nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, trifolium repens, ranunculus repens, poa trivialis, alopecurus geniculatus, lolium perenne, elymus repens, stellaria media, holcus lanatus, poa annua, glyceria fluitans, ranunculus sceleratus, eleocharis palustris, cerastium holosteoides, rumex acetosa, ranunculus acris, persicaria amphibia, cardamine pratensis, bolboschoenus maritimus, persicaria hydropiper, cirsium arvense, polygonum aviculare, juncus articulatus, phalaris arundinacea, phleum pratense, plantago major, oenanthe fistulosa, poa pratensis, argentina anserina, bellis perennis, ceratophyllum demersum, lemna trisulca, glyceria maxima, myosotis scorpioides, alopecurus pratensis, butomus umbellatus, dactylis glomerata, elodea nuttallii, triglochin palustris, stuckenia pectinata, bromus hordeaceus, sparganium erectum, spirodela polyrhiza, capsella bursa-pastoris, potamogeton pusillus, phragmites australis, rumex crispus, ranunculus circinatus, scorzoneroides autumnalis, carex hirta