It is a work of approach on a particular ecosystem, not very difficult, that of the green spaces in the hot zones, arid even hyperarid. The latter contain a formidable wealth of adapted, hardy and very useful species on the ornamental, health and environmental level.The idea of presenting this guide, is essential, because this kind of work has shown each time its effectiveness, not only among gene researchers, explorers of the plant world, but also to people passionate about nature, especially exotic plants and their decorative virtues. In fact, this guide has an importance to know, classify and identify these plant species through these arid areas see herparideThe idea of this book is based on the request of some professional people (foresters, landscapers, ecologists ... etc.) on the one hand and on the search for quality green spaces on the other hand in the study area where the culture of beautification is booming.