polygonum aviculare, eragrostis minor, eragrostis pilosa, lolium perenne, amaranthus deflexus, amaranthus retroflexus, artemisia vulgaris, bidens tripartita, chenopodium album, cirsium arvense, cynodon dactylon, digitaria sanguinalis, echinochloa crus-galli, erigeron canadensis, helianthus annuus, juncus compressus, medicago lupulina, phaeoceros carolinianus, plantago major, poa annua, rorippa sylvestris, salvia nemorosa, setaria viridis