| alpine knapweed |
Centaurea nigrescens |
1 |
| annual bursage |
Ambrosia acanthicarpa |
1 |
| annual fleabane |
Erigeron annuus |
1 |
| annual sowthistle |
Sonchus oleraceus |
3 |
| Asiatic hawksbeard |
Youngia japonica |
5 |
| aster |
Aster spp. |
2 |
| Aster |
|
1 |
| biennial wormwood |
Artemisia biennis |
1 |
| bitter sneezeweed |
Helenium amarum |
1 |
| black knapweed |
Centaurea nigra |
2 |
| blessed milkthistle |
Silybum marianum |
6 |
| blessed thistle |
Cnicus benedictus |
1 |
| blue and white daisybush |
Osteospermum ecklonis |
1 |
| blue lettuce |
Lactuca tatarica var. pulchella |
1 |
| boneset |
Eupatorium perfoliatum |
2 |
| brassbuttons |
Cotula coronopifolia |
1 |
| bristly hawksbeard |
Crepis setosa |
1 |
| British yellowhead |
Inula britannica |
9 |
| brown knapweed |
Centaurea jacea |
6 |
| bull cottonthistle |
Onopordum tauricum |
4 |
| bull thistle |
Cirsium vulgare |
40 |
| Canada thistle |
Cirsium arvense |
76 |
| cape ivy |
Delairea odorata |
1 |
| capeweed |
Arctotheca calendula |
2 |
| cardoon |
Cynara cardunculus |
1 |
| cat's ear |
Hypochaeris spp. |
2 |
| chicory |
Cichorium intybus |
13 |
| coltsfoot |
Tussilago farfara |
21 |
| common burdock |
Arctium minus |
9 |
| common cocklebur |
Xanthium strumarium |
1 |
| common crupina |
Crupina vulgaris |
3 |
| common groundsel |
Senecio vulgaris |
4 |
| common ragweed |
Ambrosia artemisiifolia |
2 |
| common salsify |
Tragopogon porrifolius |
1 |
| common sunflower |
Helianthus annuus |
4 |
| common tansy |
Tanacetum vulgare |
9 |
| common tarweed |
Centromadia pungens ssp. pungens |
4 |
| common yarrow |
Achillea millefolium |
7 |
| corn chamomile |
Anthemis arvensis |
1 |
| cornflower |
Centaurea cyanus |
3 |
| croftonweed |
Ageratina adenophora |
3 |
| cup rosinweed |
Silphium perfoliatum |
14 |
| dandelion |
Taraxacum officinale |
7 |
| dandelion |
Taraxacum spp. |
1 |
| devils beggarticks |
Bidens frondosa |
1 |
| diffuse knapweed |
Centaurea diffusa |
10 |
| early goldenrod |
Solidago juncea |
2 |
| eclipta |
Eclipta prostrata |
1 |
| English daisy |
Bellis perennis |
4 |
| false chamomile |
Tripleurospermum perforatum |
3 |
| fernleaf yarrow |
Achillea filipendulina |
2 |
| field thistle |
Cirsium discolor |
4 |
| Florida wild lettuce |
Lactuca floridana |
1 |
| giant ironweed |
Vernonia gigantea gigantea |
6 |
| giant ragweed |
Ambrosia trifida |
1 |
| glandular Cape marigold |
Dimorphotheca sinuata |
1 |
| goatsbeard |
Tragopogon spp. |
2 |
| goldenrod |
Solidago spp. |
1 |
| great burdock |
Arctium lappa |
2 |
| great globethistle |
Echinops sphaerocephalus |
3 |
| hairy beggarticks |
Bidens pilosa |
2 |
| hairy cat's ear |
Hypochaeris radicata |
3 |
| hairy fleabane |
Conyza bonariensis |
1 |
| hairy galinsoga |
Galinsoga ciliata |
5 |
| hairy white oldfield aster |
Symphyotrichum pilosum var. pilosum |
3 |
| hawkweeds |
Hieracium spp. |
7 |
| horseweed |
Conyza canadensis |
4 |
| Italian plumeless thistle |
Carduus pycnocephalus |
3 |
| Jerusalem artichoke |
Helianthus tuberosus |
5 |
| joe pye weed |
Eupatoriadelphus spp. |
8 |
| knapweeds |
Centaurea spp. |
5 |
| Malta starthistle |
Centaurea melitensis |
3 |
| meadow hawkweed |
Hieracium caespitosum |
6 |
| meadow knapweed |
Centaurea moncktonii |
6 |
| meadow salsify |
Tragopogon lamottei |
2 |
| moist sowthistle |
Sonchus arvensis ssp. uliginosus |
1 |
| mouseear hawkweed |
Hieracium pilosella |
1 |
| mugwort |
Artemisia vulgaris |
3 |
| musk thistle |
Carduus nutans |
53 |
| narrowleaf hawksbeard |
Crepis tectorum |
4 |
| North African knapweed |
Centaurea diluta |
1 |
| orange hawkweed |
Hieracium aurantiacum |
11 |
| oxeye daisy |
Leucanthemum vulgare |
15 |
| perennial sowthistle |
Sonchus arvensis |
9 |
| pineapple-weed |
Matricaria discoidea |
3 |
| prickly lettuce |
Lactuca serriola |
8 |
| purple starthistle |
Centaurea calcitrapa |
4 |
| rosering gaillardia |
Gaillardia pulchella |
1 |
| rush skeletonweed |
Chondrilla juncea |
3 |
| Russian knapweed |
Rhaponticum repens |
7 |
| Scotch thistle |
Onopordum acanthium |
9 |
| seepwillow |
Baccharis salicifolia |
2 |
| Senegal tea plant |
Gymnocoronis spilanthoides |
1 |
| skeletonleaf bursage |
Ambrosia tomentosa |
1 |
| slenderflower thistle |
Carduus tenuiflorus |
1 |
| smooth hawksbeard |
Crepis capillaris |
1 |
| southern brassbuttons |
Cotula australis |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
6 |
| spiny sowthistle |
Sonchus asper |
6 |
| spotted knapweed |
Centaurea stoebe |
40 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
35 |
| squarrose knapweed |
Centaurea virgata |
6 |
| stinking chamomile |
Anthemis cotula |
4 |
| tall fleabane |
Conyza floribunda |
1 |
| tall ironweed |
Vernonia gigantea |
2 |
| tansy ragwort |
Senecio jacobaea |
30 |
| thistle |
Cirsium spp. |
8 |
| tree marigold |
Tithonia diversifolia |
1 |
| wall lettuce |
Mycelis muralis |
19 |
| wavyleaf thistle |
Cirsium undulatum |
1 |
| western ragweed |
Ambrosia psilostachya |
1 |
| western salsify |
Tragopogon dubius |
11 |
| white heath aster |
Symphyotrichum ericoides var. ericoides |
4 |
| white snakeroot |
Ageratina altissima |
1 |
| willowleaf lettuce |
Lactuca saligna |
1 |
| yellow chamomile |
Anthemis tinctoria |
1 |
| yellow starthistle |
Centaurea solstitialis |
25 |
| yellowspine thistle |
Cirsium ochrocentrum |
1 |
