carduus nutans, erigeron canadensis, arctium minus, chenopodium album, cirsium vulgare, cynodon dactylon, descurainia sophia, hordeum murinum, lactuca saligna, lactuca serriola, lolium perenne, medicago lupulina, plantago lanceolata, poa pratensis, polygonum aviculare, trifolium pratense, trifolium repens, xanthium spinosum