
| wing-stemmed daisy |
Calostephane divaricata |
2 |
| woodland groundsel |
Senecio sylvaticus |
5 |
| woodland sunflower |
Helianthus divaricatus |
10 |
| woody goldenrod |
Chrysoma pauciflosculosa |
16 |
| woolly distaff thistle |
Carthamus lanatus |
2 |
| woolly mule-ears |
Wyethia mollis |
1 |
| woolly ragwort |
Packera tomentosa |
9 |
| woolly sunbonnets |
Chaptalia tomentosa |
16 |
| Wooton's ragwort |
Senecio wootonii |
2 |
| wreath goldenrod |
Solidago caesia |
4 |
| Wyoming Townsend daisy |
Townsendia alpigena var. alpigena |
1 |
| yarrow |
Achillea spp. |
1 |
| yellow chamomile |
Anthemis tinctoria |
2 |
| yellow lanceleaf blanketflower |
Gaillardia aestivalis var. flavovirens |
2 |
| yellow oxeye |
Telekia speciosa |
2 |
| yellow starthistle |
Centaurea solstitialis |
8 |
| yellow thistle |
Cirsium horridulum |
9 |
| yellowspine thistle |
Cirsium ochrocentrum |
2 |
| zigzag goldenrod |
Solidago flexicaulis |
10 |
