



The alluvial terraces bordering Calavon are colonised by herbaceous plants including the rare and protected Sand bassia. This steppe species of sandy areas seems to keep up in France only in the Vaucluse, especially in the Calavon between Apt and Robion (15 known sites of the 19 in France). Here, just below the path, a program for the reinforcement and the monitoring of its populations is implemented on the grounds of the Luberon Regional Nature Park.