eragrostis minor, digitaria sanguinalis, ceratodon purpureus, artemisia vulgaris, bryum argenteum, capsella bursa-pastoris, erigeron annuus, erigeron canadensis, lactuca serriola, papaver rhoeas, portulaca oleracea, silene vulgaris, viola arvensis, daucus carota, picris hieracioides, solidago canadensis