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