tussilago farfara, achillea millefolium, artemisia vulgaris, bromus tectorum, daucus carota, lolium perenne, melilotus albus, calamagrostis epigejos, carduus acanthoides, cirsium arvense, convolvulus arvensis, erigeron canadensis, poa compressa, reseda lutea, sonchus oleraceus, stellaria media, trifolium pratense, tripleurospermum inodorum