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