Osservazioni ecologiche sulla distribuzione diLithophyllum lichenoidesPhilippi (Corallinales, Rhodophyta) nelle isole della Sardegna settentrionale

The abundance ofLithophyllum lichenoidesand the presence of the «encorbellements» or rilevant dimension induced to define the distribution of these populations, in the framework of research on the main natural features of North Sardinia. Some remarks about the ecology of this species in relation to hydrodinamisme and exposition have been made.