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