nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, ranunculus repens, trifolium repens, lolium perenne, poa trivialis, holcus lanatus, poa annua, alopecurus geniculatus, stellaria media, elymus repens, ranunculus acris, glyceria fluitans, dactylis glomerata, rumex acetosa, phleum pratense, cirsium arvense, phalaris arundinacea, juncus articulatus, cerastium holosteoides, eleocharis palustris, plantago major, alopecurus pratensis, polygonum aviculare, poa pratensis, cardamine pratensis, ranunculus sceleratus, persicaria amphibia, persicaria hydropiper, oenanthe fistulosa, bellis perennis, glyceria maxima, argentina anserina, myosotis scorpioides, capsella bursa-pastoris, rumex obtusifolius, glechoma hederacea, carex hirta, triglochin palustris, bromus hordeaceus, bolboschoenus maritimus, rumex crispus, stellaria alsine, urtica dioica, sparganium erectum, festuca rubra, ceratophyllum demersum, galium palustre, apium nodiflorum, lemna trisulca, elodea nuttallii