Biodiversity is of vital importance to human kind from many point of view. Diversity is essential for proper functioning of food chain in an ecosystem. It is of scientific importance for protecting and maintaining soil and regulating climate. The Indian region with a total area of about 3029 million hectares is listed as ‘Mega diversity’ region in the world and is considered to be one of the twelve centres of origin and diversity of several plant species in the world. Around the world many billions of people still use plants as their primary source of medicine. India also possesses a great heritage of other ancient systems of medicine such as Siddha, Unani and Homeopathy. As many as 4000 plants are collectively mentioned in these early works. The importance of medicinal plants and their traditional use to treats various ailments are well known to many people in Alangulam area. So the medicinal plants also facing various degrees of threats. The present study was documented and quantitative analysed the frequent usage of medicinal plants in Alangulam hillock. The collected plant materials were identified and their medicinal uses are recorded. The plants were documented by herbarium. The area has 195 species comprising of 172 Dicots and 23 Monocots. Among these Compositae and Poacee family species are dominant than other species of plants. Among these more than 113 common medicinal plants were identified and 55 medicinal plants were discussed. In the study area 4 species of peninsular endemic have been identifiedviz. Barleriabuxifolia, Maeruaapetela, Commiphoraberryi and Cyperusrotundus. Effective strategies are to be formulated with an aim to conserve these medicinal plants.
