grindelia squarrosa, bromus japonicus, ambrosia artemisiifolia, artemisia absinthium, capsella bursa-pastoris, chondrilla juncea, cirsium arvense, convolvulus arvensis, delphinium consolida, echium vulgare, erigeron canadensis, lactuca serriola, matricaria chamomilla, melilotus officinalis, papaver dubium, poa angustifolia, sisymbrium loeselii, thlaspi arvense, carduus acanthoides, silene latifolia