Page author: David Giblin
Spiraea ×pyramidata
pyramid spiraea
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to south Oregon, east to Idaho and Montana.

Habitat: Somewhat dry forest openings, moderate to mid-elevations in the mountains.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Erect to spreading, deciduous shrubs from rhizomes, 5-12 dm. tall.

Leaves:

Leaf blades ovate-lanceolate to oblong-lanceolate, 2-7 cm. long, crisp-puberulent beneath, from sub-entire to coarsely once or twice serrate above the middle.

Flowers:

Inflorescence a large, obconic panicle, 5-10 cm. broad and 1 to 2 times as long; calyx sparsely hairy, the 5 lobes triangular, 1 mm. long, reflexed; petals 5, pale pink, 2-2.5 cm. long; stamens 25-50.

Fruits:

Follicles leathery, glabrous to pubescent, 2.5-3 mm. long.

Accepted Name:
Spiraea ×pyramidata Greene
Publication: Pittonia 2: 221. 1892.

Synonyms & Misapplications:
Spiraea menziesii Hook. var. pyramidata (Greene) Piper
Spiraea tomentulosa Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Spiraea ×pyramidata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Spiraea ×pyramidata checklist entry.

E-Flora BC: Spiraea ×pyramidata atlas page.

CalPhotos: Spiraea ×pyramidata photos.

USDA Plants: Spiraea ×pyramidata information.

18 photographs:
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