The biotope includes the northern shore of the lake of Idro which hosts, on the muddy and sandy deposits, some associations of Cryptogams, Algae, Mosses, Epatic plants (Riccio cavernosae-Physcomitrelletum) and Phanerogams (Eleocharitetum acicularis). The biotope hosts also reed thickets (Phragmitetum australis) and sedge fields (Caricetum gracilis, Caricetum elatae, etc.). On this very shore, a tributary river flows into the lake, crosses the alluvial plain and shapes a valley where you can find vast sedge fields.