nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, lolium perenne, ranunculus repens, trifolium repens, poa trivialis, elymus repens, poa annua, dactylis glomerata, stellaria media, ranunculus acris, holcus lanatus, urtica dioica, cirsium arvense, plantago major, polygonum aviculare, glechoma hederacea, phalaris arundinacea, persicaria amphibia, capsella bursa-pastoris, glyceria fluitans, cerastium holosteoides, rumex acetosa, glyceria maxima, bellis perennis, poa pratensis, phleum pratense, alopecurus geniculatus, rumex obtusifolius, argentina anserina, alopecurus pratensis, anthriscus sylvestris, spirodela polyrhiza, ceratophyllum demersum, ranunculus sceleratus, heracleum sphondylium, lemna trisulca, plantago lanceolata, lemna gibba, sparganium erectum, trifolium pratense, lamium album, phragmites australis, rumex crispus, elodea nuttallii, matricaria discoidea, cardamine pratensis, festuca rubra, arrhenatherum elatius, achillea millefolium, butomus umbellatus