| 'ena'ena |
Pseudognaphalium sandwicensium |
3 |
| absinth wormwood |
Artemisia absinthium |
1 |
| African mile-a-minute |
Mikania cordata |
1 |
| Aleutian wormwood |
Artemisia aleutica |
6 |
| alpine knapweed |
Centaurea nigrescens |
2 |
| alpine leafybract aster |
Symphyotrichum foliaceum var. apricum |
1 |
| alpine sagewort |
Artemisia norvegica |
6 |
| American burnweed |
Erechtites hieraciifolius |
4 |
| American everlasting |
Gamochaeta americana |
1 |
| American star-thistle |
Centaurea americana |
1 |
| annual bursage |
Ambrosia acanthicarpa |
3 |
| annual ragweed |
Ambrosia artemisiifolia var. elatior |
1 |
| annual sowthistle |
Sonchus oleraceus |
11 |
| arctic alpine fleabane |
Erigeron humilis |
11 |
| arctic aster |
Eurybia sibirica |
15 |
| arctic daisy |
Chrysanthemum arcticum |
13 |
| 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 |
1 |
| arrowleaf ragwort |
Senecio triangularis |
4 |
| aster |
Aster spp. |
2 |
| Aster |
|
1 |
| Australian burnweed |
Erechtites minimus |
2 |
| bahia |
Bahia spp. |
2 |
| bashful ragwort |
Senecio pudicus |
8 |
| Bay Biscayne creeping-oxeye |
Sphagneticola trilobata |
4 |
| biennial wormwood |
Artemisia biennis |
2 |
| big sagebrush |
Artemisia tridentata |
3 |
| billy buttons |
Pycnosorus globosus |
2 |
| bitter lettuce |
Lactuca virosa |
4 |
| bitter sneezeweed |
Helenium amarum |
4 |
| black knapweed |
Centaurea nigra |
3 |
| black-eyed susan |
Rudbeckia hirta |
8 |
| blackhead fleabane |
Erigeron melanocephalus |
4 |
| blanket-flower |
Gaillardia x grandiflora |
2 |
| blanketflower |
Gaillardia aristata |
15 |
| blanketflower |
Gaillardia spp. |
2 |
| blazing star |
Liatris spp. |
1 |
| blessed milkthistle |
Silybum marianum |
15 |
| blessed thistle |
Cnicus benedictus |
2 |
| blow wives |
Achyrachaena mollis |
11 |
| blue lettuce |
Lactuca tatarica var. pulchella |
2 |
| blue mistflower |
Conoclinium coelestinum |
10 |
| boreal sagebrush |
Artemisia borealis |
10 |
| brassbuttons |
Cotula coronopifolia |
4 |
| bristly hawksbeard |
Crepis setosa |
1 |
| bristly oxtongue |
Helminthotheca echioides |
3 |
| British yellowhead |
Inula britannica |
4 |
| broadleaf arnica |
Arnica latifolia |
1 |
| broom snakeweed |
Gutierrezia sarothrae |
3 |
| broomlike ragwort |
Senecio spartioides var. spartioides |
6 |
| brown knapweed |
Centaurea jacea |
3 |
| bull cottonthistle |
Onopordum tauricum |
2 |
| bull thistle |
Cirsium vulgare |
35 |
| bur beggarticks |
Bidens tripartita |
2 |
| burmarigold |
Bidens laevis |
12 |
| Cainville thistle |
Cirsium calcareum |
1 |
| California goldfields |
Lasthenia californica |
13 |
| California mugwort |
Artemisia douglasiana |
2 |
| camphorweed |
Pluchea fosbergii |
1 |
| Canada goldenrod |
Solidago canadensis |
11 |
| Canada thistle |
Cirsium arvense |
91 |
| Canadian horseweed |
Conyza canadensis var. pusilla |
1 |
| cape ivy |
Delairea odorata |
9 |
| capeweed |
Arctotheca calendula |
4 |
| cardoon |
Cynara cardunculus |
2 |
| cat's ear |
Hypochaeris spp. |
1 |
| Chamisso arnica |
Arnica chamissonis |
2 |
| chicory |
Cichorium intybus |
11 |
| China aster |
Callistephus chinensis Matsumoto series |
2 |
| clasping coneflower |
Dracopis amplexicaulis |
1 |
| climbing aster |
Ampelaster carolinianus |
17 |
| climbing hempweed |
Mikania scandens |
1 |
| clusterflower |
Flaveria trinervia |
3 |
| coastal nehe |
Lipochaeta lavarum |
9 |
| coastal plain honeycombhead |
Balduina angustifolia |
6 |
| coat buttons |
Tridax procumbens |
10 |
| Colorado ragwort |
Senecio soldanella |
7 |
| coltsfoot |
Tussilago farfara |
56 |
| common brighteyes |
Reichardia picroides |
6 |
| common burdock |
Arctium minus |
7 |
| common cocklebur |
Xanthium strumarium |
27 |
| common crupina |
Crupina vulgaris |
7 |
| common groundsel |
Senecio vulgaris |
7 |
| common ragweed |
Ambrosia artemisiifolia |
16 |
| common salsify |
Tragopogon porrifolius |
3 |
| common sneezeweed |
Helenium autumnale |
1 |
| common stickyseed |
Blennosperma nanum |
6 |
| common sunflower |
Helianthus annuus |
19 |
| common tansy |
Tanacetum vulgare |
21 |
| common tarweed |
Centromadia pungens ssp. pungens |
6 |
| common yarrow |
Achillea millefolium |
19 |
| coneflower |
Rudbeckia hirta cv. Cherokee Sunset |
1 |
| coneflower |
Rudbeckia hirta cv. Indian Summer |
4 |
| coneflower |
Rudbeckia hirta cv. Irish Eyes |
2 |
| coneflowers |
Echinacea spp. |
2 |
| corn chamomile |
Anthemis arvensis |
2 |
| cosmos |
Cosmos spp. |
1 |
| cottonbatting plant |
Pseudognaphalium stramineum |
1 |
| Coulter's horseweed |
Laennecia coulteri |
1 |
| creeping croftonweed |
Ageratina riparia |
4 |
| croftonweed |
Ageratina adenophora |
12 |
| crownbeard |
Verbesina encelioides |
16 |
| crupina |
Crupina crupinastrum |
1 |
| cudweed |
Gnaphalium spp. |
1 |
| cup rosinweed |
Silphium perfoliatum |
46 |
| Cupid's-shaving-brush |
Emilia fosbergii |
3 |
| cure for all |
Pluchea carolinensis |
7 |
| curlycup gumweed |
Grindelia squarrosa |
7 |
| curlycup gumweed |
Grindelia squarrosa var. serrulata |
4 |
| cutleaf burnweed |
Erechtites glomeratus |
2 |
| cutleaf coneflower |
Rudbeckia laciniata |
9 |
| cutleaf coneflower |
Rudbeckia laciniata var. ampla |
1 |
| dandelion |
Taraxacum officinale |
12 |
| dense blazing star |
Liatris spicata |
1 |
| devils beggarticks |
Bidens frondosa |
4 |
| diffuse knapweed |
Centaurea diffusa |
10 |
| dogfennel |
Eupatorium capillifolium |
4 |
| Douglas' dustymaiden |
Chaenactis douglasii |
1 |
| Douglas' silverpuffs |
Microseris douglasii |
4 |
| dubautia |
Dubautia spp. |
4 |
| dune tetramolopium |
Tetramolopium rockii |
5 |
| dwarf mountain ragwort |
Senecio fremontii |
5 |
| eastern baccharis |
Baccharis halimifolia |
3 |
| eclipta |
Eclipta prostrata |
1 |
| elephantsfoot |
Elephantopus tomentosus |
2 |
| Engelmann's aster |
Eucephalus engelmannii |
2 |
| English daisy |
Bellis perennis |
2 |
| false chamomile |
Tripleurospermum perforatum |
5 |
| false mayweed |
Tripleurospermum maritimum |
9 |
| featherleaf fleabane |
Erigeron pinnatisectus |
6 |
| Fendler's groundsel |
Packera fendleri |
1 |
| fernleaf yarrow |
Achillea filipendulina |
1 |
| feverfew |
Tanacetum parthenium |
7 |
| field marigold |
Calendula arvensis |
2 |
| Fitch's tarweed |
Hemizonia fitchii |
17 |
| fivenerve helianthella |
Helianthella quinquenervis |
5 |
| Florida wild lettuce |
Lactuca floridana |
2 |
| Fremont's goldfields |
Lasthenia fremontii |
4 |
| fuscate groundsel |
Tephroseris lindstroemii |
3 |
| Georgia aster |
Symphyotrichum georgianum |
3 |
| giant ragweed |
Ambrosia trifida |
15 |
| giant sumpweed |
Cyclachaena xanthifolia |
10 |
| glandular Cape marigold |
Dimorphotheca sinuata |
2 |
| goatsbeard |
Tragopogon spp. |
1 |
| goldenrod |
Solidago spp. (hybrid) |
3 |
| goldenrod |
Solidago spp. |
1 |
| goldfields |
Lasthenia spp. |
3 |
| grassleaf Barbara's buttons |
Marshallia graminifolia var. cynanthera |
4 |
| graygreen thistle |
Cirsium canovirens |
2 |
| graylocks four-nerve daisy |
Tetraneuris grandiflora |
10 |
| Great Valley gumweed |
Grindelia camporum |
8 |
| Great Valley gumweed |
Grindelia camporum var. camporum |
1 |
| groundsel |
Tephroseris frigida |
5 |
| groundsel |
Tephroseris spp. |
7 |
| gumweed |
Grindelia spp. |
2 |
| hairy beggarticks |
Bidens pilosa |
8 |
| hairy cat's ear |
Hypochaeris radicata |
9 |
| hairy chaffhead |
Carphephorus paniculatus |
1 |
| hairy false goldenaster |
Heterotheca villosa |
12 |
| hairy fleabane |
Conyza bonariensis |
1 |
| hairy galinsoga |
Galinsoga ciliata |
2 |
| hairy galinsoga |
Galinsoga quadriradiata |
2 |
| hairyseed bahia |
Bahia absinthifolia |
1 |
| Haleakala tetramolopium |
Tetramolopium humile ssp. haleakalae |
7 |
| Hana Forest silversword |
Argyroxiphium grayanum |
1 |
| Hawai'i silversword |
Argyroxiphium sandwicense ssp. macrocephalum |
117 |
| Hawai'i silversword |
Argyroxiphium sandwicense ssp. sandwicense |
3 |
| hawkweeds |
Hieracium spp. |
2 |
| hempvine |
Mikania spp. |
1 |
| hoary Townsend daisy |
Townsendia incana |
2 |
| Holm's ragwort |
Senecio amplectens var. holmii |
4 |
| horned dandelion |
Taraxacum ceratophorum |
7 |
| horseweed |
Conyza canadensis |
17 |
| Iberian knapweed |
Centaurea pullata |
2 |
| iliau |
Wilkesia gymnoxiphium |
1 |
| Indian camphorweed |
Pluchea indica |
4 |
| Indian thistle |
Cirsium edule |
3 |
| Italian hawksbeard |
Crepis bursifolia |
2 |
| Italian plumeless thistle |
Carduus pycnocephalus |
7 |
| Jackson Hole thistle |
Cirsium subniveum |
2 |
| Japanese thistle |
Cirsium japonicum |
1 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
9 |
| Jerusalem artichoke |
Helianthus tuberosus |
9 |
| Kalealaha beggarticks |
Bidens micrantha ssp. kalealaha |
1 |
| kau silversword |
Argyroxiphium kauense |
1 |
| Kellogg's tarweed |
Deinandra kelloggii |
1 |
| knapweeds |
Centaurea spp. |
1 |
| Kure Atoll nehe |
Lipochaeta integrifolia |
19 |
| lanceleaf tickseed |
Coreopsis lanceolata |
10 |
| Latin American fleabane |
Erigeron karvinskianus |
5 |
| lawn burweed |
Soliva sessilis |
2 |
| leopard plant |
Ligularia stenocephala |
1 |
| lesser hawkbit |
Leontodon taraxacoides |
2 |
| Louisiana wormwood |
Artemisia ludoviciana |
5 |
| Madagascar ragwort |
Senecio madagascariensis |
13 |
| Malta starthistle |
Centaurea melitensis |
8 |
| marigold |
Tagetes spp. |
2 |
| marsh fleabane |
Senecio congestus |
2 |
| Maui beggarticks |
Bidens mauiensis |
1 |
| Maui wormwood |
Artemisia mauiensis |
5 |
| Mauna Kea dubautia |
Dubautia arborea |
8 |
| Mauna Loa beggarticks |
Bidens menziesii |
3 |
| Mauna Loa beggarticks |
Bidens menziesii ssp. filiformis |
3 |
| Maximilian sunflower |
Helianthus maximiliani |
1 |
| meadow hawkweed |
Hieracium caespitosum |
5 |
| meadow knapweed |
Centaurea moncktonii |
5 |
| meadow salsify |
Tragopogon lamottei |
3 |
| Mexican brassbuttons |
Cotula mexicana |
1 |
| Mexican flamevine |
Pseudogynoxys chenopodioides |
2 |
| michaelmas daisy |
Aster ericoides cv. Monte Casino |
3 |
| Missouri goldenrod |
Solidago missouriensis |
6 |
| mountain big sagebrush |
Artemisia tridentata ssp. vaseyana |
3 |
| mountain dubautia |
Dubautia menziesii |
47 |
| Mt. Albert goldenrod |
Solidago simplex |
11 |
| mule-ears |
Wyethia amplexicaulis |
6 |
| musk thistle |
Carduus nutans |
31 |
| narrowleaf arnica |
Arnica angustifolia |
1 |
| narrowleaf saw-wort |
Saussurea angustifolia |
4 |
| nehe |
Lipochaeta spp. |
2 |
| New England aster |
Symphyotrichum novae-angliae |
5 |
| New York ironweed |
Vernonia noveboracensis |
6 |
| Newberry's hymenopappus |
Hymenopappus newberryi |
13 |
| North African knapweed |
Centaurea diluta |
1 |
| northern dandelion |
Taraxacum phymatocarpum |
15 |
| Nuttall's sunflower |
Helianthus nuttallii |
5 |
| Oahu wormwood |
Artemisia australis |
1 |
| onestem fleabane |
Erigeron simplex |
12 |
| Ontario blazing star |
Liatris cylindracea |
2 |
| Ontario goldenrod |
Solidago simplex ssp. randii var. ontarioensis |
1 |
| orange agoseris |
Agoseris aurantiaca |
7 |
| orange coneflower |
Rudbeckia fulgida |
1 |
| orange hawkweed |
Hieracium aurantiacum |
12 |
| orange sneezeweed |
Hymenoxys hoopesii |
11 |
| Oregon fleabane |
Erigeron speciosus |
8 |
| Oregon woollyheads |
Psilocarphus oregonus |
2 |
| oxeye |
Heliopsis helianthoides |
3 |
| oxeye daisy |
Leucanthemum vulgare |
23 |
| pale agoseris |
Agoseris glauca |
9 |
| pale echinacea |
Echinacea pallida |
1 |
| pappose tarweed |
Centromadia parryi ssp. rudis |
3 |
| Parry's goldenrod |
Oreochrysum parryi |
9 |
| pearly everlasting |
Anaphalis margaritacea |
4 |
| pearly pussytoes |
Antennaria anaphaloides |
6 |
| peregrine thistle |
Cirsium cymosum |
1 |
| perennial cornflower |
Centaurea montana |
2 |
| perennial sowthistle |
Sonchus arvensis |
10 |
| Peruvian zinnia |
Zinnia peruviana |
4 |
| pestilence wort |
Petasites hybridus |
3 |
| pineapple-weed |
Matricaria discoidea |
4 |
| pingue rubberweed |
Hymenoxys richardsonii |
11 |
| pink bogbutton |
Sclerolepis uniflora |
4 |
| plains coreopsis |
Coreopsis tinctoria |
1 |
| plantainleaf pussytoes |
Antennaria plantaginifolia |
2 |
| pot marigold |
Calendula officinalis |
4 |
| poverty sumpweed |
Iva axillaris |
3 |
| prairie sagewort |
Artemisia frigida |
1 |
| prickly lettuce |
Lactuca serriola |
32 |
| purple coneflower |
Echinacea purpurea |
6 |
| purple cudweed |
Gamochaeta purpurea |
1 |
| purple fleabane |
Erigeron purpuratus |
10 |
| purple starthistle |
Centaurea calcitrapa |
5 |
| pygmy goldenweed |
Tonestus pygmaeus |
9 |
| pygmy pussytoes |
Antennaria monocephala |
1 |
| ragweed parthenium |
Parthenium hysterophorus |
5 |
| ragwort |
Senecio spp. |
1 |
| rayless sunflower |
Helianthus radula |
5 |
| red dahlia |
Dahlia coccinea |
1 |
| redpurple ragwort |
Senecio elegans |
2 |
| Rocky Mountain goldenrod |
Solidago multiradiata |
29 |
| romerillo |
Bidens alba |
1 |
| romerillo |
Bidens alba var. radiata |
5 |
| rose rush |
Lygodesmia aphylla |
5 |
| rosering gaillardia |
Gaillardia pulchella |
5 |
| rosy pussytoes |
Antennaria rosea |
2 |
| running fleabane |
Erigeron colomexicanus |
1 |
| rush skeletonweed |
Chondrilla juncea |
11 |
| Russian knapweed |
Rhaponticum repens |
10 |
| safflower |
Carthamus tinctorius |
3 |
| sagebrush |
Artemisia spp. |
3 |
| Santa Cruz tarplant |
Holocarpha macradenia |
8 |
| saw-wort |
Saussurea subacaulis |
21 |
| scaly blazing star |
Liatris squarrosa |
4 |
| Schweinitz's sunflower |
Helianthus schweinitzii |
1 |
| Scotch thistle |
Onopordum acanthium |
27 |
| shaggy fleabane |
Erigeron pumilus |
2 |
| Shasta daisy |
Leucanthemum x superbum |
2 |
| shortray fleabane |
Erigeron lonchophyllus |
4 |
| shrubby daisybush |
Osteospermum fruticosum |
1 |
| shrubland dubautia |
Dubautia linearis |
1 |
| slender aster |
Symphyotrichum divaricatum |
1 |
| slender hawkweed |
Hieracium gracile |
7 |
| slender woollyheads |
Psilocarphus tenellus |
1 |
| slenderflower thistle |
Carduus tenuiflorus |
1 |
| small wirelettuce |
Stephanomeria exigua |
6 |
| small-leaf pussytoes |
Antennaria parvifolia |
3 |
| smallflower galinsoga |
Galinsoga parviflora |
4 |
| smooth cat's ear |
Hypochaeris glabra |
9 |
| smooth goldfields |
Lasthenia glaberrima |
4 |
| smooth hawksbeard |
Crepis capillaris |
5 |
| smooth oxeye |
Heliopsis helianthoides var. scabra |
1 |
| smooth tidytips |
Layia chrysanthemoides |
10 |
| snowy thistle |
Cirsium occidentale var. candidissimum |
1 |
| southern brassbuttons |
Cotula australis |
3 |
| southern globethistle |
Echinops ritro |
1 |
| spineless horsebrush |
Tetradymia canescens |
5 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
1 |
| spiny sowthistle |
Sonchus asper |
8 |
| spotted knapweed |
Centaurea stoebe |
116 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
17 |
| squarrose knapweed |
Centaurea virgata |
2 |
| stiff greenthread |
Thelesperma filifolium |
1 |
| stinking chamomile |
Anthemis cotula |
8 |
| stinkwort |
Dittrichia graveolens |
4 |
| strawflower |
Helichrysum petiolare |
3 |
| Suisun Marsh aster |
Symphyotrichum lentum |
7 |
| sulphur knapweed |
Centaurea sulphurea |
1 |
| sunflower |
Helianthus annuus cultivar |
1 |
| sunflower |
Helianthus annuus cv. Teddy Bear |
1 |
| sunflower |
Helianthus spp. |
4 |
| swamp sunflower |
Helianthus angustifolius |
2 |
| sweetscented marigold |
Tagetes lucida |
1 |
| tall fleabane |
Conyza floribunda |
1 |
| tall ironweed |
Vernonia angustifolia |
2 |
| tall ironweed |
Vernonia gigantea |
2 |
| tall lettuce |
Lactuca canadensis |
6 |
| tall ragwort |
Senecio serra |
6 |
| tansy |
Tanacetum spp. |
2 |
| tansy ragwort |
Senecio jacobaea |
107 |
| tasselflower brickellbush |
Brickellia grandiflora |
1 |
| telegraphplant |
Heterotheca grandiflora |
7 |
| Texas ironweed |
Vernonia texana |
3 |
| Texas skeletonplant |
Lygodesmia texana |
1 |
| Texas thistle |
Cirsium texanum |
1 |
| Texas yellowstar |
Lindheimera texana |
2 |
| thistle |
Cirsium spp. |
15 |
| threeray tarweed |
Hemizonia lobbii |
1 |
| Transvaal daisy |
Gerbera spp. |
1 |
| treedaisy |
Montanoa hibiscifolia |
11 |
| tropic ageratum |
Ageratum conyzoides |
1 |
| trumpetweed |
Eupatorium fistulosum |
1 |
| umber pussytoes |
Antennaria umbrinella |
1 |
| upright prairie coneflower |
Ratibida columnifera |
3 |
| virgate tarweed |
Holocarpha virgata |
2 |
| wall lettuce |
Mycelis muralis |
67 |
| wavyleaf thistle |
Cirsium undulatum |
5 |
| West Indian beggarticks |
Bidens cynapiifolia |
1 |
| western aster |
Symphyotrichum ascendens |
3 |
| western marsh cudweed |
Gnaphalium palustre |
3 |
| western ragweed |
Ambrosia psilostachya |
2 |
| western salsify |
Tragopogon dubius |
6 |
| western thistle |
Cirsium occidentale |
2 |
| white hawkweed |
Hieracium albiflorum |
5 |
| white snakeroot |
Ageratina altissima |
3 |
| whiteflower leafcup |
Polymnia canadensis |
3 |
| whorled coreopsis |
Coreopsis verticillata |
1 |
| wild safflower |
Carthamus oxyacanthus |
1 |
| willowleaf lettuce |
Lactuca saligna |
3 |
| woodland groundsel |
Senecio sylvaticus |
6 |
| woody goldenrod |
Chrysoma pauciflosculosa |
2 |
| woolly distaff thistle |
Carthamus lanatus |
2 |
| woolly ragwort |
Packera tomentosa |
3 |
| woolly sunbonnets |
Chaptalia tomentosa |
8 |
| woollyheads |
Psilocarphus spp. |
1 |
| yarrow |
Achillea aegyptiaca |
2 |
| yarrow |
Achillea spp. |
1 |
| yellow chamomile |
Anthemis tinctoria |
3 |
| yellow starthistle |
Centaurea solstitialis |
15 |
| yellow thistle |
Cirsium horridulum |
5 |
| yellowspine thistle |
Cirsium ochrocentrum |
3 |
