text: erigeron canadensis, sisymbrium altissimum, matricaria chamomilla, poa annua, tripleurospermum inodorum, arenaria serpyllifolia, capsella bursa-pastoris, cirsium arvense, descurainia sophia, lysimachia arvensis, matricaria discoidea, plantago major, sonchus oleraceus, trifolium repens, vicia hirsuta, viola arvensis, artemisia vulgaris, chenopodium album, galium aparine, trifolium arvense