be, arr. leuven, quercus rubra, castanea sativa, prunus serotina, quercus robur, pinus sylvestris, fagus sylvatica, molinia caerulea, betula pendula, carex pilulifera, sorbus aucuparia, vaccinium myrtillus, frangula alnus, lonicera periclymenum, dryopteris carthusiana, pteridium aquilinum, avenella flexuosa, deschampsia flexuosa, dryopteris dilatata, teucrium scorodonia, ilex aquifolium, pinus nigra, juncus effusus, calluna vulgaris, betula pubescens, quercus petraea, acer pseudoplatanus, pseudotsuga menziesii, athyrium filix-femina, luzula pilosa, corylus avellana, larix kaempferi, convallaria majalis, agrostis capillaris, holcus mollis, picea abies, hedera helix, juncus conglomeratus, carpinus betulus, rhododendron ponticum, plantago subulata, pinus strobus, maianthemum bifolium, amelanchier lamarckii, alnus glutinosa, larix decidua, robinia pseudoacacia, cytisus scoparius, salix caprea, pinus pinaster, populus tremula