ceratodon purpureus, aira praecox, cerastium semidecandrum, arabidopsis thaliana, draba verna, hypochaeris radicata, ornithopus perpusillus, brachythecium albicans, bromus hordeaceus, festuca rubra, teesdalia nudicaulis, achillea millefolium, agrostis capillaris, erigeron canadensis, rumex acetosella