Berberis nervosa
Berberis haematocarpa
Cascade Oregon-grape, dull Oregon-grape, dwarf Oregon-grape, Oregon grape
algerita, red barberry, red fruit mahonia
monomorphic, without short axillary shoots.
± dimorphic, with elongate primary and short or somewhat elongate axillary shoots.
of 2d-year stems brown or yellow-brown, glabrous.
of 2d-year stems grayish purple, glabrous.
9-21-foliolate;
petioles 2-11 cm.
3-9-foliolate;
petioles 0.1-0.5 cm.
blades thin and ± flexible;
surfaces abaxially rather dull, smooth, adaxially dull, somewhat glaucous;
terminal leaflet stalked, blade 2.9-8.4 × 1.2-4.8 cm, 1.8-3.2 times as long as wide;
lateral leaflet blades lance-ovate to ovate, 4-6-veined from base, base rounded to cordate, margins plane, toothed, each with 6-13 teeth 1-2(-3) mm tipped with spines to 1-2.4 × 0.1-0.2 mm, apex acute or broadly acuminate.
blades thick and rigid;
surfaces abaxially dull, papillose, adaxially dull, glaucous;
terminal leaflet stalked in most leaves, blade 1.5-3.8 × 0.5-1.1 cm, 2-5 times as long as wide;
lateral leaflet blades oblong-ovate to ovate or lanceolate, 1(-3)-veined from base, base acute to obtuse, rarely subtruncate, margins undulate or crispate, toothed or lobed, with 2-4 teeth 1-4 mm high tipped with spines to 1.2-2 × 0.2-0.3 mm, apex narrowly acute or acuminate.
absent.
absent.
racemose, dense, 30-70-flowered, 6-17 cm;
bracteoles membranous, apex acute, obtuse, or rounded.
racemose, lax, 3-7-flowered, 1.5–4.5 cm;
bracteoles membranous, apex acuminate.
anther filaments without distal pair of recurved lateral teeth.
anther filaments without distal pair of recurved lateral teeth.
blue, glaucous, oblong-ovoid or globose, 8-11 mm, juicy, solid.
purplish red, glaucous, spheric or short-ellipsoid, 5-8 mm, juicy, solid.
scales (13-)20-44 mm, persistent.
scales 2-4 mm, deciduous.
= 56.
Berberis nervosa
Berberis haematocarpa
Plants of Berberis nervosa are usually very low (commonly 0.1-0.3 m), but occasional plants may be considerably taller (to 2 m). One such population from north of Westport, California, has been separated as B. nervosa var. mendocinensis. Similar populations occur sporadically throughout the range of B. nervosa, so the form should not be recognized taxonomically.
Berberis nervosa is resistant to infection by Puccinia graminis.
The Skagit tribe used Berberis nervosa medicinally in a root preparation to treat venereal disease (D. E. Moermann 1986).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Typical populations of Berberis haematocarpa (with narrowly ovate or lanceolate leaflets and small, juicy, deep red berries) and B. fremontii (with ovate or orbiculate leaflets and large, dry, inflated, yellowish or brownish berries) are easily distinguished. These characteristics are not always well correlated, however, and intermediate populations, showing different combinations of leaflet shape and berry size, color, and inflation, are known.
Berberis haematocarpa is susceptible to infection by Puccinia graminis.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria 
WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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