lactuca serriola, arctium tomentosum, artemisia vulgaris, atriplex patula, atriplex sagittata, chenopodium album, descurainia sophia, tripleurospermum inodorum, achillea millefolium, aethusa cynapium, elymus repens, poa palustris, thlaspi arvense, capsella bursa-pastoris, erigeron canadensis