Albizia lebbeck is among the most important tree species imported many years ago from India and well adapted to the harsh environmental conditions of the central part of Saudi Arabia.Reviewing the current literature for the importance of the plant A. lebbeck growing worldwide revealed many biological interests, but nothing was reported concerning the species cultivated in Saudi Arabia. This book contains valuable information about the phytochemistry of the flowers growing in Saudi Arabia in addition to results of important biological screening tests done on them.