polygonum aviculare, capsella bursa-pastoris, lolium perenne, hordeum murinum, plantago major, trifolium repens, amaranthus retroflexus, artemisia vulgaris, convolvulus arvensis, erigeron annuus, galinsoga quadriradiata, lactuca serriola, malva neglecta, poa pratensis, stellaria media, trifolium pratense