O.  Stapf, ?Gramineae?, in Flora of Tropical Africa, vol. 9, D.  Prain, Ed. London: , 1917.

O.  Stapf, ?Gramineae?, in Flora Capensis, vol. 7, W. T.  Thiselton-Dyer, Ed. Kent: Reeve & Co, 1900, pp. 594-636.