nl, agglomeratie leiden en bollenstreek, poa annua, agrostis stolonifera, ranunculus repens, lolium perenne, poa trivialis, stellaria media, elymus repens, trifolium repens, polygonum aviculare, cirsium arvense, capsella bursa-pastoris, plantago major, dactylis glomerata, alopecurus geniculatus, holcus lanatus, persicaria amphibia, cerastium holosteoides, phleum pratense, rumex crispus, poa pratensis, ranunculus sceleratus, urtica dioica, rumex obtusifolius, phalaris arundinacea, glyceria fluitans, persicaria hydropiper, bromus hordeaceus, ranunculus acris, chenopodium album, argentina anserina, matricaria discoidea, persicaria maculosa, phragmites australis, rumex acetosa, alopecurus pratensis, glyceria maxima, glechoma hederacea, matricaria chamomilla, senecio vulgaris, solanum nigrum, bellis perennis, plantago lanceolata, achillea millefolium, sparganium erectum, equisetum arvense, trifolium pratense, bolboschoenus maritimus, sonchus asper, elodea nuttallii, spirodela polyrhiza