Berberis fremontii is an evergreen shrub native to mountainous regions of the US states of Arizona, Nevada, California, Colorado, New Mexico and Utah. It reaches a height of up to 3 m, and has pinnate leaves of 3-9 leaflets. Flowers are pale yellow, fruits ellipsoid and dull reddish-purple. The plant was named in honor of John C. Fremont.
- Tropicos Berberis fremontii
- Laferriere, J.E. Berberidaceae, Barberry Family. Journal of the Arizona-Nevada Academy of Science 26:2-4. 1992.
- Flora of North America, vol 3
- Loconte, H., & J. R. Estes. 1989. Phylogenetic systematics of Berberidaceae and Ranunculales (Magnoliidae). Systematic Botany 14:565-579.
- Marroquín, Jorge S., & Joseph E. Laferrière. 1997. Transfer of specific and infraspecific taxa from Mahonia to Berberis. Journal of the Arizona-Nevada Academy of Science 30(1):53-55.
- Laferrière, Joseph E. 1997a. Transfer of specific and infraspecific taxa from Mahonia to Berberis. Bot. Zhurn. 82(9):96-99.
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