elymus repens, berteroa incana, convolvulus arvensis, medicago lupulina, ambrosia artemisiifolia, artemisia scoparia, artemisia vulgaris, chenopodium album, echium vulgare, erigeron canadensis, galinsoga parviflora, lepidium densiflorum, oenothera rubricaulis, poa compressa, poa pratensis, potentilla argentea, setaria pumila, trifolium arvense, verbascum phlomoides