Cabrera (1976) distinguishes two areas in the Puna regarding their vegetation cover.One in the southwest that he calls "desert" where precipitation reaches its lowest regional records (less than 50 mm per year).The Puna is known for the salars, which occupy the bottoms of valleys and elevated basins.It is also called "desert of debris”.The Project is located between the 50 and 100 mm isohietes.