Desert is too often synonymous with emptiness, with absence. A deserted village, a deserted island, a deserted corner, these are designations of places without men, without palpable life, without future. It is necessary to break this image which makes of any desert place a place deprived of organic existence, bringing back to the only mineral world its tangible reality. It is necessary to insist on the "productivity" of the desert, its fodder and animal productivity in particular. The desert is a place where production is fleeting, extensive, quantitatively modest and random. But it exists. And this little book bears witness to this desert productivity, to this pastoral biodiversity and to the remarkable adaptability of plant life to these extreme conditions.plant life. The author describes here with an encyclopedist's precision the floristic richness of a world that we tend too easily to consider as uniform. However, we can see through the meticulous description of all these plants, their chemical composition, their pastoral potential, that behind the apparent monotony of the desert landscape lies a diversity of ecosystems.Bernard FAYEVeterinarian-Zootechnician