grindelia squarrosa, erigeron canadensis, ambrosia artemisiifolia, artemisia absinthium, berteroa incana, bromus japonicus, capsella bursa-pastoris, cichorium intybus, cirsium arvense, convolvulus arvensis, erigeron acris, euphorbia seguieriana, lactuca tatarica, lepidium perfoliatum, thlaspi arvense, delphinium consolida, descurainia sophia, poa angustifolia