Long Leaved Oregon Grape or Berberis nervosa is a perennial shrub of shady woods. The leaves are divided into 15 to 19 leaflets that are dull and have serrated margins without prickly points. Older plants can measure up to 80cm tall. The newest growth on a plant is concentrated in the upper portion and remaining stem is bare. The flowers are borne from within the crown of leaves arranged in an elongated raceme and are yellowish in color. The fruit is a glaucous, blue berry. A distinguishing characteristic of the berberidaceae family, the inner bark or wood is distinctly yellow.
The geographic distribution runs from southern British Columbia to central California, west of the Cascade Mountian range in Washington and Oregon.
Hitchcock, C.L. and A. Cronquist (1994) Flora of the Pacific Northwest, University of Washington Press, Seattle and London.
Kozloff, E.N. (1976) Plants and Animals of the Pacific Northwest. University of Washington Press, Seattle and London.