nl, agglomeratie leiden en bollenstreek, lolium perenne, agrostis stolonifera, ranunculus repens, trifolium repens, poa trivialis, elymus repens, dactylis glomerata, stellaria media, poa annua, holcus lanatus, ranunculus acris, cirsium arvense, polygonum aviculare, persicaria amphibia, phalaris arundinacea, poa pratensis, rumex acetosa, phleum pratense, glechoma hederacea, capsella bursa-pastoris, cerastium holosteoides, urtica dioica, plantago major, alopecurus pratensis, rumex obtusifolius, alopecurus geniculatus, glyceria fluitans, glyceria maxima, argentina anserina, bellis perennis, bromus hordeaceus, rumex crispus, festuca rubra, ranunculus sceleratus, trifolium pratense, plantago lanceolata, persicaria hydropiper, matricaria discoidea, spirodela polyrhiza, anthriscus sylvestris, arrhenatherum elatius, elodea nuttallii, sparganium erectum, carex hirta, lamium album, lemna gibba, scorzoneroides autumnalis, heracleum sphondylium, cardamine pratensis, achillea millefolium