carduus acanthoides, amaranthus retroflexus, arenaria serpyllifolia, capsella bursa-pastoris, chenopodium album, erigeron canadensis, geranium pusillum, lactuca serriola, lolium perenne, medicago lupulina, onopordum acanthium, persicaria lapathifolia, polygonum aviculare, setaria pumila, stellaria media, trifolium repens