asclepias syriaca, achillea millefolium, ambrosia artemisiifolia, artemisia absinthium, cirsium arvense, delphinium consolida, erigeron canadensis, jacobaea erucifolia, linaria genistifolia, poa angustifolia, convolvulus arvensis, grindelia squarrosa, matricaria chamomilla, odontites vulgaris, pilosella echioides, seseli annuum, sonchus arvensis, tragopogon dubius, trifolium pratense, melilotus officinalis