Distribution: Widely distributed on both sides of the Cascades in Washington; circumboreal; widely distributed throughout North America.
Habitat: Moist places, from sea level to high elevations in the mountains.
Conservation Status: Not of concern
Perennial herbs from slender, creeping rhizomes, the numerous, branched stems 0.5-6 dm. long, slender, weak and scrambling on other vegetation, the square stems glabrous or scabrous on the angles.
Leaves in whorls of 4, or occasionally 5 or 6, sessile, linear to narrowly elliptic, blunt, 1-nerved, 5-20 mm. long.
Peduncles numerous, 1- to 3-flowered, axillary or terminal, commonly 2-3 together at the ends of short, axillary branches; calyx obsolete; corolla rotate, whitish, 1-1.5 mm. wide, the 3 or 4 lobes much longer than the tube; ovary 2-celled, inferior.
Fruit dry, the 2 segments divergent and nearly distinct at maturity, glabrous, 1-1.75 mm. thick.