lepidium ruderale, erigeron canadensis, bromus tectorum, convolvulus arvensis, lolium perenne, achillea millefolium, arctium lappa, arctium tomentosum, artemisia vulgaris, carduus acanthoides, chenopodium album, galinsoga parviflora, hordeum murinum, lactuca serriola, matricaria discoidea, pastinaca sativa, plantago major, tripleurospermum inodorum