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