| Bigelow's sneezeweed |
Helenium bigelovii |
1 |
| blessed milkthistle |
Silybum marianum |
1 |
| British yellowhead |
Inula britannica |
1 |
| bull cottonthistle |
Onopordum tauricum |
1 |
| bull thistle |
Cirsium vulgare |
1 |
| burrobush |
Ambrosia salsola |
2 |
| California cottonrose |
Logfia filaginoides |
1 |
| capeweed |
Arctotheca calendula |
2 |
| coat buttons |
Tridax procumbens |
1 |
| common groundsel |
Senecio vulgaris |
1 |
| common tarweed |
Centromadia pungens |
1 |
| dandelion |
Taraxacum officinale |
1 |
| desertbroom |
Baccharis sarothroides |
1 |
| feverfew |
Tanacetum parthenium |
1 |
| hairy cat's ear |
Hypochaeris radicata |
1 |
| hairy fleabane |
Conyza bonariensis |
1 |
| horse thistle |
Onopordum acaulon |
1 |
| horseweed |
Conyza canadensis |
1 |
| Illyrian cottonthistle |
Onopordum illyricum |
1 |
| Kellogg's tarweed |
Deinandra kelloggii |
1 |
| Kern tarweed |
Deinandra pallida |
1 |
| ladies' tobacco |
Pseudognaphalium californicum |
1 |
| Madagascar ragwort |
Senecio madagascariensis |
1 |
| Malta starthistle |
Centaurea melitensis |
2 |
| narrowleaf cottonrose |
Logfia gallica |
1 |
| pineapple-weed |
Matricaria discoidea |
1 |
| poverty sumpweed |
Iva axillaris |
1 |
| purple cudweed |
Gamochaeta purpurea |
1 |
| purple starthistle |
Centaurea calcitrapa |
1 |
| rosilla |
Helenium puberulum |
1 |
| rush skeletonweed |
Chondrilla juncea |
1 |
| saltmarsh baccharis |
Baccharis douglasii |
1 |
| Scotch thistle |
Onopordum acanthium |
2 |
| seepwillow |
Baccharis salicifolia |
1 |
| smooth cat's ear |
Hypochaeris glabra |
2 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny sowthistle |
Sonchus asper |
1 |
| stinking chamomile |
Anthemis cotula |
1 |
| tall fleabane |
Conyza floribunda |
1 |
| two-color rabbit-tobacco |
Pseudognaphalium biolettii |
1 |
| western marsh cudweed |
Gnaphalium palustre |
1 |
| western ragweed |
Ambrosia psilostachya |
1 |
| yellow starthistle |
Centaurea solstitialis |
1 |
