References for Berberidaceae
Ahrendt, L.W.A. 1961. Berberis and Mahonia. A taxonomic revision. J. Linn. Soc. 57:1-410.
Fukuda, I. 1967. The biosystematics of Achlys. Taxon 16:308-316.
Taylor, S.T. 1972. The genus Mahonia Nutt. in British Columbia. Davidsonia 3:39-43.
Williams, M.P. 1993. Berberidaceae. In J.C. Hickman, ed. The Jepson manual: higher plants of California. Univ. Calif. Press, Los Angeles, CA. 1400pp.

Source for the Reference Lists

George W. Douglas, Del Meidinger and Jim Pojar. 1998-2002. Illustrated Flora of British Columbia.