1. Mabberly, D. J. 1990.The Plant Book., 215–261. London: Cambridge University Press.
2. Hutchinson, J. 1959.The Families of Flowering Plants., Vol. 2, 303London: University Press.
3. Hutchinson, J. and Dalziel, J. M. 1958.Flora of West Tropical Africa., Vol. 1, 589London: Crown Agents Millbank.
4. Dassanajake, M. D. 1981.A Revised Handbook to the Flora of Ceylon., Vol. 2, 403–405. Washington, DC: Amerind Publ. Co.