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