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