Spiraea douglasii is a species of flowering plant in the rose family native to northwestern North America.

[5] Spiraea douglasii is a woolly shrub growing 0.91–1.83 metres (3–6 feet) tall from rhizomes, forming dense riverside thickets.

Large clusters of small, deep pink flowers form spires in early summer, later turning dark and persisting.

Spirea is shade-intolerant, and therefore grows primarily in open marshes among sedges, horsetails, wild blueberries, and other swamp flora,[6] as well as in seral communities.

[3] The flowers provide nectar for hummingbirds, and small birds eat the seeds which persist into the winter when food is less plentiful.