Physocarpus capitatus Rosaceae
Western Ninebark, Pacific Ninebark fi-so-KAR-pus
- Deciduous shrub, to 5-20 ft (1.5-6 m) tall, less width, open, straggly, angled branches, bark exfoliating in long irregular strips. Leaves alternate, simple, 3-10 cm long, palmately 3-5 lobed and veined, lobes pointed, margins doubly serrated, glabrous and somewhat shiny above, stellate-pubescent below; petioles 2-4 cm long. Flowers in late spring, small, 5 white petals, about 30 stamens, 3-5 pistils, in dense, hemispherical clusters (corymbs). Fruit small, inflated follicle, reddish to brown, about 6 mm long.
- Sun to shade, best in acid soil, requires some watering. Propagates easily from cuttings.
- Hardy to USDA Zone 5 Native to from British Columbia south to central California and east to western Montana. Common along stream banks, lake margins, swampy areas and in moist woods.
- capitatus: forming a dense head, the fruit cluster.
- Oregon State Univ. campus: Hort Garden, just south of walkway of concrete pavers.