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