nl, agglomeratie leiden en bollenstreek, agrostis stolonifera, ranunculus repens, lolium perenne, trifolium repens, poa annua, poa trivialis, elymus repens, phragmites australis, cirsium arvense, polygonum aviculare, stellaria media, bolboschoenus maritimus, stuckenia pectinata, plantago major, persicaria amphibia, dactylis glomerata, alopecurus geniculatus, capsella bursa-pastoris, argentina anserina, holcus lanatus, ranunculus sceleratus, urtica dioica, rumex crispus, cerastium holosteoides, elodea nuttallii, poa pratensis, ceratophyllum demersum, lemna trisulca, spirodela polyrhiza, lemna gibba, glyceria fluitans, phleum pratense, glyceria maxima, matricaria chamomilla, potamogeton pusillus, zannichellia palustris, phalaris arundinacea, ranunculus acris, bromus hordeaceus, ranunculus circinatus, bellis perennis, equisetum arvense, sparganium erectum, atriplex prostrata, matricaria discoidea, plantago lanceolata, glechoma hederacea, myriophyllum spicatum, trifolium pratense, carex hirta