be, arr. tongeren, quercus robur, corylus avellana, fraxinus excelsior, lonicera periclymenum, betula pubescens, hedera helix, betula pendula, crataegus monogyna, sorbus aucuparia, acer pseudoplatanus, polygonatum multiflorum, frangula alnus, cornus sanguinea, prunus avium, viburnum opulus, sambucus nigra, primula elatior, angelica sylvestris, urtica dioica, glechoma hederacea, carpinus betulus, geum urbanum, arum maculatum, alnus glutinosa, holcus lanatus, heracleum sphondylium, galium aparine, circaea lutetiana, anemone nemorosa, poa trivialis, filipendula ulmaria, populus tremula, fagus sylvatica, dryopteris carthusiana, cirsium palustre, athyrium filix-femina, salix caprea, castanea sativa, ribes rubrum, ranunculus repens, dryopteris filix-mas, adoxa moschatellina, carex sylvatica, neottia ovata, ajuga reptans, lamium galeobdolon, geranium robertianum, teucrium scorodonia, pteridium aquilinum, ulmus minor