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