ambrosia artemisiifolia, echium vulgare, artemisia absinthium, convolvulus arvensis, erigeron canadensis, melilotus officinalis, pilosella echioides, poa angustifolia, bromus tectorum, carduus acanthoides, cichorium intybus, descurainia sophia, lactuca tatarica, lappula squarrosa, noccaea perfoliata