nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, lolium perenne, ranunculus repens, poa trivialis, trifolium repens, elymus repens, holcus lanatus, stellaria media, poa annua, cerastium holosteoides, ranunculus acris, alopecurus geniculatus, cirsium arvense, dactylis glomerata, rumex acetosa, polygonum aviculare, phalaris arundinacea, glyceria fluitans, plantago major, persicaria amphibia, urtica dioica, poa pratensis, glechoma hederacea, ranunculus sceleratus, phleum pratense, phragmites australis, capsella bursa-pastoris, bellis perennis, alopecurus pratensis, glyceria maxima, argentina anserina, ceratophyllum demersum, bromus hordeaceus, cardamine pratensis, spirodela polyrhiza, bolboschoenus maritimus, lemna trisulca, eleocharis palustris, rumex obtusifolius, lemna gibba, rumex crispus, festuca rubra, stuckenia pectinata, elodea nuttallii, scorzoneroides autumnalis, sparganium erectum, persicaria hydropiper, butomus umbellatus, plantago lanceolata, trifolium pratense