Synopsis The present title is the unsightful compilation offering a comprehensive account of the fundamental principles of physiology of angiosperms. It incorporates and organizes the information concerning plant physiology from relevant and authentic sources. It is an humble attempt to present a connected and precise account of the subject matter of this important branch of botany which forms an integral part of the studies undertaken by the undergraduate and postgraduate students of the subject. The principles have been outlined in considerable detail along with the fundamental facts and theories that explain the life processes of plants. It is a compilation work and embodies a fairly comprehensive treatment of the fundamental facts and aspects of morphology and anatomy. The purpose of this title is to provide students an authoritative and up-to-date text in a very simple way, easy to grasp by those who do not have strong background of this subject. The present text provides a background of facts, terminology and internal structure of common plants around us and may safely be used as laboratory guide. Much emphasis has been given on the anatomical study of angiosperms. Ecological aspects have also been dealt with in sufficient details.