tripleurospermum inodorum, tussilago farfara, artemisia vulgaris, lactuca serriola, lipandra polysperma, aethusa cynapium, capsella bursa-pastoris, erigeron canadensis, poa annua, sonchus oleraceus, erysimum cheiranthoides, galinsoga parviflora, senecio vulgaris, sonchus asper, solidago canadensis