These volume will serve as a guide and will be of immense interest to the research workers in the field of Indian Muscology. Throughout the book the text is intelligent, clear, interesting and unambiguous. In this volume, the author has initiated a study of the moss species so far reported from Eastern India, supplemented by his own findings. New description of certain plant types, classifications have been added to enrich the book. The illustrations of plant families and their sectional diagrams have also been enlarged or reduced for better understanding and presentation.