be, arr. leuven, quercus robur, prunus serotina, quercus rubra, agrostis capillaris, holcus lanatus, arrhenatherum elatius, silene coronaria, castanea sativa, betula pendula, sorbus aucuparia, ranunculus repens, amelanchier lamarckii, rumex acetosa, tanacetum vulgare, holcus mollis, pilosella aurantiaca, pinus sylvestris, frangula alnus, juncus effusus, claytonia perfoliata, achillea millefolium, lonicera periclymenum, urtica dioica, stellaria graminea, rumex angiocarpus, plantago lanceolata, heracleum sphondylium, anthoxanthum odoratum, hypericum perforatum, rumex acetosella, populus canadensis, poa trivialis, molinia caerulea, lolium perenne, galinsoga quadriradiata, festuca rubra, galeopsis tetrahit, lathyrus latifolius, robinia pseudoacacia, hypochaeris radicata, juncus tenuis, cirsium arvense, potentilla indica, avenella flexuosa, calluna vulgaris, cytisus scoparius, dactylis glomerata, sambucus nigra, cerastium fontanum, deschampsia flexuosa