be, arr. leuven, populus canadensis, arrhenatherum elatius, cirsium arvense, heracleum sphondylium, urtica dioica, symphytum officinale, ranunculus repens, alopecurus pratensis, glechoma hederacea, holcus lanatus, poa trivialis, phalaris arundinacea, galium aparine, calystegia sepium, tanacetum vulgare, filipendula ulmaria, angelica sylvestris, ranunculus acris, quercus robur, phragmites australis, rumex acetosa, elymus repens, dactylis glomerata, lolium perenne, galeopsis tetrahit, lathyrus pratensis, vicia cracca, persicaria amphibia, plantago lanceolata, agrostis capillaris, crataegus monogyna, equisetum arvense, rumex obtusifolius, anthriscus sylvestris, stellaria graminea, sambucus nigra, centaurea jacea, cerastium holosteoides, achillea millefolium, agrostis stolonifera, lythrum salicaria, alnus glutinosa, cerastium fontanum, juncus effusus, fraxinus excelsior, rumex crispus, trifolium repens, trifolium pratense, festuca rubra, iris pseudacorus