be, arr. leuven, quercus robur, quercus rubra, prunus serotina, sorbus aucuparia, betula pendula, frangula alnus, castanea sativa, pinus sylvestris, lonicera periclymenum, molinia caerulea, dryopteris dilatata, dryopteris carthusiana, avenella flexuosa, deschampsia flexuosa, betula pubescens, vaccinium myrtillus, fagus sylvatica, carex pilulifera, calluna vulgaris, teucrium scorodonia, corylus avellana, pteridium aquilinum, amelanchier lamarckii, acer pseudoplatanus, ilex aquifolium, agrostis capillaris, juncus effusus, pinus nigra, holcus mollis, sambucus nigra, hedera helix, holcus lanatus, pseudotsuga menziesii, athyrium filix-femina, larix kaempferi, robinia pseudoacacia, salix caprea, polygonatum multiflorum, alnus glutinosa, populus tremula, rhododendron ponticum, urtica dioica, galeopsis tetrahit, prunus avium, maianthemum bifolium, cytisus scoparius, picea abies, ceratocapnos claviculata, convallaria majalis, erica tetralix