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