medicago lupulina, erigeron canadensis, hordeum murinum, senecio inaequidens, sisymbrium altissimum, bryum argenteum, chenopodium album, cirsium arvense, plantago major, poa annua, senecio viscosus, corynephorus canescens, polygonum aviculare, rumex acetosella, sagina procumbens, sonchus oleraceus