Ethnobotanical survey of medicinal plants commonly used by Kani tribals in Tirunelveli hills of Western Ghats, India

ETHNOPHARMACOLOGICAL RELEVANCE: For thousands of years, medicinal plants have played an important role throughout the world in treating and preventing a variety of diseases. Kani tribal people in Tirunelveli hills still depend on medicinal plants and most of them have a general knowledge of medicinal plants which are used for first aid remedies, to treat cough, cold, fever, headache, poisonous bites and some simple ailments. AIM OF THE STUDY: The present study was initiated with an aim to identify traditional healers who are practicing herbal medicine among the Kani tribals in Tirunelveli hills of Western Ghats, India and quantitatively document their indigenous knowledge on the utilization of medicinal plants particularly most common ethnomedicinal plants. METHODS: Field study was carried out over a period of 4 years in Tirunelveli hills. The ethnomedicinal information was collected through interviews among the Kani traditional healers. The collected data were analyzed through use value (UV), informant consensus factor (Fᵢc), fidelity level (FL) and relative importance (RI). RESULTS: A total of 90 species of plants distributed in 83 genera belonging to 52 families were identified as commonly used ethnomedicinal plants by the Kani traditional healers in Tirunelveli hills for the treatment of 65 types of ailments. These ailments were categorized into 15 ailment categories based on the body systems treated. Leaves were the most frequently used plant parts and most of the medicines were prepared in the form of paste and administered orally. Fᵢc values of the present study indicated that there was a high agreement in the use of plants in the treatment of jaundice and diabetes among the users. Dermatological infections/diseases and gastro-intestinal disorders had highest use-reports and 29 species of plants had the highest fidelity level of 100%. The most important species according to their use value were Gymneme sylvestre (2.00), Melia azedarach, Murraya koenigii, Syzygium cumini and Terminalia chebula (1.83). CONCLUSION: As a result of the present study we can recommend the plants Alpinia galanga, Azadirachta indica, Calophyllum inophyllum, Gymnema sylvestre, Leucas aspera, M. azedarach, Mollugo nudicaulis, Ocimum tenuiflorum, S. cumini, T. chebula and Tribulus terrestris (with high UV and RI values), Bambusa arundinacea, Datura metel, Evolvulus nummularius, Opuntia dillenii and Physalis minima (newly reported claims with highest FL) for further ethnopharmacological studies for the discovery of potential new drugs.