lolium perenne, plantago major, polygonum aviculare, bromus hordeaceus, bryum argenteum, capsella bursa-pastoris, crepis biennis, erigeron canadensis, festuca rubra, galinsoga parviflora, gemmabryum caespiticium, hordeum murinum, leontodon hispidus, lepidium draba, medicago lupulina, poa annua, sagina procumbens, scorzoneroides autumnalis, sonchus arvensis, tussilago farfara