Bibiography:  Reference Listing
for the Ephedraceae

Cutler, H. C. 1939. Monograph of the North American species of the genus Ephedra. Annals of the Missouri Botanical Garden 26:373-429.

Steeves, M.A. and E.S. Barghoorn. 1959. The pollen of Ephedra J. Arnold Arbor. 40:221-259.

Stevenson, D.W. 1993. Ephedraceae. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 2:428-434 Oxford Univ. Press, New York and Oxford.

Wendt, T. 1993. A new variety of Ephedra torreyana (Ephedraceae) from West Texas and Chihuahua, with notes on hybridization in the E. torreyana complex. Phytologia 74(2):141-150.