text: cerastium semidecandrum, ceratodon purpureus, arenaria serpyllifolia, bryum argenteum, dactylis glomerata, erigeron canadensis, festuca trachyphylla, holosteum umbellatum, medicago lupulina, poa angustifolia, trifolium arvense, trifolium campestre, arabidopsis arenosa, arrhenatherum elatius, hypericum perforatum, polytrichum piliferum, veronica arvensis, viola arvensis, melilotus officinalis