[The Oregon Grapes of the Columbia River Gorge of Oregon and Washington]

Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape

Berberis nervosa

Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus

Flowers of Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus)

The photo above shows a close-up of a single flower of Cascade Oregon grape as seen on the southeastern slopes of Mt. Adams...........May 2005.

Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus)Cascade Oregon grape is a low shrub up to 0.5 meters high as shown in the photo at right. The pinnately compound leaves bear 11-19 spiny-margined leaflets, and the leaves. Photo from the southeastern slopes of Mt. Adams............May 2005.

Characteristics:

Cascade Oregon grape is an attractive shrub, suitable for many northwest gardens. It is a shrub, somewhat fern-like with numerous compound pinnate leaves in a tuft, surrounding the erect stems which contain the flowers and fruit. The stems range from 10-30 cm tall, and the leaves may be as long as 40 cm. The 9-19 leaflets are holly-like, somewhat glossy, and of an ovate-lanceolate shape. They are each from 3-6 cm long and spiny edged, with 12-14 spiny prickles commonly found on each side of the leaflet.

The racemes are at the apex of the central stems, and may be as much as 20 cm long. The outer sepals or bracts are somewhat greenish, from 2-3 mm long, and the inner sepals 6-8 mm long and bright yellow. The bilobed petals are oblong in shape and slightly shorter than the inner sepals. The berries are blue with a whitish bloom and ovoid in shape.


Habitat:

Cascade Oregon grape is found in coniferous forests and in clearcuts.


Range:

Cascade Oregon grape is found west of the Cascades from southern British Columbia to central California.

In the Columbia River Gorge, it may be found east of Troutdale, OR east to approximately the Little White Salmon River. It may be found between the elevations of 100'-4800'.


Leaf of Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus)

The pinnately compound leaves of cascade Oregon grape. Each leaf bears 9-19 spiny-margined leaflets.

Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus) --- Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus)

Cascade Oregon grape as seen along the trail between Angels Rest and the Wahkeena Falls Trail in the Columbia River Gorge.................May 18, 2009.

Ventral leaf surface of Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus) ------ Dorsal leaf surface of Cascade Oregon Grape, Cascade Oregon-grape, Dull Oregongrape, Long-leaved Oregon Grape: Berberis nervosa (Synonyms: Berberis nervosa var. mendocinensis, Mahonia nervosa, Mahonia nervosa var. mendocinensis, Mahonia nervosa var. nervosa, Odostemon nervosus)


Paul Slichter