be, arr. tongeren, pinus sylvestris, prunus serotina, betula pendula, quercus robur, avenella flexuosa, vaccinium myrtillus, sorbus aucuparia, deschampsia flexuosa, quercus rubra, frangula alnus, dryopteris carthusiana, molinia caerulea, fagus sylvatica, dryopteris dilatata, calluna vulgaris, pinus nigra, pseudotsuga menziesii, carex pilulifera, betula pubescens, lonicera periclymenum, castanea sativa, pteridium aquilinum, picea abies, ilex aquifolium, amelanchier lamarckii, quercus petraea, agrostis capillaris, ceratocapnos claviculata, galium saxatile, teucrium scorodonia, vaccinium vitis-idaea, rumex angiocarpus, larix kaempferi, rumex acetosella, holcus mollis, rubus plicatus, juncus effusus, melampyrum pratense, pinus strobus, erica tetralix, rubus idaeus, luzula pilosa, acer pseudoplatanus, corylus avellana, digitalis purpurea, populus tremula, larix decidua, maianthemum bifolium, convallaria majalis, moehringia trinervia