The best, most comprehensive and highly informative flora on the identification of medicinal and economical plants that contains about 1800 plants species. The main objectives of this Flora are (1) to provide in a book of workable size with the names of identifying the numerous species (2) to give and up-to nomenclature of the plant species (3) to stimulate further research of plants in the different areas, (4) to induce the study of nature and the concept of conservation. 167 families have been given with detailed description of Families, Genera and species in semi-technical, simple and lucid language. The families arranged according to the classification of Bentham and Hookers system of classification and enlargement of the families is according to the Engler and Prantl's and Hutchinson's system of classification. The plants identifying with the help of several floras and the Herbarium of F.R.I. Dehradun, B.S.I. Dehradun. B.S.I. Allahabad and C.N.H. Calcutta. I hope that this book will serve the students in both ways that is in plant identification and to know the medicinal plants.