hordeum murinum, convolvulus arvensis, polygonum aviculare, amaranthus retroflexus, apera spica-venti, atriplex oblongifolia, chenopodium album, erigeron canadensis, lolium perenne, portulaca oleracea, stellaria media, capsella bursa-pastoris, cichorium intybus, echium vulgare, eragrostis minor