viola arvensis, elymus repens, cirsium arvense, lapsana communis, lolium perenne, sonchus arvensis, agrostis stolonifera, lamium purpureum, poa annua, senecio vulgaris, tripleurospermum inodorum, arenaria serpyllifolia, argentina anserina, capsella bursa-pastoris, myosotis arvensis, trifolium pratense