| 'ena'ena |
Pseudognaphalium sandwicensium var. molokaiense |
3 |
| absinth wormwood |
Artemisia absinthium |
3 |
| Aleutian wormwood |
Artemisia aleutica |
1 |
| alkalai marsh aster |
Almutaster pauciflorus |
1 |
| alpine leafybract aster |
Symphyotrichum foliaceum var. foliaceum |
2 |
| alpine sagebrush |
Artemisia scopulorum |
1 |
| alpine sagewort |
Artemisia norvegica |
1 |
| American burnweed |
Erechtites hieraciifolius |
2 |
| American everlasting |
Gamochaeta americana |
1 |
| annual bursage |
Ambrosia acanthicarpa |
1 |
| annual fleabane |
Erigeron annuus |
5 |
| annual ragweed |
Ambrosia artemisiifolia var. elatior |
2 |
| annual sowthistle |
Sonchus oleraceus |
7 |
| arctic alpine fleabane |
Erigeron humilis |
2 |
| arctic daisy |
Chrysanthemum arcticum |
2 |
| arctic groundsel |
Tephroseris atropurpurea |
1 |
| arctic sweet coltsfoot |
Petasites frigidus |
3 |
| arctic wormwood |
Artemisia senjavinensis |
1 |
| artichoke |
Cynara scolymus |
1 |
| Asiatic hawksbeard |
Youngia japonica |
1 |
| aster |
Symphyotrichum spp. |
4 |
| bahia |
Bahia spp. |
1 |
| balsam groundsel |
Packera paupercula |
1 |
| Bay Biscayne creeping-oxeye |
Sphagneticola trilobata |
2 |
| beautiful fleabane |
Erigeron formosissimus |
2 |
| biennial wormwood |
Artemisia biennis |
1 |
| big sagebrush |
Artemisia tridentata |
3 |
| bitter fleabane |
Erigeron acris |
2 |
| bitter lettuce |
Lactuca virosa |
2 |
| bitter sneezeweed |
Helenium amarum |
2 |
| blanket-flower |
Gaillardia x grandiflora |
1 |
| blanketflower |
Gaillardia aristata |
2 |
| blessed milkthistle |
Silybum marianum |
4 |
| blue lettuce |
Lactuca tatarica var. pulchella |
2 |
| blue mistflower |
Conoclinium coelestinum |
4 |
| bluemink |
Ageratum houstonianum |
1 |
| bog goldenrod |
Solidago uliginosa |
2 |
| boneset |
Eupatorium perfoliatum |
6 |
| boreal sagebrush |
Artemisia borealis |
5 |
| bristly oxtongue |
Helminthotheca echioides |
1 |
| broadleaf arnica |
Arnica latifolia |
7 |
| broom snakeweed |
Gutierrezia sarothrae |
1 |
| broomlike ragwort |
Senecio spartioides var. spartioides |
3 |
| brown knapweed |
Centaurea jacea |
4 |
| bull cottonthistle |
Onopordum tauricum |
1 |
| bull thistle |
Cirsium vulgare |
27 |
| burmarigold |
Bidens laevis |
2 |
| Cainville thistle |
Cirsium calcareum |
2 |
| California goldfields |
Lasthenia californica |
2 |
| California mugwort |
Artemisia douglasiana |
1 |
| camphorweed |
Heterotheca subaxillaris |
1 |
| Canada goldenrod |
Solidago canadensis |
6 |
| Canada goldenrod |
Solidago canadensis var. scabra |
4 |
| Canada thistle |
Cirsium arvense |
37 |
| cape ivy |
Delairea odorata |
2 |
| Carolina falsedandelion |
Pyrrhopappus carolinianus |
1 |
| Chamisso arnica |
Arnica chamissonis |
2 |
| chicory |
Cichorium intybus |
15 |
| climbing aster |
Ampelaster carolinianus |
3 |
| climbing hempweed |
Mikania scandens |
6 |
| coastal nehe |
Lipochaeta lavarum |
3 |
| coastal plain honeycombhead |
Balduina angustifolia |
3 |
| coat buttons |
Tridax procumbens |
2 |
| coltsfoot |
Tussilago farfara |
18 |
| common burdock |
Arctium minus |
9 |
| common cocklebur |
Xanthium strumarium |
15 |
| common crupina |
Crupina vulgaris |
2 |
| common groundsel |
Senecio vulgaris |
4 |
| common ragweed |
Ambrosia artemisiifolia |
7 |
| common sunflower |
Helianthus annuus |
4 |
| common tansy |
Tanacetum vulgare |
5 |
| common tarweed |
Centromadia pungens ssp. pungens |
1 |
| common yarrow |
Achillea millefolium |
16 |
| coneflower |
Rudbeckia hirta cv. Indian Summer |
1 |
| cottony goldenaster |
Chrysopsis gossypina ssp. cruiseana |
5 |
| Coulter's horseweed |
Laennecia coulteri |
1 |
| croftonweed |
Ageratina adenophora |
1 |
| crownbeard |
Verbesina encelioides |
1 |
| cudweed |
Gnaphalium spp. |
2 |
| cup rosinweed |
Silphium perfoliatum |
8 |
| Cupid's-shaving-brush |
Emilia fosbergii |
5 |
| cure for all |
Pluchea carolinensis |
7 |
| curlycup gumweed |
Grindelia squarrosa |
3 |
| curlycup gumweed |
Grindelia squarrosa var. serrulata |
1 |
| cutleaf daisy |
Erigeron compositus |
3 |
| dandelion |
Taraxacum officinale |
13 |
| dandelion |
Taraxacum spp. |
2 |
| devils beggarticks |
Bidens frondosa |
2 |
| diffuse knapweed |
Centaurea diffusa |
1 |
| dogfennel |
Eupatorium capillifolium |
4 |
| Douglas' dustymaiden |
Chaenactis douglasii |
2 |
| Douglas' silverpuffs |
Microseris douglasii |
1 |
| dubautia |
Dubautia spp. |
2 |
| dusty miller |
Centaurea cineraria |
1 |
| dwarf mountain ragwort |
Senecio fremontii |
1 |
| early goldenrod |
Solidago juncea |
1 |
| eastern baccharis |
Baccharis halimifolia |
19 |
| eastern fournerved daisy |
Tetraneuris herbacea |
2 |
| Eaton's fleabane |
Erigeron eatonii |
2 |
| eclipta |
Eclipta prostrata |
2 |
| elephantsfoot |
Elephantopus spp. |
1 |
| fall hawkbit |
Leontodon autumnalis |
1 |
| false chamomile |
Tripleurospermum perforatum |
3 |
| feverfew |
Tanacetum parthenium |
1 |
| fewflower blazing star |
Liatris pauciflora |
1 |
| field thistle |
Cirsium discolor |
1 |
| Fitch's tarweed |
Hemizonia fitchii |
5 |
| flat-top goldentop |
Euthamia graminifolia var. graminifolia |
3 |
| Fremont's goldfields |
Lasthenia fremontii |
1 |
| fuscate groundsel |
Tephroseris lindstroemii |
1 |
| Georgia aster |
Symphyotrichum georgianum |
5 |
| giant goldenrod |
Solidago gigantea |
2 |
| giant ironweed |
Vernonia gigantea gigantea |
5 |
| giant ragweed |
Ambrosia trifida |
12 |
| goatsbeard |
Tragopogon spp. |
1 |
| Godfrey's blazing star |
Liatris provincialis |
1 |
| goldenrod |
Solidago spp. |
4 |
| goldenweed |
Croptilon divaricatum |
1 |
| grassleaf Barbara's buttons |
Marshallia graminifolia var. cynanthera |
1 |
| gray goldenrod |
Solidago nemoralis |
1 |
| great burdock |
Arctium lappa |
1 |
| great coneflower |
Rudbeckia maxima |
6 |
| Great Valley gumweed |
Grindelia camporum |
1 |
| groundsel |
Tephroseris frigida |
1 |
| groundsel |
Tephroseris spp. |
1 |
| hairy cat's ear |
Hypochaeris radicata |
14 |
| hairy chaffhead |
Carphephorus paniculatus |
5 |
| hairy false goldenaster |
Heterotheca villosa |
1 |
| hairy fleabane |
Conyza bonariensis |
1 |
| hairy galinsoga |
Galinsoga ciliata |
3 |
| hairy goldenrod |
Solidago hispida |
1 |
| hairy sunflower |
Helianthus hirsutus |
1 |
| hairy white oldfield aster |
Symphyotrichum pilosum var. pilosum |
1 |
| Hawai'i silversword |
Argyroxiphium sandwicense ssp. macrocephalum |
8 |
| hawkweeds |
Hieracium spp. |
3 |
| heartleaf arnica |
Arnica cordifolia |
2 |
| Hill's thistle |
Cirsium hillii |
1 |
| Holm's ragwort |
Senecio amplectens var. holmii |
1 |
| horned dandelion |
Taraxacum ceratophorum |
2 |
| horseweed |
Conyza canadensis |
10 |
| Indian camphorweed |
Pluchea indica |
1 |
| Italian hawksbeard |
Crepis bursifolia |
1 |
| Italian plumeless thistle |
Carduus pycnocephalus |
2 |
| Jerusalem artichoke |
Helianthus tuberosus |
4 |
| Kalealaha beggarticks |
Bidens micrantha ssp. kalealaha |
1 |
| kidneyleaf rosinweed |
Silphium compositum |
5 |
| knapweeds |
Centaurea spp. |
1 |
| Kure Atoll nehe |
Lipochaeta integrifolia |
4 |
| lanceleaf blanketflower |
Gaillardia aestivalis |
1 |
| lanceleaf tickseed |
Coreopsis lanceolata |
2 |
| large mountain fleabane |
Erigeron coulteri |
3 |
| limestone hawksbeard |
Crepis intermedia |
1 |
| Louisiana wormwood |
Artemisia ludoviciana |
6 |
| Madagascar ragwort |
Senecio madagascariensis |
2 |
| Malta starthistle |
Centaurea melitensis |
1 |
| Maui wormwood |
Artemisia mauiensis |
1 |
| Mauna Kea dubautia |
Dubautia arborea |
2 |
| Mauna Loa beggarticks |
Bidens menziesii |
1 |
| mayweed |
Tripleurospermum maritimum ssp. inodorum |
1 |
| meadow thistle |
Cirsium scariosum |
1 |
| Michaux's wormwood |
Artemisia michauxiana |
2 |
| Missouri goldenrod |
Solidago missouriensis |
2 |
| mountain dubautia |
Dubautia menziesii |
8 |
| mountain thistle |
Cirsium scopulorum |
3 |
| Mt. Albert goldenrod |
Solidago simplex |
5 |
| mugwort |
Artemisia vulgaris |
7 |
| musk thistle |
Carduus nutans |
14 |
| narrowleaf goldenrod |
Euthamia graminifolia |
2 |
| narrowleaf saw-wort |
Saussurea angustifolia |
1 |
| nehe |
Lipochaeta spp. |
1 |
| New Mexico thistle |
Cirsium neomexicanum |
1 |
| New York ironweed |
Vernonia noveboracensis |
4 |
| nodding beggarticks |
Bidens cernua |
2 |
| northern dandelion |
Taraxacum phymatocarpum |
2 |
| onestem fleabane |
Erigeron simplex |
1 |
| Ontario goldenrod |
Solidago simplex ssp. randii var. ontarioensis |
2 |
| orange hawkweed |
Hieracium aurantiacum |
2 |
| oxeye daisy |
Leucanthemum vulgare |
12 |
| Pacific aster |
Symphyotrichum chilense |
1 |
| paleleaf woodland sunflower |
Helianthus strumosus |
2 |
| parasol whitetop |
Doellingeria umbellata var. umbellata |
1 |
| Parry's arnica |
Arnica parryi |
1 |
| Parry's goldenrod |
Oreochrysum parryi |
3 |
| pearly pussytoes |
Antennaria anaphaloides |
4 |
| perennial sowthistle |
Sonchus arvensis |
7 |
| pineapple-weed |
Matricaria discoidea |
3 |
| pingue rubberweed |
Hymenoxys richardsonii |
3 |
| pink bogbutton |
Sclerolepis uniflora |
3 |
| plantainleaf pussytoes |
Antennaria plantaginifolia |
5 |
| prairie sagewort |
Artemisia frigida |
1 |
| prickly lettuce |
Lactuca serriola |
30 |
| purple starthistle |
Centaurea calcitrapa |
1 |
| pygmy goldenweed |
Tonestus pygmaeus |
1 |
| ragleaf bahia |
Bahia dissecta |
1 |
| ragweed sagebrush |
Artemisia franserioides |
1 |
| rayless sunflower |
Helianthus radula |
2 |
| rockslide yellow fleabane |
Erigeron leiomerus |
1 |
| Rocky Mountain goldenrod |
Solidago multiradiata |
11 |
| romaine lettuce |
Lactuca sativa var. longifolia |
1 |
| romerillo |
Bidens alba var. radiata |
1 |
| rough fleabane |
Erigeron strigosus |
3 |
| rough goldenrod |
Solidago rugosa |
4 |
| roundleaf thoroughwort |
Eupatorium rotundifolium |
1 |
| rubber rabbitbrush |
Ericameria nauseosa |
3 |
| running fleabane |
Erigeron colomexicanus |
1 |
| rush skeletonweed |
Chondrilla juncea |
1 |
| Russian knapweed |
Rhaponticum repens |
4 |
| safflower |
Carthamus tinctorius |
1 |
| sagebrush |
Artemisia spp. |
2 |
| sand dune thistle |
Cirsium pitcheri |
10 |
| sand sagebrush |
Artemisia filifolia |
1 |
| saw-wort |
Saussurea subacaulis |
4 |
| scaly blazing star |
Liatris squarrosa |
2 |
| Scotch thistle |
Onopordum acanthium |
6 |
| seacoast marsh elder |
Iva imbricata |
2 |
| Senegal tea plant |
Gymnocoronis spilanthoides |
1 |
| shortleaf blazing star |
Liatris tenuifolia |
3 |
| shortray fleabane |
Erigeron lonchophyllus |
1 |
| silk-grass |
Pityopsis graminifolia |
5 |
| slender hawkweed |
Hieracium gracile |
2 |
| smallflower galinsoga |
Galinsoga parviflora |
2 |
| smooth cat's ear |
Hypochaeris glabra |
1 |
| smooth hawksbeard |
Crepis capillaris |
1 |
| snowy thistle |
Cirsium occidentale var. candidissimum |
1 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
2 |
| spiny sowthistle |
Sonchus asper |
11 |
| spotted knapweed |
Centaurea stoebe |
5 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
13 |
| sprucefir fleabane |
Erigeron eximius |
2 |
| stemless thistle |
Cirsium tioganum |
4 |
| stinking camphorweed |
Pluchea foetida |
3 |
| stinking chamomile |
Anthemis cotula |
3 |
| stinkweed |
Pluchea camphorata |
3 |
| strawflower |
Helichrysum petiolare |
1 |
| streamside fleabane |
Erigeron glabellus |
3 |
| subalpine fleabane |
Erigeron peregrinus |
1 |
| Suisun Marsh aster |
Symphyotrichum lentum |
2 |
| sunflower |
Helianthus spp. |
2 |
| swamp sunflower |
Helianthus angustifolius |
4 |
| sweet joepyeweed |
Eupatorium purpureum |
2 |
| tall ironweed |
Vernonia angustifolia |
1 |
| tall ironweed |
Vernonia gigantea |
2 |
| tall lettuce |
Lactuca canadensis |
9 |
| tall ragwort |
Senecio serra |
1 |
| tansy ragwort |
Senecio jacobaea |
3 |
| tarragon |
Artemisia dracunculus |
1 |
| Texas yellowstar |
Lindheimera texana |
2 |
| thistle |
Cirsium spp. |
3 |
| treedaisy |
Montanoa hibiscifolia |
2 |
| uplands white goldenrod |
Solidago ptarmicoides |
1 |
| upright prairie coneflower |
Ratibida columnifera |
1 |
| vanillaleaf |
Carphephorus odoratissimus |
13 |
| Waianae Range nehe |
Lipochaeta tenuifolia |
1 |
| wall lettuce |
Mycelis muralis |
9 |
| wand goldenrod |
Solidago stricta |
3 |
| wavyleaf thistle |
Cirsium undulatum |
1 |
| western aster |
Symphyotrichum ascendens |
6 |
| western mountain aster |
Symphyotrichum spathulatum var. spathulatum |
1 |
| western salsify |
Tragopogon dubius |
3 |
| white panicle aster |
Symphyotrichum lanceolatum |
1 |
| white snakeroot |
Ageratina altissima |
1 |
| whiteflower leafcup |
Polymnia canadensis |
3 |
| whiteplume wirelettuce |
Stephanomeria exigua ssp. coronaria |
1 |
| whitestem goldenbush |
Ericameria discoidea |
1 |
| willowleaf lettuce |
Lactuca saligna |
1 |
| woodland groundsel |
Senecio sylvaticus |
1 |
| woodland sunflower |
Helianthus divaricatus |
2 |
| woody goldenrod |
Chrysoma pauciflosculosa |
6 |
| woolly ragwort |
Packera tomentosa |
4 |
| woolly sunbonnets |
Chaptalia tomentosa |
4 |
| yankeeweed |
Eupatorium compositifolium |
1 |
| yarrow |
Achillea aegyptiaca |
5 |
| yellow starthistle |
Centaurea solstitialis |
2 |
| yellow thistle |
Cirsium horridulum |
2 |
| yellowspine thistle |
Cirsium ochrocentrum |
2 |
