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