Dull Oregon-grape

Mahonia nervosa

''Mahonia nervosa'', commonly known as dwarf Oregon-grape, Cascade barberry, Cascade Oregon-grape, or dull Oregon-grape, is a flowering plant native to the northwest coast of North America from southern British Columbia south to central California, with an isolated population inland in northern Idaho. It is especially common in second growth, Douglas-fir or western redcedar forests, making use of those pools of sunlight that intermittently reach the ground.

Some authors place the entire genus ''Mahonia'' within the genus ''Berberis''.

The plant was collected by Lewis and Clark during their famous expedition to the West before being described for science in 1813.
A Closer Look! Interesting to see the colour of the unopened flowers. Canada,Dull Oregon-grape,Dwarf Oregon-grape,Geotagged,Mahonia nervosa,Spring

Appearance

It is an evergreen shrub with short vertical stems, mostly under 30 cm , while the leaves reach higher, rarely up to 2 m tall. The leaves are compound, with 9-19 leaflets; each leaflet is strongly toothed, reminiscent of holly, and somewhat shiny, but less so than tall Oregon-grape. The leaflets do not have a single central vein as in that species, but several veins arranged fan-like, branched from the leaflet base, hence the epithet ''nervosa''. The flowers and fruit are like those of other Oregon-grapes, and are equally bitter-tasting.
The Flowers and Leaves of the Drawf Oregon-grape. The flowers and leaves together are quite colourful. Canada,Dull Oregon-grape,Dwarf Oregon-grape,Geotagged,Mahonia nervosa,Spring

Uses

Some Plateau Indian tribes drank an infusion of the root to treat rheumatism.

References:

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Taxonomy
KingdomPlantae
DivisionAngiosperms
ClassEudicots
OrderRanunculales
FamilyBerberidaceae
GenusMahonia
SpeciesM. nervosa