This Pharmacognosy textbook comprises 12 chapters, with a focus on the medicinal uses of various naturally derived drugs. It covers the occurrence, distribution, isolation, and identification tests of natural drug substances and common phytoconstituents, emphasising their therapeutic activity and pharmaceutical applications. The book also explores the biological sources, chemical constituents of prescribed crude drugs, and their therapeutic efficacy in addressing common diseases and ailments. Additionally, it discusses fundamental concepts in quality control of crude drugs, various systems of medicine, and the utilisation of herbs in health foods and cosmetics. The textbook provides insights into the brief history, development, scope, and future prospects of pharmacognosy. The in-depth coverage aims to assist Diploma Pharmacy students in identifying crucial natural crude drugs, describing the uses of herbs in nutraceuticals and cosmeceuticals, discussing principles of alternative medicine systems, and understanding the importance of quality control in drugs of natural origin. This is an authentic VALLABH PRAKASHAN book by Vallabh Originals.