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