be, arr. tongeren, corylus avellana, fraxinus excelsior, quercus robur, acer pseudoplatanus, lonicera periclymenum, hedera helix, polygonatum multiflorum, arum maculatum, betula pubescens, prunus avium, sambucus nigra, anemone nemorosa, carpinus betulus, primula elatior, sorbus aucuparia, fagus sylvatica, circaea lutetiana, adoxa moschatellina, geum urbanum, lamium galeobdolon, crataegus monogyna, carex sylvatica, betula pendula, hyacinthoides non-scripta, dryopteris filix-mas, athyrium filix-femina, ficaria verna, dryopteris carthusiana, urtica dioica, glechoma hederacea, mercurialis perennis, cornus sanguinea, paris quadrifolia, viburnum opulus, galium aparine, castanea sativa, alnus glutinosa, milium effusum, ulmus minor, ajuga reptans, dryopteris dilatata, deschampsia cespitosa, pteridium aquilinum, viola riviniana, luzula pilosa, ribes rubrum, moehringia trinervia, geranium robertianum, silene dioica, oxalis acetosella