nl, agglomeratie leiden en bollenstreek, phragmites australis, agrostis stolonifera, persicaria amphibia, elymus repens, ranunculus repens, glyceria maxima, poa trivialis, urtica dioica, spirodela polyrhiza, dactylis glomerata, cirsium arvense, phalaris arundinacea, lolium perenne, ceratophyllum demersum, glechoma hederacea, elodea nuttallii, lemna gibba, lemna trisulca, anthriscus sylvestris, arrhenatherum elatius, stuckenia pectinata, trifolium repens, sparganium erectum, festuca rubra, holcus lanatus, symphytum officinale, equisetum arvense, argentina anserina, poa pratensis, cerastium holosteoides, plantago lanceolata, ranunculus acris, stellaria media, glyceria fluitans, poa annua, calystegia sepium, phleum pratense, heracleum sphondylium, rumex crispus, rumex acetosa, epilobium hirsutum, polygonum aviculare, rumex obtusifolius, ranunculus circinatus, plantago major, galium aparine, alopecurus pratensis, achillea millefolium, carex hirta, trifolium pratense