| alpine knapweed |
Centaurea nigrescens |
2 |
| annual bursage |
Ambrosia acanthicarpa |
4 |
| annual fleabane |
Erigeron annuus |
1 |
| annual sowthistle |
Sonchus oleraceus |
14 |
| annual wormwood |
Artemisia annua |
1 |
| Asiatic hawksbeard |
Youngia japonica |
6 |
| aster |
Aster spp. |
2 |
| Aster |
|
2 |
| Bay Biscayne creeping-oxeye |
Sphagneticola trilobata |
2 |
| biennial wormwood |
Artemisia biennis |
3 |
| big sagebrush |
Artemisia tridentata |
3 |
| bitter sneezeweed |
Helenium amarum |
5 |
| black knapweed |
Centaurea nigra |
6 |
| blessed milkthistle |
Silybum marianum |
25 |
| blessed thistle |
Cnicus benedictus |
2 |
| blue and white daisybush |
Osteospermum ecklonis |
1 |
| blue lettuce |
Lactuca tatarica var. pulchella |
1 |
| boneset |
Eupatorium perfoliatum |
11 |
| brassbuttons |
Cotula coronopifolia |
3 |
| bristly hawksbeard |
Crepis setosa |
2 |
| British yellowhead |
Inula britannica |
18 |
| brown knapweed |
Centaurea jacea |
20 |
| bull cottonthistle |
Onopordum tauricum |
15 |
| bull thistle |
Cirsium vulgare |
109 |
| bur beggarticks |
Bidens tripartita |
1 |
| Canada goldenrod |
Solidago canadensis |
7 |
| Canada thistle |
Cirsium arvense |
194 |
| cape ivy |
Delairea odorata |
14 |
| capeweed |
Arctotheca calendula |
6 |
| cardoon |
Cynara cardunculus |
4 |
| cat's ear |
Hypochaeris spp. |
3 |
| chicory |
Cichorium intybus |
42 |
| coat buttons |
Tridax procumbens |
2 |
| cocklebur |
Xanthium spp. |
1 |
| coltsfoot |
Tussilago farfara |
100 |
| common burdock |
Arctium minus |
37 |
| common cocklebur |
Xanthium strumarium |
29 |
| common crupina |
Crupina vulgaris |
20 |
| common groundsel |
Senecio vulgaris |
16 |
| common ragweed |
Ambrosia artemisiifolia |
16 |
| common salsify |
Tragopogon porrifolius |
2 |
| common sunflower |
Helianthus annuus |
14 |
| common tansy |
Tanacetum vulgare |
39 |
| common tarweed |
Centromadia pungens ssp. pungens |
12 |
| common yarrow |
Achillea millefolium |
45 |
| corn chamomile |
Anthemis arvensis |
3 |
| cornflower |
Centaurea cyanus |
5 |
| Coulter's horseweed |
Laennecia coulteri |
2 |
| creeping croftonweed |
Ageratina riparia |
1 |
| croftonweed |
Ageratina adenophora |
13 |
| cup rosinweed |
Silphium perfoliatum |
52 |
| dandelion |
Taraxacum officinale |
41 |
| dandelion |
Taraxacum spp. |
9 |
| devils beggarticks |
Bidens frondosa |
6 |
| diffuse knapweed |
Centaurea diffusa |
18 |
| early goldenrod |
Solidago juncea |
4 |
| eclipta |
Eclipta prostrata |
2 |
| English daisy |
Bellis perennis |
6 |
| fall hawkbit |
Leontodon autumnalis |
1 |
| false chamomile |
Tripleurospermum perforatum |
19 |
| fernleaf yarrow |
Achillea filipendulina |
10 |
| field marigold |
Calendula arvensis |
2 |
| field thistle |
Cirsium discolor |
5 |
| flat-top goldentop |
Euthamia graminifolia var. graminifolia |
6 |
| fleabanes |
Erigeron spp. |
1 |
| Florida wild lettuce |
Lactuca floridana |
2 |
| giant ironweed |
Vernonia gigantea gigantea |
22 |
| giant ragweed |
Ambrosia trifida |
16 |
| glandular Cape marigold |
Dimorphotheca sinuata |
2 |
| goatsbeard |
Tragopogon spp. |
8 |
| golden ragwort |
Packera aurea |
1 |
| goldenrod |
Solidago spp. |
17 |
| great burdock |
Arctium lappa |
5 |
| great globethistle |
Echinops sphaerocephalus |
3 |
| hairy beggarticks |
Bidens pilosa |
5 |
| hairy cat's ear |
Hypochaeris radicata |
22 |
| hairy fleabane |
Conyza bonariensis |
3 |
| hairy galinsoga |
Galinsoga ciliata |
13 |
| hairy white oldfield aster |
Symphyotrichum pilosum var. pilosum |
12 |
| hawkweeds |
Hieracium spp. |
12 |
| hempvine |
Mikania spp. |
1 |
| horseweed |
Conyza canadensis |
36 |
| horseweeds |
Conyza spp. |
1 |
| Italian hawksbeard |
Crepis bursifolia |
2 |
| Italian plumeless thistle |
Carduus pycnocephalus |
11 |
| Jerusalem artichoke |
Helianthus tuberosus |
23 |
| joe pye weed |
Eupatoriadelphus spp. |
11 |
| knapweeds |
Centaurea spp. |
5 |
| lawn burweed |
Soliva sessilis |
2 |
| Malta starthistle |
Centaurea melitensis |
5 |
| meadow hawkweed |
Hieracium caespitosum |
22 |
| meadow knapweed |
Centaurea moncktonii |
7 |
| meadow salsify |
Tragopogon lamottei |
5 |
| moist sowthistle |
Sonchus arvensis ssp. uliginosus |
1 |
| mouseear hawkweed |
Hieracium pilosella |
2 |
| mugwort |
Artemisia vulgaris |
20 |
| musk thistle |
Carduus nutans |
150 |
| narrowleaf hawksbeard |
Crepis tectorum |
6 |
| North African knapweed |
Centaurea diluta |
1 |
| orange hawkweed |
Hieracium aurantiacum |
34 |
| oxeye daisy |
Leucanthemum vulgare |
42 |
| perennial sowthistle |
Sonchus arvensis |
45 |
| pineapple-weed |
Matricaria discoidea |
13 |
| prickly lettuce |
Lactuca serriola |
70 |
| purple starthistle |
Centaurea calcitrapa |
15 |
| rosering gaillardia |
Gaillardia pulchella |
1 |
| rush skeletonweed |
Chondrilla juncea |
18 |
| Russian knapweed |
Rhaponticum repens |
30 |
| Scotch thistle |
Onopordum acanthium |
63 |
| Senegal tea plant |
Gymnocoronis spilanthoides |
2 |
| skeletonleaf bursage |
Ambrosia tomentosa |
2 |
| slenderflower thistle |
Carduus tenuiflorus |
3 |
| smallflower galinsoga |
Galinsoga parviflora |
1 |
| smooth hawksbeard |
Crepis capillaris |
3 |
| southern brassbuttons |
Cotula australis |
3 |
| spiny cocklebur |
Xanthium spinosum |
3 |
| spiny plumeless thistle |
Carduus acanthoides |
19 |
| spiny sowthistle |
Sonchus asper |
19 |
| spotted joe pye weed |
Eupatoriadelphus maculatus |
1 |
| spotted knapweed |
Centaurea stoebe |
143 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
102 |
| squarrose knapweed |
Centaurea virgata |
21 |
| stinking chamomile |
Anthemis cotula |
11 |
| sulphur knapweed |
Centaurea sulphurea |
2 |
| tall fleabane |
Conyza floribunda |
2 |
| tall ironweed |
Vernonia gigantea |
15 |
| tall lettuce |
Lactuca canadensis |
4 |
| tansy ragwort |
Senecio jacobaea |
128 |
| thistle |
Cirsium spp. |
9 |
| tree marigold |
Tithonia diversifolia |
1 |
| wall lettuce |
Mycelis muralis |
85 |
| wavyleaf thistle |
Cirsium undulatum |
2 |
| western ragweed |
Ambrosia psilostachya |
1 |
| western salsify |
Tragopogon dubius |
29 |
| white heath aster |
Symphyotrichum ericoides var. ericoides |
12 |
| white snakeroot |
Ageratina altissima |
2 |
| white snakeroot |
Ageratina altissima var. altissima |
4 |
| willowleaf lettuce |
Lactuca saligna |
2 |
| woolly distaff thistle |
Carthamus lanatus |
4 |
| woollyleaf bursage |
Ambrosia grayi |
1 |
| yellow chamomile |
Anthemis tinctoria |
3 |
| yellow hawkweed |
Hieracium fendleri |
1 |
| yellow starthistle |
Centaurea solstitialis |
88 |
| yellow thistle |
Cirsium horridulum |
1 |
| yellowspine thistle |
Cirsium ochrocentrum |
3 |
