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