eragrostis pilosa, portulaca oleracea, bryum argenteum, matricaria discoidea, poa annua, sonchus oleraceus, trifolium repens, echinochloa crus-galli, galinsoga parviflora, lepidium ruderale, matricaria chamomilla, plantago major, sagina procumbens, capsella bursa-pastoris, erigeron canadensis, senecio vulgaris, trifolium pratense