portulaca oleracea, lolium perenne, setaria viridis, chenopodium album, achillea millefolium, digitaria sanguinalis, erigeron canadensis, gemmabryum caespiticium, lepidium densiflorum, amaranthus hybridus, arenaria serpyllifolia, bromus hordeaceus, capsella bursa-pastoris, eragrostis minor, erodium ciconium, fallopia convolvulus, funaria hygrometrica, malva neglecta, medicago lupulina, senecio viscosus, sisymbrium loeselii, sonchus oleraceus, thlaspi arvense, trifolium arvense