In smaller pool located in the fen, that collects raising groundwater, can be found two carnivorous aquatic species: Utricularia minor and Utricularia australis, along with musk Scorpidium scorpioides. In biggest pools, in addition to utricularia, can be found Nymphaea alba and the rare alismatacea Baldellia ranunculoides, whose inflorescences are composed by few rose flowers.
These little pools of low deep water have become a rare habitat because the water table lowering and the accumulation of vegetal material leads to a progressive silting up.
The water emerging through the various surfacing once roamed freely on fens before gather in watercourses. Many of the streams arising from the source areas have been replaced by canals and ditches with small slope and depth that recreate conditions almost natural. In the stretches where through the bottom raise the water table, can still find Cladium mariscus, accompanied by large carici as Carex riparia, Carex pseudocyperus and Sparganium erectum.
In streams with slow current and low deep water we can find a luxuriant vegetation consisting ofunderwater rooted plants with emerging leaves and flowers, among which are particularly widespread Myosotis palustris, Cardamine amara, Nasturtium officinale, Veronica beccabunga, Mentha aquatica, Veronica anagallis-aquatica, Lythrum salicaria and the most showy Caltha palustris and Iris pseudacorus. Often the surface of still water is covered by dense stands of lentil water (Lemna minor). In deeper streams, over the species previously mentioned, can be found Schoenoplectus lacustris and Typha latifolia.
In the central part of greater discharge watercourses, where the current is stronger, there are the so-called neofite, with a strong differentiation among the leaves: those floating are more expanded, while the submerged leaves are thread-like. The species most typical of this environment are Ranunculus trichophyllus and Berula erecta, accompanied by several species of the genus Potamogeton.