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