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