Berberis angustifolia is a shrub in the family Berberidaceae, first described as a species in 1840.Hartweg, Karl Theodor. 1840. Plantas Hartwegianas imprimis Mexicanas by George Bentham, p 34 in LatinFedde, Friedrich Karl Georg. 1901. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 31: 91 descriptions in Latin, commentary in German
This is an uncommon species, endemic to Mexico within the State of Hidalgo.Standley, Paul Carpenter. 1920. Contributions from the United States National Herbarium 23(2): 272 in English
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