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