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Anacampseros, Avonia & Grahamia
- Rowley, G. 1995. Anacampseros, Avonia & Grahamia: A growers Handbook. British Cactus and Succulent Cociety, England.
Brachystelma
- Allen Dyer, R. 1983. Ceropegia, Brachystelma & Riocreuxia in Southern Africa. A.A. Balkema, Rotterdam.
Ceropegia
- Allen Dyer, R. 1983. Ceropegia, Brachystelma & Riocreuxia in Southern Africa. A.A. Balkema, Rotterdam.
Pelargonium
- Craib, C. 2001. Geophytic Pelargoniums. Umdaus Press, Pretoria.
- Van der Walt, J.J.A. & Ward-Hilhorst, E. 1977. Pelargoniums of Southern Africa, Vol. 1. Purnell, Cape Town.
- Van der Walt, J.J.A., Vorster, P. & Ward-Hilhorst, E. 1981. Pelargoniums of Southern Africa, Vol. 2. Juta, Cape Town.
- Van der Walt, J.J.A., Vorster, P. & Ward-Hilhorts, E. 1988. Pelargoniums of Soutnern Africa, Vol. 3. National Botanic Gardens Kirstenbosch, Cape Town.
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