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