text: hordeum distichon, apera spica-venti, capsella bursa-pastoris, chenopodium album, cirsium arvense, convolvulus arvensis, elymus repens, fallopia convolvulus, lactuca serriola, matricaria discoidea, rumex acetosella, scleranthus annuus, thlaspi arvense, tripleurospermum inodorum, viola arvensis, carduus acanthoides, echium vulgare, veronica arvensis