medicago sativa, capsella bursa-pastoris, arabidopsis thaliana, stellaria media, lamium purpureum, arenaria serpyllifolia, dactylis glomerata, elymus repens, erigeron annuus, oenothera biennis, onopordum acanthium, poa angustifolia, silene latifolia, tripleurospermum inodorum, veronica arvensis