bryum argenteum, sagina procumbens, poa annua, achillea millefolium, artemisia vulgaris, ceratodon purpureus, cirsium arvense, erigeron canadensis, lepidium ruderale, lolium perenne, plantago lanceolata, plantago major, polygonum aviculare, potentilla supina, trifolium repens, urtica dioica