be, arr. leuven, fraxinus excelsior, corylus avellana, quercus robur, acer pseudoplatanus, sambucus nigra, hedera helix, lonicera periclymenum, polygonatum multiflorum, glechoma hederacea, geum urbanum, arum maculatum, circaea lutetiana, sorbus aucuparia, alnus glutinosa, anemone nemorosa, ficaria verna, adoxa moschatellina, urtica dioica, prunus avium, primula elatior, ribes rubrum, crataegus monogyna, athyrium filix-femina, carpinus betulus, galium aparine, lamium galeobdolon, silene dioica, viburnum opulus, ulmus minor, populus canadensis, filipendula ulmaria, stachys sylvatica, dryopteris carthusiana, fagus sylvatica, poa trivialis, geranium robertianum, quercus rubra, carex sylvatica, deschampsia cespitosa, angelica sylvestris, paris quadrifolia, moehringia trinervia, cornus sanguinea, prunus serotina, prunus padus, humulus lupulus, dryopteris dilatata, dryopteris filix-mas, betula pendula, castanea sativa