General:
Low shrub, 30-100 cm tall, from a creeping rhizome; stems erect to spreading, with thin wiry branches, usually fine-hairy above, but especially among the flowers.

Leaves:
Alternate, deciduous, short-stalked, narrowly egg-shaped to lance-oblong, 2-9 cm long, usually coarsely toothed above the middle, smooth to short-hairy, at least beneath.

Flowers:
Inflorescence a branched, dense, broadly conic, terminal cluster of numerous small flowers, the cluster 1 to 2 times as long as broad, the branches usually fine-hairy; corollas pale pink to whitish, the petals 5, circular, 2-2.5 mm long; calyces sparsely hairy on the outside, 5-lobed, the lobes triangular, bent back, about 1 mm long; ovaries superior; stamens numerous.

Fruits:
Follicles, fine-hairy to smooth.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Spiraea pyramidata Greene