Page authors: Don Knoke, David Giblin
Spiraea douglasii
Douglas's spiraea, hardhack steeplebush

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana and Colorado.

Habitat: Swamps, lake margins and damp meadows, from sea level to the subalpine.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies


Erect, deciduous, freely-branching shrub 1-2 m. tall, the young growth somewhat woolly, the older bark brown.


Leaf blades oblong-elliptic to oblong-obovate, 4-10 cm. long, dark green and glabrous above, much paler and woolly beneath, remotely serrate on the upper half.


Inflorescence an elongate panicle, 6-20 cm. long, several times as long as broad, oblong to conic; calyx finely woolly, the 5 lobes triangular, reflexed, 1 mm. long; petals pink to deep rose, obovate, 1.5-2 mm. long; stamens 25-50, the filaments pink.


Follicles shiny, glabrous, leathery, 2.5-3 mm. long.

Accepted Name:
Spiraea douglasii Hook.
Publication: Fl. Bor.-Amer. (Hooker) 1(4): 172. 1832.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Spiraea douglasii in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Spiraea douglasii checklist entry

OregonFlora: Spiraea douglasii information

E-Flora BC: Spiraea douglasii atlas page

CalPhotos: Spiraea douglasii photos

56 photographs:
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