erigeron bonariensis, digitaria sanguinalis, verbena officinalis, erigeron floribundus, piptatherum miliaceum, sonchus oleraceus, symphyotrichum squamatum, euphorbia peplus, lysimachia arvensis, medicago lupulina, polygonum aviculare, erigeron canadensis, oxalis corniculata, picris hieracioides, plantago major, senecio vulgaris