Dictionary of the common names of plants with list of foreign plants cultivated in the open - Marloth, R. (Rudolf), 1855 -1931 (Specialty Press of South Africa, 1917)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1906)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1906)

A plant ecology survey of the Tugela river basin, Natal - Edwards, Denzil (1967)