erigeron canadensis, chenopodium album, lactuca serriola, achillea millefolium, artemisia vulgaris, linaria vulgaris, poa compressa, polygonum aviculare, senecio vulgaris, sinapis arvensis, bromus tectorum, capsella bursa-pastoris, crepis biennis, elymus repens, fallopia convolvulus, galinsoga parviflora, matricaria discoidea, poa annua