Comprehensive Description
provided by North American Flora
Filipendula occidentalis (S. Wats.) Howell, Fl. NW. Am
1 : 185. 1898.
Spiraea occidentalis S. Wats. Proc. Am. Acad. 18 : 192. 1883.
Stem 1-2 m. high, simple, nearly terete, straw-colored, glabrous below, pubescent above ; leaves pinnately divided, with a large terminal division and small lateral ones, more or less hairy on both sides, especially on the veins; terminal segment cordate or reniform, 1-1.5 dm. broad, digitately 3-7-cleft with ovate, acute, double -serrate lobes ; lateral segments 1-2 pairs, ovate to lanceolate, 5-10 mm. long, toothed ; inflorescence flat-topped ; "Sepals lanceolate, 2 mm. long, acute; petals elliptic or oval, almost clawless, white, about 6 mm. long; achenes long-stipitate, the stipes almost equaling the bodies, the latter linear-lanceolate, ciliate on the margins and more or less hairy on the sides ; styles slender, straight.
Type locality : Rocky banks of the Trask River, Tillamoak County, Oregon. Distribution: Western Oregon.
- 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
