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