THE quest for good health and immortality has been a continuous human endeavour since the beginning of civilisation throughout the world. Plants have been used as a source of medicine by men from ancient times. Initially, these formed the bulk of folk or ethnomedicine, practised in India and some other parts of the world. Later, a considerable part of this indigenous knowledge was formulated, documented and eventually passed into the organised systems of medicine, such as Ayurveda, Unani, Sidha or some other systems outside India. Subsequently, with the advance in techniques of phytochemistry and pharmacology, a number of active principles of medicinal plants were isolated and introduced as valuable drugs in modern medicine. The second revised and enlarged edition of book, Medicinal Plants : Utilisation and Conservation, contains 24 chapters covering holistic information on medicinal plants. Four new chapters added includes articles on �Medicinal plant solutions to Asthmatic Problems, Biotechnological advances in some Ethnomedicinal plant species; Catharanthus roseus a potential drug source for cancer chemotherapy and Biotechnological interventions and role of secondary metabolites in defense mechanism of plants. Book contains articles on cultivation and propagation of medicinal plants, medicinal pteridophytes, Diseases of medicinal & aromatic plants, Herbal based contraceptive research, Plants with antioxidative properties in radio-protection, IPR, and Growth & competitiveness of Indian pharmaceutical industries. Second revised & enlarged edition of book update the first edition besides adding four new chapters. Book will be useful to practiners of medicines, farmers, researchers in botany, pharmacologists and students.