be, arr. leuven, potentilla indica, pilosella aurantiaca, bidens frondosa, claytonia perfoliata, lathyrus latifolius, galinsoga quadriradiata, prunus serotina, silene coronaria, quercus rubra, galanthus nivalis, amelanchier lamarckii, phytolacca acinosa, juncus tenuis, geranium pyrenaicum, geranium phaeum, heracleum sphondylium, echinochloa crus-galli, lepidium didymum, erigeron sumatrensis, oxalis corniculata, castanea sativa, geum macrophyllum, symphoricarpos albus, potentilla recta, melilotus albus, pentaglottis sempervirens, oxalis stricta, ranunculus repens, rhododendron ponticum, crassula helmsii, quercus robur, urtica dioica, lolium multiflorum, veronica persica, holcus lanatus, setaria helvola, impatiens glandulifera, nymphaea marliacea, tanacetum vulgare, lunaria annua, vicia villosa, claytonia sibirica, geranium macrorrhizum, heracleum mantegazzianum, reynoutria japonica, cardamine pratensis, alnus glutinosa, arum italicum, epilobium ciliatum, juncus effusus