Accepted By:
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Munz, P. A. 1974. Fl. S. Calif. 1–1086. University of California Press, Berkeley.
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Munz, P. A. & D. D. Keck. 1959. Cal. Fl. 1–1681. University of California Press, Berkeley.
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Shreve, F. & I. L. Wiggins. 1964. Veg. Fl. Sonoran Desert 2 vols. Stanford University Press, Stanford.
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