eragrostis pilosa, eragrostis virescens, polygonum bellardii, eragrostis cilianensis, portulaca oleracea, setaria viridis, amaranthus powellii, capsella bursa-pastoris, chenopodium album, medicago sativa, melilotus albus, plantago lanceolata, cynodon dactylon, erigeron bonariensis, hirschfeldia incana, melilotus officinalis, senecio vulgaris, sonchus oleraceus