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

References

  • Abrams, L. 1923. Ferns to Birthworts. 1: 1–557. In L. Abrams Ill. Fl. Pacific States. Stanford University Press, Stanford.
  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Ca. nat. México. CONABIO, Mexico City.
  • Eckenwalder, J. E. 1977. North American cottonwoods (Populus, Salicaceae) of sections Abaso and Aigeros. J. Arnold Arbor. 58(3): 193–208.
  • Flora of North America Editorial Committee, e. 2010. Magnoliophyta: Salicaceae to Brassicaceae. 7: i–xxii, 1–797. In Fl. N. Amer. Oxford University Press, New York.
  • Isotype: Sargent, C. S. 1919. Bot. Gaz. 67: 211.
  • Kearney, T. H. & R. H. Peebles. 1960. Arizona Fl. (ed. 2) 1032 pp.
  • Munz, P. A. 1974. Fl. S. Calif. 1–1086. University of California Press, Berkeley.
  • SPECIMEN BASED RECORD. Published protolog data.
  • Shreve, F. & I. L. Wiggins. 1964. Veg. Fl. Sonoran Des. 2 vols. Stanford University Press, Stanford.

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