eragrostis minor, panicum dichotomiflorum, erigeron canadensis, plantago major, polygonum aviculare, portulaca oleracea, valeriana officinalis, chenopodium album, digitaria sanguinalis, echinochloa crus-galli, lythrum salicaria, setaria pumila, trifolium hybridum, epilobium parviflorum, lactuca serriola