2’-3’. Cascade Oregon Grape is an excellent understory plant in partially shaded areas. Evergreen shrub. Dull Oregon-grape is a small shrub that like its close relative - tall Oregon-grape - produces yellow flowers and blue berries. It is sometimes called Oregon grape-holly, although it’s not a grape or a holly! Mahonia nervosa (Pursh) Nutt. Dull Oregon-grape tends to spread lower, rarely over two feet, and can also be used as a ground cover in filtered shade. Most commonly the plant is simply referred to as Oregon grape. Foraging and Identifying Oregon Grape. Oregon grape is a fairly easy plant to grow and cultivate and makes a great garden or restoration plant, especially for shady areas under trees. The berries are a great food source for birds and mammals during the summer and fall. A handsome, evergreen, ground-covering shrub native to the Pacific Northwest. B. Oregon grape is an evergreen shrub/ground cover that is slow growing and only reaches about 2 feet (60 cm.) Birds (6) eat fruit, Butterfly adult, Butterfly larvae, Mason bees. The flowers are highly aromatic, and, like all Mahonias, the autumn display is spectacular, with burgundy, red, gold and bronze. It does not have a well defined shape and often forms scraggly clumps. It has emerald green, windmill-like leaves and canary yellow spring flowers that are followed by waxy blue berries in fall. Part sun/full shade. Leaves, long (30-45 cm) clustered at stem tips, pinnately compound, 11-21 leaflets, each 2.5-9.5 cm long, bristle-toothed, glossy green, may show purple in winter. Evergreen shrub/ground cover, slow growing, to 2 ft (60 cm), stoloniferous. Tolerates seasonal wet. is native to Oregon (hence the name) and other western states. Most effective planted enmass. Dull Oregon Grape, Mahonia nervosa. Oregon Grape (Mahonia spp.) It is in the barberry family and has spiny leaves similar to hollies. Ht. Mahonia Nervosa Dull Oregon Grape. Description Oregon Grape is the state flower of Oregon, best known for its production of blue-black berries which somewhat resemble clusters of grapes. Morphology: Oregon Grape is an evergreen shrub which can grow to a height of 7’-10’ and up to 5’ wide. The dull Oregon-grape is shorter and grows in a variety of forest conditions ranging from dry to fairly moist and at low to middle elevations in the southern coast region. Roof [102,103] NRCS PLANT CODE : MANE2 COMMON NAMES : Cascade barberry Cascades Oregon-grape Cascades mahonia dwarf Oregon-grape dull Oregon-grape longleaf mahonia TAXONOMY : The scientific name of Cascade barberry is Berberis nervosa Pursh. dull Oregon-grape (Cascade barberry) Berberidaceae (Barberry family) Introduction to Vascular Plants mendocinesis J. Both Oregon-grapes can also be found in different habitats, Dull Oregon-grape is more commonly found in more moist open or closed forests at lower and mid-level elevations. 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