arabidopsis thaliana, draba verna, bryum argenteum, cerastium semidecandrum, rumex acetosella, scleranthus annuus, teesdalia nudicaulis, achillea millefolium, agrostis capillaris, ceratodon purpureus, cladonia foliacea, hypochaeris radicata, pilosella officinarum, plantago lanceolata, polytrichum juniperinum, stellaria graminea