text: centaurea cyanus, elymus repens, apera spica-venti, aphanes arvensis, arabidopsis thaliana, arenaria serpyllifolia, chenopodium album, draba verna, fallopia convolvulus, scleranthus annuus, setaria viridis, stellaria media, trifolium arvense, veronica triphyllos, veronica verna, vicia hirsuta, vicia sativa, artemisia vulgaris, roemeria argemone