tussilago farfara, salsola tragus, achillea millefolium, agrostis gigantea, cirsium vulgare, crepis tectorum, deschampsia cespitosa, elymus repens, erigeron canadensis, lactuca serriola, lepidium densiflorum, melilotus albus, polygonum aviculare, tripleurospermum inodorum, bromus hordeaceus, chenopodium album, poa annua