brassica nigra, erigeron canadensis, lactuca serriola, persicaria lapathifolia, poa annua, tripleurospermum maritimum, erysimum cheiranthoides, barbula unguiculata, bryum argenteum, gemmabryum dichotomum, senecio viscosus, streblotrichum convolutum, artemisia vulgaris, cirsium arvense, oenothera biennis, poa trivialis, polygonum aviculare, tussilago farfara