Also known as Red Twig Dogwood, this deciduous shrub can grow up to 20 feet tall and spread 20 feet wide. Its lower branches grow along the ground and can root into the ground, creating large thickets. Usually found growing in moist sites, often along streams, lakes and swamps throughout Washington and the Western U.S. from low valley-bottoms up to timberline. Tolerates shade but prefers sun. Important species for forage for deer, elk and moose in the winter as well as for stabilizing the soil. Birds use its berries for food and for nesting in. Popular ornamental species for its red stems and white cluster flowers.
Plant Guide - https://plants.sc.egov.usda.gov/plantguide/pdf/cs_cose16.pdf