be, arr. leuven, quercus robur, quercus rubra, lonicera periclymenum, prunus serotina, sorbus aucuparia, corylus avellana, castanea sativa, betula pendula, frangula alnus, sambucus nigra, acer pseudoplatanus, polygonatum multiflorum, fraxinus excelsior, urtica dioica, populus canadensis, glechoma hederacea, hedera helix, holcus mollis, crataegus monogyna, alnus glutinosa, dryopteris carthusiana, prunus avium, galeopsis tetrahit, galium aparine, heracleum sphondylium, betula pubescens, teucrium scorodonia, anemone nemorosa, ribes rubrum, holcus lanatus, pinus sylvestris, molinia caerulea, viburnum opulus, angelica sylvestris, carpinus betulus, agrostis capillaris, robinia pseudoacacia, geum urbanum, poa trivialis, dryopteris dilatata, fagus sylvatica, pteridium aquilinum, athyrium filix-femina, populus tremula, moehringia trinervia, filipendula ulmaria, ficaria verna, juncus effusus, ranunculus repens, avenella flexuosa