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