This species with a wide Eurasian distribution is present in all regions of Italy with the exception of Liguria, Piedmont, Valle d'Aosta and Trentino-Alto Adige. It grows in marshes and wet meadows, usually on substrates that are rich in calcium, below the montane belt. The species is common in the central and intermediate belts of the Sardinian temporary ponds. The whole plant is poisonous for the presence of neuro- and enterotoxic active principles (oenanthetoxines). The genus name derives from the Greek 'oinos' (wine) and 'anthos' (flower), as when ingested in small doses the plant causes mental changes similar to drunkenness; the species name refers to the tubular stems. Flowering period: May to July.

Italian name(s): Cabbasisi d'acqua (Sicilia), Cugghiudiri (Sicilia, Mirto), Enante fistolosa (Italia), Finocchio acquatico fistoloso (Italia), Finocchio acquatico tubuloso (Italia), Finocchio salvatico (Toscana).