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