atriplex sagittata, artemisia vulgaris, atriplex patula, achillea millefolium, capsella bursa-pastoris, carduus acanthoides, chenopodium album, descurainia sophia, elymus repens, erigeron canadensis, fallopia convolvulus, galium aparine, lactuca serriola, pastinaca sativa, persicaria lapathifolia, poa palustris, tripleurospermum inodorum