Bayer, M.B. 1982. The new Haworthia handbook. National Botanical Gardens of South Africa.
Bayer, M.B. 1999. Haworthia Revisited: A revision of the genus. Umdaus Press, Hatfield.
Craib, C. 1990. Some rare Haworthias in South Africa. Aloe 27:23-26.
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Pilbeam, J.W. 1983. Haworthia and Astroloba, a collector's guide. B.T. Batsford Ltd., London.
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.
Rowley, G.D. 2013. Generic concepts in the Alooideae. Part 3 - The phylogenetic story. Alsterworthia International Special Issue 10:1-6.
Scott, C.L. 1985. The genus Haworthia, a taxonomic revision. Aloe Books, Johannesburg.
Victor, J.E. and Dold, A.P. 2003. Threatened plants of the Albany Centre of Floristic Endemism, South Africa. South African Journal of Science 99:437-446.
|