grindelia squarrosa, ambrosia artemisiifolia, berteroa incana, bromus japonicus, bromus tectorum, capsella bursa-pastoris, cirsium arvense, convolvulus arvensis, cyclachaena xanthiifolia, descurainia sophia, lepidium perfoliatum, matricaria chamomilla, poa angustifolia, sisymbrium loeselii, thlaspi arvense