J. K.  Morton, ?New names in Plectranthus (Lamiaceae) and allied genera from the Ethiopian region?, Novon, vol. 8, pp. 265?266, 1998.

P. D.  CANTINO and Doroszenko, A., ?Obtegomeria (Lamiaceae), a new genus from South America?, Novon, vol. 8, pp. 1?3, 1998.

A.  Pool, ?A New Combination in Clinopodium (Lamiaceae) from Mesoamerica and Cuba?, Novon, vol. 18, pp. 508?510, 2008.