Taxonomy is one of the oldest biological disciplines. This book presents an account of general principles and aims of taxonomy in a comprehensive manner. It has been written mainly to cater the needs of undergraduate students pursuing courses in Botany/Life Sciences/Plant Sciences, but it will be useful for postgraduate students of these disciplines as well. The book gives a critical account of the important systems of classification and salient features of the APG II (Angiosperm Phylogeny Group, 2003) system of plant taxonomy. It mentions the important rules of plant nomenclature, and various codes of nomenclature including the latest Vienna Code of 2006. Further, it discusses the usefulness of anatomy, embryology, palynology, chemistry, cytology and ecology under current trends in plant taxonomy. A thorough coverage of profusely illustrated 50 important dicotyledonous and monocotyledonous angiospermic families is the hallmark of this book. Each family is described covering the following points: Distribution, vegetative features, floral description, morphological nature of organs, further classification, affinities with other families, economic importance and description of common plant(s). Finally, the book covers the different aspects and theories related to the origin of angiosperms, and elucidates the methods and techniques of herbarium development and maintenance. KEY FEATURES: Presents a key to families described in the book. Provides a pro forma for the description of angiosperms. Includes a glossary of important technical terms. Lists the important Herbaria of India and the world.