be, arr. leuven, oxalis corniculata, pilosella aurantiaca, silene coronaria, claytonia perfoliata, phytolacca acinosa, galinsoga quadriradiata, potentilla indica, lepidium didymum, viola wittrockiana, echinochloa crus-galli, lathyrus latifolius, castanea sativa, prunus serotina, quercus rubra, quercus robur, erigeron sumatrensis, setaria helvola, geranium macrorrhizum, phacelia tanacetifolia, geranium pyrenaicum, molinia caerulea, nicandra physalodes, amelanchier lamarckii, trifolium incarnatum, papaver somniferum, lepidium virginicum, erigeron canadensis, oxalis stricta, veronica persica, matricaria discoidea, rhododendron ponticum, cymbalaria muralis, calluna vulgaris, euphorbia lathyris, datura stramonium, centaurea cyanus, pentaglottis sempervirens, holcus lanatus, fagopyrum esculentum, betula pendula, tanacetum parthenium, gnaphalium uliginosum, pinus sylvestris, melilotus albus, agrostis capillaris, galinsoga parviflora, juncus tenuis, sorbus aucuparia, eschscholzia californica, digitaria sanguinalis