nl, agglomeratie leiden en bollenstreek, lolium perenne, ranunculus repens, agrostis stolonifera, poa trivialis, trifolium repens, holcus lanatus, stellaria media, ranunculus acris, elymus repens, poa annua, rumex acetosa, dactylis glomerata, alopecurus geniculatus, alopecurus pratensis, phalaris arundinacea, persicaria amphibia, glyceria fluitans, cerastium holosteoides, phleum pratense, glechoma hederacea, bellis perennis, cirsium arvense, glyceria maxima, cardamine pratensis, poa pratensis, polygonum aviculare, bromus hordeaceus, capsella bursa-pastoris, plantago major, rumex obtusifolius, persicaria hydropiper, argentina anserina, myosotis scorpioides, urtica dioica, ranunculus sceleratus, festuca rubra, rumex crispus, juncus articulatus, oenanthe fistulosa, trifolium pratense, lolium pratense, spirodela polyrhiza, plantago lanceolata, rorippa amphibia, galium palustre, anthoxanthum odoratum, elodea nuttallii, agrostis capillaris, lemna trisulca, eleocharis palustris