Boon, R. 2010. Pooley's Trees of eastern South Africa. Flora and Fauna Publications Trust, Durban.
Donaldson, J.S. 1997. Is there a floral parasite mutualism in cycad pollination? The pollination biology of Encephalartos villosus (Zamiaceae). American Journal of Botany 84(10):1398-1406.
Goode, D. 1989. Cycads of Africa. Struik/Winchester, Cape Town.
Goode, D. 2001. Cycads of Africa Volume I. D&E Cycads of Africa, Gallo Manor.
Grobbelaar, N. 2003. Cycads. With special reference to the southern African species. (2nd ed.). Nat Grobbelaar, Pretoria.
Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Osborne, R. 1987. Focus on Encephalartos ghellincki. Encephalartos 12:16-23.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
Scott-Shaw, C.R. 1999. Rare and threatened plants of KwaZulu-Natal and neighbouring regions. KwaZulu-Natal Nature Conservation Service, Pietermaritzburg.
|