ceratodon purpureus, arenaria serpyllifolia, erigeron canadensis, herniaria glabra, logfia minima, plantago lanceolata, poa annua, sagina procumbens, spergularia rubra, agrostis capillaris, potentilla argentea, rumex acetosella, tanacetum vulgare, achillea millefolium, artemisia vulgaris, capsella bursa-pastoris