text: apera spica-venti, ceratodon purpureus, erigeron canadensis, filago arvensis, holosteum umbellatum, trifolium arvense, viola arvensis, arabidopsis thaliana, crepis tectorum, elymus repens, erodium cicutarium, fallopia convolvulus, hypochaeris radicata, jasione montana, myosotis stricta, senecio vernalis, veronica arvensis, artemisia vulgaris, cerastium holosteoides, logfia minima, rumex acetosella, vicia sativa, berteroa incana, bromus tectorum, chenopodium album