Comprehensive Description

provided by North American Flora
Spiraea pyramidata Greene, Pittonia 2 : 221. 1892
A shrub, 3-10 dm. high ; bark of the twigs chestnut-brown and more or less pubescent, exfoliating sooner or later; petioles 2-5 mm. long, puberulent; leaf-blades oval, usually acute at each end, coarsely and doubly serrate above, entire at the base, 3-9 cm. long, somewhat paler beneath ; inflorescence paniculate, short-conic or ovoid ; branches more or less hairy; hypanthium hemispheric, less than 1 mm. deep, hairy; sepals ovate, acute, reflexed, hairy; petals white, rounded-obovate, about 2 mm. long; follicles glabrous, oblanceolate, about 3 mm. long; seeds linear-lanceolate, attenuate at each end, about 2 mm. long. By some regarded as a hybrid between S. luctda and S. Menziesii.
Type locality : Dry woods of the lower Yakima River, near Clealum, Washington. Distribution : Along streams and in wet places, from British Columbia to Oregon and Idaho.
bibliographic citation
Frederick Vernon Coville, Nathaniel Lord Britton, Henry Allan Gleason, John Kunkel Small, Charles Louis Pollard, Per Axel Rydberg. 1908. GROSSULARIACEAE, PLATANACEAE, CROSSOSOMATACEAE, CONNARACEAE, CALYCANTHACEAE, and ROSACEAE (pars). North American flora. vol 22(3). New York Botanical Garden, New York, NY
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