1 Economic Plants, and Arid and Semi-Arid Lands of the World.- 2 The Arid and Semi-Arid Environments of the World.- 3 Arid and Semi-arid Regions and Ecosystems of the World.- 4 Ecophysiology, Nitrogen-Fixation and Plant Stress.- 5 Water Stress.- 6 Temperature Stress.- 7 Salt Stress.- 8 Photosynthesis.- 9 Plant Metabolites.- 10 Anatomical and Morphological Adaptations.- 11 Selected Arid Land Plants: Their Ecophysiology and Uses.- References.- Taxonomic Indices.- Botanical Index.- Zoological Index.