herniaria hirsuta, erigeron canadensis, plantago major, polycarpon tetraphyllum, arenaria leptoclados, matricaria chamomilla, poa annua, chondrilla juncea, cynodon dactylon, digitaria sanguinalis, eragrostis pilosa, hordeum murinum, lepidium draba, portulaca oleracea, trifolium repens, veronica arvensis