artemisia vulgaris, arctium lappa, arctium minus, carduus acanthoides, elymus repens, solidago gigantea, achillea millefolium, lolium perenne, poa palustris, solidago canadensis, ballota nigra, bromus hordeaceus, convolvulus arvensis, erigeron canadensis, hordeum murinum, silene latifolia, tussilago farfara, urtica dioica, cirsium arvense, rumex crispus, sisymbrium loeselii