text: triticum aestivum, apera spica-venti, centaurea cyanus, viola arvensis, capsella bursa-pastoris, geranium pusillum, papaver rhoeas, arenaria serpyllifolia, chenopodium album, elymus repens, erodium cicutarium, fallopia convolvulus, poa annua, polygonum aviculare, stellaria media, veronica persica