L.  Watson, Dallwitz, M., and Johnston, C. R., ?Grass genera of the World: 728 deetailed descriptions from an automated database?, Australian Journal of Botany, vol. 34, pp. 223-230, 1986.

L.  Watson and Dallwitz, M. J., Grass Genera of the World. Wallingford: C.A.B. International, 1992.