be, arr. leuven, heracleum sphondylium, galanthus nivalis, castanea sativa, urtica dioica, arum maculatum, fraxinus excelsior, quercus rubra, glechoma hederacea, symphytum officinale, sambucus nigra, acer pseudoplatanus, quercus robur, silene dioica, corylus avellana, galium aparine, ranunculus repens, hedera helix, impatiens glandulifera, arum italicum, robinia pseudoacacia, populus canadensis, alnus glutinosa, filipendula ulmaria, allium ursinum, geranium pyrenaicum, angelica sylvestris, lamium galeobdolon, geranium phaeum, symphoricarpos albus, ribes rubrum, potentilla indica, ficaria verna, primula elatior, heracleum mantegazzianum, humulus lupulus, stachys sylvatica, poa trivialis, circaea lutetiana, cardamine pratensis, geum urbanum, prunus serotina, prunus avium, cirsium oleraceum, hyacinthoides non-scripta, polygonatum multiflorum, viburnum opulus, holcus lanatus, carpinus betulus, crataegus monogyna, cornus sanguinea