Distribution: Occurring along the coast in Washington; Alaska south to Oregon, east across Canada to the Atlantic coast; circumpolar.
Habitat: Salt marshes.
Conservation Status: Review Group 1 in Washington (WANHP)
Glabrous, spreading perennial, the stems freely rooting, up to 2.5 dm. long.
Leaves opposite, all cauline, sessile, somewhat fleshy, lanceolate and pointed to linear and blunt, 8-15 mm. long.
Flowers axillary on stout pedicels 5-15 mm. long; sepals 5, lanceolate, 3.5-5 mm. long; petals 5, white, slightly longer than the sepals.
Capsule ovoid, equal to the sepals.