2’-3’. Oregon Grape (Mahonia spp.) Dull Oregon-grape is a small shrub that like its close relative - tall Oregon-grape - produces yellow flowers and blue berries. Description Oregon Grape is the state flower of Oregon, best known for its production of blue-black berries which somewhat resemble clusters of grapes. The flowers are highly aromatic, and, like all Mahonias, the autumn display is spectacular, with burgundy, red, gold and bronze. It has emerald green, windmill-like leaves and canary yellow spring flowers that are followed by waxy blue berries in fall. Foraging and Identifying Oregon Grape. Part sun/full shade. GPP Award. It is in the barberry family and has spiny leaves similar to hollies. Mahonia Nervosa Dull Oregon Grape. It does not have a well defined shape and often forms scraggly clumps. Evergreen shrub/ground cover, slow growing, to 2 ft (60 cm), stoloniferous. 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. A handsome, evergreen, ground-covering shrub native to the Pacific Northwest. Evergreen shrub. Morphology: Oregon Grape is an evergreen shrub which can grow to a height of 7’-10’ and up to 5’ wide. A guide to eco-friendly lawns and gardens in Metro Vancouver 2′ x 4′ Oregon grape is an evergreen shrub/ground cover that is slow growing and only reaches about 2 feet (60 cm.) Mahonia nervosa (Pursh) Nutt. The berries are a great food source for birds and mammals during the summer and fall. Cascade Oregon grape plant (Mahonia nervosa) goes by several names: longleaf mahonia, cascade mahonia, dwarf Oregon grape, cascade barberry, and dull Oregon grape. It is sometimes called Oregon grape-holly, although it’s not a grape or a holly! The flowers are yellow and quite fragrant which attracts pollinators during the spring. 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. Most commonly the plant is simply referred to as Oregon grape. dull Oregon-grape (Cascade barberry) Berberidaceae (Barberry family) Introduction to Vascular Plants mendocinesis J. Ht. Birds (6) eat fruit, Butterfly adult, Butterfly larvae, Mason bees. Berberis nervosa Pursh. Tolerates seasonal wet. 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 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. is native to Oregon (hence the name) and other western states. Dull Oregon Grape, Mahonia nervosa. 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