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