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