Sepals are long, ovate, obtuse, velvety. C. 1 Article Resources Article resources Diabetes and dietary supplements. What is Gymnema? Gymnema sylvestre is a woody, climbing plant, which grows in the tropical forests of central and southern India. General uses The plant has been used in traditional medicine, most notably to control blood sugar. Tamil. The useful plants of India. Possible side effects of Gymnema. ^ a b Duke, James A., ed.