The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • Christenhusz, M. J. M., J. L. Reveal, A. K. Farjon, M. F. Gardner, R. R. Mill & M. W. Chase. 2011. A new classification and linear sequence of extant gymnosperms. Phytotaxa 19: 55–70.
  • Handbuch des Naturlichen Pflanzensystems 194. 1837. (1-7 Oct 1837) (Handb. Nat. Pfl.-Syst.)
  • Steyn, E. M. A. & G. F. Smith. 1999. Welwitschiaceae. Sp. Pl.: Fl. World 3: 1–8.
  • The Gardeners' Chronicle & Agricultural Gazette 1862: 71. 1862. (Gard. Chron.)


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