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