hordeum vulgare, cirsium arvense, equisetum arvense, viola arvensis, apera spica-venti, buglossoides arvensis, centaurea cyanus, convolvulus arvensis, elymus repens, euphorbia exigua, myosotis stricta, persicaria maculosa, raphanus raphanistrum, spergularia rubra, anthemis arvensis, aphanes arvensis, capsella bursa-pastoris, chenopodium album, galium aparine, lamium amplexicaule, papaver rhoeas, polygonum aviculare, sinapis arvensis, stellaria media, thlaspi arvense, veronica hederifolia, veronica polita