R. M.  Harley and Paton, A., ?Lamiales Newsletter?, Lamiales Newsletter, pp. 1?21, 1997.

R. M.  Harley and Paucar, A. G., ?List of species of tropical American Clinopodium (Labiatae), with new combinations?, Kew Bulletin, vol. 55, pp. 917?927, 2000.

R. M.  Harley, Paton, A., and Harvey, T., ?Lamiales Newsletter?, Lamiales Newsletter, pp. 1?13, 1998.

R. M.  Harley and Paton, A., ?Lamiales Newsletter?, Lamiales Newsletter, pp. 1?12, 1994.