Native to stream sides and moist woods from Mendocino County, California north to Alaska. A bold and showy perennial looking like a giant astilbe. Forms dense clumps of finely divided foliage with arching, feathery plumes of white flowers 3-5 ft. tall in summer. Requires regular moisture and part shade where it makes a striking specimen or accent plant in the woodland garden. Dies back to its roots in winter. The frothy flower plumes attract an array of tiny little pollinators and the seed heads on female plants are an important food source for birds. Said to be deer resistant.