Burke: Physocarpus capitatus

	Physocarpus capitatus
	Pacific ninebark
Habit	Spreading to erect shrub 2-4 m. tall, the branches angled, usually glabrous.
Leaves	Leaves alternate, petiolate, the blades ovate to cordate, 3-5 lobed, the lobes bi-serrate, 4-8 cm. long and broad, dark green and glabrous above and paler below, with stellate hairs.
Flowers	Flowers rather numerous in terminal clusters; calyx hemispheric, with stellate hairs, the 5 lobes ovate-lanceolate, 3 mm. long, somewhat reflexed; petals 5, white, sub-orbicular, 4 mm. long, spreading; stamens about 30, equaling the petals; pistils 3-5, attached to each other only at the base, mostly glabrous.
Fruits	Fruit a glabrous follicle, 7-11 mm. long, swollen.

	Physocarpus capitatus
Flowering time	May-June
Habitat	Moist woods and swamps in the lower mountains.
Distribution	Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Idaho. [WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Not of concern
Sibling taxa	P. malvaceus
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Physocarpus capitatus

Pacific ninebark

Habit

Spreading to erect shrub 2-4 m. tall, the branches angled, usually glabrous.

Leaves

Leaves alternate, petiolate, the blades ovate to cordate, 3-5 lobed, the lobes bi-serrate, 4-8 cm. long and broad, dark green and glabrous above and paler below, with stellate hairs.

Flowers

Flowers rather numerous in terminal clusters;

calyx hemispheric, with stellate hairs, the 5 lobes ovate-lanceolate, 3 mm. long, somewhat reflexed;

petals 5, white, sub-orbicular, 4 mm. long, spreading;

stamens about 30, equaling the petals;

pistils 3-5, attached to each other only at the base, mostly glabrous.

Fruits

Fruit a glabrous follicle, 7-11 mm. long, swollen.