be, arr. leuven, quercus robur, quercus rubra, castanea sativa, lonicera periclymenum, sorbus aucuparia, prunus serotina, acer pseudoplatanus, betula pendula, corylus avellana, fagus sylvatica, sambucus nigra, frangula alnus, hedera helix, dryopteris carthusiana, fraxinus excelsior, pinus sylvestris, dryopteris dilatata, teucrium scorodonia, polygonatum multiflorum, pteridium aquilinum, athyrium filix-femina, urtica dioica, prunus avium, betula pubescens, deschampsia flexuosa, avenella flexuosa, vaccinium myrtillus, alnus glutinosa, carpinus betulus, holcus mollis, molinia caerulea, glechoma hederacea, juncus effusus, galeopsis tetrahit, ilex aquifolium, robinia pseudoacacia, carex pilulifera, lamium galeobdolon, agrostis capillaris, salix caprea, anemone nemorosa, dryopteris filix-mas, moehringia trinervia, crataegus monogyna, geum urbanum, convallaria majalis, holcus lanatus, circaea lutetiana, galium aparine, populus canadensis