Importance of Ethnobotany
(i) It provides traditional uses of plant.
(ii) It gives information about certain unknown and known useful plants.
(iii) The Ethnomedicinal data will serve as a useful source of information for the chemists, pharmacologists and practitioners of herbal medicine.
(iv) Tribal communities utilize Ethnomedicinal plant parts like bark, stem, roots, leaves, flower bud, flowers, fruits, seeds, oils, resins, dyes, gum for the treatment of diseases like diarrhoea, fever, headache, diabetes, jaundice, snakebites, leprosy, etc.

He is the "Father of Indian Paleobotany" (1891- 1949). He presented his research on two different areas of Paleobotany:
(i) The anatomy and morphology of Paleozoic Ferns.
(ii) The fossil plants of the Indian Gondwana Formations.

Paleobotany is derived from Greek words paleon that means "old" and botany the study of plants. It is the branch of Paleontology that deals with recovery and identification or plant remains of geological past.

It was given by Ernst Haeckel. According to this theory, ontogeny recapitulates Phylogeny. The stages of development of the individual animal repeats the evolutionary history of the entire race of the animal.

Vermiform appendix, Nictitating membrane, Caudal Vertebra and Coccyx.