The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
References
- Flora of North America Editorial Committee, e. 2003. Magnoliophyta: Caryophyllidae, part 1. 4: i–xxiv, 1–559. In Fl. N. Amer. Oxford University Press, New York.
- Gonçalves, M.L. (1978) Cactaceae FZ 4
- Leistner, O.A. (ed.) (2000) Seed plants of southern Africa: families and genera Strelitzia 10
- P. G. Howes, The Giant Cactus Forest and Its World: A Brief Biology of the Giant Cactus Forest of Our American Southwest (Duell, Sloan, and Pearce, New York; Little, Brown, Boston; 1954), from pp. 222-239, from p. 227.
- Stevens, W. D., C. U. U., A. Pool & O. M. Montiel. 2001. Flora de Nicaragua. Monogr. Syst. Bot. Missouri Bot. Gard. 85: i–xlii, 1–2666.
- Tributsch, H. 1984. How life learned to live. Cambridge, MA: The MIT Press. 218 p.
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