text: erigeron canadensis, erigeron annuus, hordeum murinum, tanacetum vulgare, bryum argenteum, ceratodon purpureus, epilobium brachycarpum, lactuca serriola, lepidium virginicum, oxalis corniculata, senecio inaequidens, brachythecium albicans, dactylis glomerata, geum urbanum, robinia pseudoacacia, cirsium arvense, cirsium vulgare, diplotaxis tenuifolia, plantago lanceolata, plantago major, poa trivialis, polygonum aviculare