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