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