artemisia absinthium, ceratodon purpureus, elymus repens, brachythecium albicans, bryum argenteum, potentilla cinerea, anthoxanthum aristatum, apera spica-venti, chenopodium album, dactylis glomerata, poa angustifolia, setaria viridis, corynephorus canescens, erigeron canadensis, spergula arvensis