Page author: David Giblin
Spiraea douglasii
WTU specimens
Other herbaria

Distribution: Alaska to California, east to Idaho; more common west of the Cascades

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

Flowers: June - August

Origin: Native

Conservation Status: Not of concern


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.

Synonyms & Misapplications:
(none provided)
var. douglasii – Douglas' spiraea
var. menziesii – Menzies' spiraea
var. roseata – western hardhack, Douglas' spiraea, rose spiraea
Additional Resources:

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

WA Flora Checklist: Spiraea douglasii checklist entry.

E-Flora BC: Spiraea douglasii atlas page.

CalPhotos: Spiraea douglasii photos.

USDA Plants: Spiraea douglasii information.

51 photographs:
Group by