be, arr. leuven, quercus robur, populus canadensis, holcus lanatus, ranunculus repens, angelica sylvestris, filipendula ulmaria, juncus effusus, urtica dioica, rumex acetosa, cirsium palustre, agrostis capillaris, arrhenatherum elatius, alnus glutinosa, poa trivialis, cirsium arvense, galeopsis tetrahit, alopecurus pratensis, lysimachia vulgaris, ranunculus acris, stellaria graminea, heracleum sphondylium, galium aparine, phalaris arundinacea, cardamine pratensis, glechoma hederacea, prunus serotina, equisetum palustre, anthoxanthum odoratum, phragmites australis, lythrum salicaria, lotus pedunculatus, holcus mollis, symphytum officinale, silene flos-cuculi, juncus acutiflorus, betula pendula, festuca rubra, iris pseudacorus, lonicera periclymenum, juncus conglomeratus, sambucus nigra, cerastium fontanum, carex acuta, galium palustre, fraxinus excelsior, calystegia sepium, sorbus aucuparia, lycopus europaeus, plantago lanceolata, frangula alnus