The Ayurvedic Pharmacopoeia of India is the legal document of standards for the quality of drugs, substances and preparations included therein (under the Drugs & Cosmetics Act, 1940). This 3rd Volume consists of 100 monographs of single drugs of plant origin. Pharmacognostical, chemical and ayurvedic, standards of the parts of the plants used in Ayurveda are described in detail in each monograph. One monograph is exclusively devoted to the one part of the drug of plant origin which describes the macroscopic, microscopic characters alongwith their chemical standards on the protocol developed and designed by Ayurvedic Pharmacopoeia Committee. It deals in detail about the permissible limits of foreign matter, total ash, acid insoluble ash, alcohol soluble extractive, water soluble extractive and chromatographic pattern of TLC. All this work was carried out in Pharmacopoeial Laboratory for Indian Medicine (PLIM), Ghaziabad. The data has been finalized after confirmation of various samples obtained from different agroclimatic conditions by the cross-section of experienced scientists in Ayurvedic Pharmacopoeia Committee after careful scientific scrutiny. These standards have been consciously kept modest so that its implementation by the manufacturing companies becomes easily acceptable in order to maintain their quality control and avoid batch-to-batch variations. Ayurvedic pharmacological properties like Rasa, Guna, Virya, Vipaka, Karma etc. are also mentioned in each monograph alongwith their therapeutic uses, some of the important classical formulations and therapeutic dose. Appendix of this volume contains the details of the protocols used in determination of various scientific standards. References of ancient Ayurvedic literature in its original form are an added attraction in order to authenticate the Ayurvedic statements made in each and every monograph. In the end English equivalents of Ayurvedic terms have been given to make the volume more useful for the people who are not conversant with Sanskrit/Ayurvedic terminologies. In general, this book is more user friendly for scientists involved in drug quality testings of Ayurveda medicines, teachers of Dravyaguna, research scholars, physicians, students of Ayurveda and many other who have interest in Ayurvedic medicines.