Synopsis The present publication is the outcome of extensive botanical surveys and first hand field knowledge of the author gained during the course of over 2 decades from various biogeographic zones of the country. The scope of the present publication lies in highlighting the diverse floral resources, distribution of vegetation types and the enormous floristic diversity occurring in 12 biogeographic zones in India. The numerous colour and black and white photographs of the vegetation types and of unique floral elements have further enhanced the value of this work. The long list of endangered species appended at the end of the book is indicative of the extent of destruction of the biodiversity in the country and calls for conserted efforts to protect the existing biodiversity. The book is comprehensive in its scope and is the first of its kind on the subject and fulfils the long felt need of all floristic botanists, foresters, conservation biologists, biogeographers and others interested in biodiversity studies.