Burke: Berberis nervosa vs. Berberis

	Berberis nervosa	Berberis
		barberry, mahonia, Oregon-grape
Habit	Low, evergreen shrubs generally 0.1-0.3 m, occasionally taller; glabrous, brown to yellow-brown bark.
Leaves	Leaves alternate, pinnately-compound, leathery; leaflets 9-21, glossy to somewhat dull and glaucous, lance-ovate to ovate, 3-8 cm long and 1-5 cm broad, 4-6 veins from base, somewhat dull and glaucous, 6-13 spine-tipped teeth.
Flowers	Inflorescences dense racemes, 6-17 cm long with 30-70 flowers; bracts 3, greenish-yellow, 2-3 mm long; sepals 6, yellow, 6-8 mm long; petals 6, yellow, bi-lobed; stamens 6, opposite of petals; pair of lateral teeth absent from filaments; style none, stigma sessile.
Fruits	Berries blue, glaucous, juicy, solid, oblong-ovoid to globose, 8-11 mm.

	Berberis nervosa	Berberis
Flowering time	April-May
Habitat	Generally in light woodland and forest edge.
Distribution	Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to western Montana. [WildflowerSearch map]	[BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	B. darwinii, B. julianae, B. thunbergii, B. vulgaris
Subordinate taxa		B. darwinii, B. julianae, B. thunbergii, B. vulgaris
Web links	Local floras: BC, CA, OR Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Berberis nervosa

Berberis

barberry, mahonia, Oregon-grape

Habit

Low, evergreen shrubs generally 0.1-0.3 m, occasionally taller; glabrous, brown to yellow-brown bark.

Leaves

Leaves alternate, pinnately-compound, leathery;

leaflets 9-21, glossy to somewhat dull and glaucous, lance-ovate to ovate, 3-8 cm long and 1-5 cm broad, 4-6 veins from base, somewhat dull and glaucous, 6-13 spine-tipped teeth.

Flowers

Inflorescences dense racemes, 6-17 cm long with 30-70 flowers;

bracts 3, greenish-yellow, 2-3 mm long;

sepals 6, yellow, 6-8 mm long;

petals 6, yellow, bi-lobed;

stamens 6, opposite of petals; pair of lateral teeth absent from filaments;

style none, stigma sessile.

Fruits

Berries blue, glaucous, juicy, solid, oblong-ovoid to globose, 8-11 mm.