W. D.  Clayton and Renvoize, S. A., ?Genera Graminum -  Grasses of the World?, Kew Bulletin Additional Series, vol. 2, pp. 1-196, 1986.

W. D.  Clayton, ?Miscellaneous notes on panicoid grasses?, Kew Bulletin, vol. 42, pp. 401-403, 1987.

W. D.  Clayton, ?Studies in the Gramineae XIV. Paniceae and Arundineae (Phragmites)?, Kew Bulletin, vol. 21, pp. 111-117, 1967.

W. D.  Clayton, ?A revision of the genus Hyparrhenia?, Kew Bulletin Additional Series, vol. 2, pp. 1-196, 1969.