We are living in an age of science where man reached to moon and has made remarkable achievements in various scientific spheres. There are revolutionary changes being taking place in are almost all the countries world wide due to globalization and liberalization. For the last few years students of Botany have demanded a complete and well-balanced taxt book in systematic Botany. Now this demand is answered to fulfill the requirements of plant lovers. The books gives the diversity of plants, history of classification, distinguishing characters of all natural orders, keys of families and generas and description of plants with their botanical name and its availibity is given. In writing this book, I have consulted some of the well-known works on flora and I have thus to thank all authers of general and local floras of India and other countries.