poa annua, plantago major, capsella bursa-pastoris, erigeron canadensis, hordeum murinum, lolium perenne, lysimachia arvensis, malva neglecta, matricaria discoidea, medicago lupulina, polygonum aviculare, verbena officinalis, lotus corniculatus, oxybasis glauca, persicaria lapathifolia, ranunculus acris, senecio vulgaris, solanum nigrum