be, arr. leuven, quercus rubra, castanea sativa, quercus robur, prunus serotina, sorbus aucuparia, fagus sylvatica, lonicera periclymenum, betula pendula, frangula alnus, pinus sylvestris, acer pseudoplatanus, pteridium aquilinum, dryopteris carthusiana, corylus avellana, ilex aquifolium, dryopteris dilatata, vaccinium myrtillus, hedera helix, avenella flexuosa, sambucus nigra, teucrium scorodonia, carex pilulifera, deschampsia flexuosa, polygonatum multiflorum, betula pubescens, carpinus betulus, molinia caerulea, athyrium filix-femina, prunus avium, quercus petraea, fraxinus excelsior, holcus mollis, robinia pseudoacacia, luzula pilosa, maianthemum bifolium, picea abies, pseudotsuga menziesii, convallaria majalis, oxalis acetosella, dryopteris filix-mas, lamium galeobdolon, anemone nemorosa, calluna vulgaris, populus tremula, urtica dioica, moehringia trinervia, hyacinthoides non-scripta, larix decidua, juncus effusus, alnus glutinosa