be, arr. nivelles, fagus sylvatica, castanea sativa, quercus rubra, quercus robur, acer pseudoplatanus, dryopteris carthusiana, lonicera periclymenum, athyrium filix-femina, prunus serotina, dryopteris dilatata, sorbus aucuparia, pteridium aquilinum, fraxinus excelsior, corylus avellana, ilex aquifolium, betula pendula, circaea lutetiana, hedera helix, carpinus betulus, juncus effusus, teucrium scorodonia, pinus sylvestris, carex remota, oxalis acetosella, carex pilulifera, vaccinium myrtillus, anemone nemorosa, alnus glutinosa, urtica dioica, avenella flexuosa, quercus petraea, deschampsia flexuosa, luzula pilosa, frangula alnus, lamium galeobdolon, deschampsia cespitosa, sambucus nigra, dryopteris filix-mas, plantago subulata, carex sylvatica, hyacinthoides non-scripta, milium effusum, molinia caerulea, polygonatum multiflorum, glechoma hederacea, prunus avium, convallaria majalis, betula pubescens, lysimachia nemorum, scrophularia nodosa