be, arr. leuven, quercus robur, sambucus nigra, urtica dioica, prunus serotina, quercus rubra, crataegus monogyna, galium aparine, corylus avellana, fraxinus excelsior, populus canadensis, glechoma hederacea, heracleum sphondylium, robinia pseudoacacia, hedera helix, acer pseudoplatanus, lonicera periclymenum, alnus glutinosa, castanea sativa, sorbus aucuparia, betula pendula, arrhenatherum elatius, holcus lanatus, humulus lupulus, cirsium arvense, prunus avium, prunus spinosa, poa trivialis, geum urbanum, ribes rubrum, ranunculus repens, frangula alnus, symphytum officinale, galeopsis tetrahit, amelanchier lamarckii, anthriscus sylvestris, cornus sanguinea, galanthus nivalis, viburnum opulus, ulmus minor, dactylis glomerata, calystegia sepium, rosa canina, alnus incana, silene dioica, ficaria verna, polygonatum multiflorum, rubus caesius, arum maculatum, holcus mollis, filipendula ulmaria