medicago lupulina, bromus hordeaceus, ceratodon purpureus, arenaria serpyllifolia, bromus tectorum, bryum argenteum, capsella bursa-pastoris, chaenorhinum minus, cirsium arvense, erigeron canadensis, fallopia convolvulus, festuca rubra, matricaria discoidea, potentilla supina, senecio viscosus, sonchus oleraceus, tripleurospermum inodorum, achillea millefolium, bidens tripartita, persicaria lapathifolia