be, arr. leuven, bidens frondosa, potentilla indica, prunus serotina, quercus rubra, pilosella aurantiaca, heracleum sphondylium, silene coronaria, quercus robur, galinsoga quadriradiata, ranunculus repens, holcus lanatus, lathyrus latifolius, urtica dioica, claytonia perfoliata, juncus tenuis, juncus effusus, amelanchier lamarckii, tanacetum vulgare, poa trivialis, arrhenatherum elatius, populus canadensis, potentilla recta, rumex acetosa, impatiens glandulifera, alnus glutinosa, galanthus nivalis, melilotus albus, geranium pyrenaicum, castanea sativa, filipendula ulmaria, echinochloa crus-galli, phytolacca acinosa, symphoricarpos albus, erigeron sumatrensis, agrostis capillaris, geum macrophyllum, crassula helmsii, lepidium didymum, alopecurus pratensis, oxalis stricta, geranium phaeum, angelica sylvestris, cardamine pratensis, lycopus europaeus, lolium multiflorum, lysimachia vulgaris, phalaris arundinacea, cirsium arvense, galeopsis tetrahit, rhododendron ponticum