be, arr. leuven, oxalis corniculata, silene coronaria, pilosella aurantiaca, potentilla indica, viola wittrockiana, phytolacca acinosa, galinsoga quadriradiata, lathyrus latifolius, geranium macrorrhizum, castanea sativa, lepidium didymum, quercus rubra, claytonia perfoliata, prunus serotina, erigeron sumatrensis, echinochloa crus-galli, cymbalaria muralis, geranium pyrenaicum, rhododendron ponticum, erigeron canadensis, oxalis stricta, veronica persica, juncus tenuis, papaver somniferum, setaria helvola, pentaglottis sempervirens, quercus robur, lepidium virginicum, amelanchier lamarckii, pinus sylvestris, melilotus albus, epilobium ciliatum, muscari armeniacum, oenothera glazioviana, lunaria annua, eschscholzia californica, vicia villosa, sorbus aucuparia, arum italicum, euphorbia lathyris, digitaria sanguinalis, matricaria discoidea, nicandra physalodes, robinia pseudoacacia, symphoricarpos albus, euphorbia maculata, datura stramonium, betula pendula, rubus laciniatus, verbena bonariensis