text: aphanes arvensis, apera spica-venti, anthemis arvensis, argentina anserina, buglossoides arvensis, capsella bursa-pastoris, cerastium holosteoides, convolvulus arvensis, erigeron canadensis, persicaria hydropiper, rorippa sylvestris, spergula arvensis, teesdalia nudicaulis, tripleurospermum inodorum, veronica hederifolia, vicia sativa, viola arvensis