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

References

  • Cactus Journal [London] 2: 50. 1899. (Cact. J. (London))
  • Shreve, F. & I. L. Wiggins. 1964. Veg. Fl. Sonoran Des. 2 vols. Stanford University Press, Stanford.

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