erigeron canadensis, agrostis capillaris, digitaria ischaemum, setaria viridis, apera spica-venti, berteroa incana, carex hirta, draba verna, elymus repens, equisetum ramosissimum, glechoma hederacea, trifolium arvense, tripleurospermum inodorum, veronica verna, chenopodium album, oenothera biennis, oxalis stricta