populus canadensis, poa trivialis, alopecurus pratensis, cirsium arvense, galium aparine, phalaris arundinacea, urtica dioica, arrhenatherum elatius, filipendula ulmaria, holcus lanatus, silene flos-cuculi, tanacetum vulgare, cardamine pratensis, heracleum sphondylium, iris pseudacorus, symphytum officinale