P.  Jansen, ?Notes on Malaysian grasses - 1?, Reinwardtia, vol. 2, pp. 225-350, 1953.

H. B.  Gilliland, Grasses of Malaya.  Vol III of Burkhill,HM, A revised Flora of Malaya. Singapore: Government Printing Office, 1971, p. 319 and 36 plates.