Mahonia nervosa (Pursh) Nutt.
dull Oregon-grape (Cascade barberry)
Berberidaceae (Barberry family)

Introduction to Vascular Plants

Photograph

© Lydia Dani     (Photo ID #79570)


Map

E-Flora BC Static Map

Distribution of Mahonia nervosa
Click here to view the full interactive map and legend

Species Information

General:
Evergreen shrub from a rhizome; stems branched, erect, 10-60 cm tall, leafy; bark and wood yellowish.
Leaves:
Evergreen, hollylike, turning reddish in the fall, alternate, pinnate; leaflets 9-19, palmately nerved, with spiny teeth.
Flowers:
Inflorescence of clustered racemes up to 20 cm long; flowers yellow, the segments in 6's.
Fruits:
Clustered berries 8-11 mm in diameter, blue, glaucous, with a few large seeds, edible.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Blue
Present from Spring to Summer
Source:  The USDA

Ecology

Ecological Framework for Mahonia nervosa

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
369 0 1470
Slope Gradient (%)
22 0 240

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

220 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 8
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
1251
Modal BEC Zone Class
CWH

All BEC Zones (# of stations/zone) species was recorded in

CDF(196), CWH(823), ESSF(5), ICH(45), IDF(81), MS(2), PP(3), SBS(14)

Habitat and Range

Mesic to dry open slopes and open forests in the lowland, steppe and montane zones; common in SW BC, infrequent eastward in S BC; S to CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Berberis nervosa Pursh
Berberis nervosa var. mendocinensis J.B. Roof
Mahonia nervosa var. mendocinensis (J.B. Roof) J.B. Roof
Odostemon nervosus (Pursh) Rydb.