artemisia absinthium, elymus repens, bromus hordeaceus, ceratodon purpureus, festuca trachyphylla, apera spica-venti, arenaria serpyllifolia, brachythecium rutabulum, bryum argenteum, erodium cicutarium, scleranthus annuus, agrostis stolonifera, dactylis glomerata, erigeron canadensis, geranium molle, plantago lanceolata