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