Omayed Biosphere Reserve has a peculiar landscape of alternating ridges and depressions that extends along a 20 km N-S transect and ending by a vast inland plateau. This book deals with the ecology and vegetation of Omayed Biosphere Reserve which is an ideal site to represent the Mediterranean Desert ecosystems in Egypt. Its flora approximates 30% of the total flora of the Egyptian Mediterranean region (the richest phytogeographical region in Egypt).