E-Flora BC: Electronic Atlas of the Flora of British Columbia

Berberis nervosa
dull Oregon-grape
Berberidaceae (Barberry family)

Introduction to Vascular Plants

Distribution of Berberis nervosa
Click here to view our interactive map and legend

Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Illustration Source: The Illustrated Flora of British Columbia

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.

Source: The Illustrated Flora of British Columbia

Key to the Species and Taxonomic Notes

Taxonomic Key to Mahonia

1. Leaflets usually 9-19, palmately nerved.....................................M. nervosa

1. Leaflets usually 3-11, pinnately nerved

2. Leaves more than twice as long as broad, mostly with 12-29 prominent spiny teeth; leaflets 5-11; plants 0.5-4.5 m tall.......................M. aquifolium

2. Leaves less than twice as long as broad, with 15-43 inconspicuous, spiny teeth; leaflets 3-7; plant 0.1--.6 m tall.........................M. repens

Habitat / 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.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Berberis 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
Site Information	Minimum	Average	Maximum
Elevation (metres)	0	369	1470
Slope Gradient (%)	0	22	240
Aspect (degrees) [0 - N; 90 - E; 180 - S; 270 - W]	0	220	360
Soil Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric]	0	3	8
Modal Nutrient Regime Class	C
Number 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)
Source: Klinkenberg 2020

Status Information

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Native	S5	Yellow	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Synonyms and Alternate Names

Mahonia nervosa (Pursh) Nutt.

Taxonomic and Nomenclatural Links

Flora North America treatment for Berberidaceae
Flora North America treatment for Berberis nervosa
Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2025-01-26 12:12:16 AM ]

Disclaimer: The information contained in the E-Flora atlas pages is derived from expert sources as cited in each section. This information is scientifically based. E-Flora also acts as a portal to other sites via deep links. As always, users should refer to the original sources for complete information. E-Flora BC is not responsible for the accuracy or completeness of the original information.