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