viola arvensis, apera spica-venti, aphanes arvensis, arabidopsis thaliana, arenaria serpyllifolia, centaurea cyanus, elymus repens, poa annua, stellaria media, thlaspi arvense, tripleurospermum inodorum, veronica arvensis, lamium purpureum, myosotis arvensis, scleranthus annuus, veronica triphyllos