polygonum aviculare, achillea millefolium, amaranthus albus, erigeron canadensis, plantago major, artemisia vulgaris, digitaria sanguinalis, galinsoga parviflora, lepidium ruderale, poa annua, scorzoneroides autumnalis, bassia scoparia, cirsium arvense, erysimum cheiranthoides, lolium perenne, matricaria chamomilla, poa compressa, tussilago farfara