plantago major, matricaria discoidea, poa annua, polygonum aviculare, erigeron canadensis, lolium perenne, agrostis capillaris, bromus hordeaceus, galinsoga parviflora, hordeum murinum, lepidium ruderale, medicago lupulina, rumex obtusifolius, senecio vulgaris, sisymbrium officinale, trifolium repens