be, arr. tongeren, prunus serotina, quercus robur, pinus sylvestris, sorbus aucuparia, betula pendula, quercus rubra, avenella flexuosa, vaccinium myrtillus, frangula alnus, deschampsia flexuosa, fagus sylvatica, dryopteris carthusiana, dryopteris dilatata, lonicera periclymenum, castanea sativa, molinia caerulea, calluna vulgaris, betula pubescens, carex pilulifera, ilex aquifolium, pseudotsuga menziesii, pteridium aquilinum, amelanchier lamarckii, ceratocapnos claviculata, quercus petraea, pinus nigra, picea abies, agrostis capillaris, holcus mollis, teucrium scorodonia, galium saxatile, larix kaempferi, melampyrum pratense, acer pseudoplatanus, hedera helix, corylus avellana, rumex angiocarpus, luzula pilosa, rubus idaeus, populus tremula, rumex acetosella, galeopsis tetrahit, maianthemum bifolium, rubus plicatus, convallaria majalis, cytisus scoparius, robinia pseudoacacia, polygonatum multiflorum, moehringia trinervia, sambucus nigra