Distribution: Occurring west of the Cascades crest along the coast; Vancouver Island, B.C., south to Monterey, California.
Habitat: Coastal shorelines and sand dunes.
Conservation Status: Not of concern
Low, spreading shrub-like perennial here in Washington - typically less than 30 cm., though can get up to 100 cm. tall in some parts of its range.
Alternate, simple, narrow, 1-2 cm long, with prominent midrib.
Small pinkish or whitish, 5-6 mm long, with 5 parts; in small clusters along stem.
Shiny black achenes 4-5 mm long.
Can be separated from other Polygonum species by its perennial decumbent stems, lacerate hyaline stipules, axillary flower clusters, and coastal habitat.