be, arr. leuven, quercus rubra, castanea sativa, prunus serotina, quercus robur, acer pseudoplatanus, sorbus aucuparia, lonicera periclymenum, fagus sylvatica, corylus avellana, betula pendula, dryopteris carthusiana, dryopteris dilatata, frangula alnus, hedera helix, sambucus nigra, pteridium aquilinum, pinus sylvestris, polygonatum multiflorum, vaccinium myrtillus, ilex aquifolium, convallaria majalis, fraxinus excelsior, athyrium filix-femina, avenella flexuosa, prunus avium, deschampsia flexuosa, teucrium scorodonia, carex pilulifera, betula pubescens, carpinus betulus, anemone nemorosa, maianthemum bifolium, luzula pilosa, molinia caerulea, lamium galeobdolon, robinia pseudoacacia, hyacinthoides non-scripta, holcus mollis, amelanchier lamarckii, dryopteris filix-mas, urtica dioica, moehringia trinervia, oxalis acetosella, glechoma hederacea, galeopsis tetrahit, alnus glutinosa, juncus effusus, quercus petraea, circaea lutetiana, rhododendron ponticum