Distribution: Alaska to California, east to Alberta, South Dakota and New Mexico
Habitat: Wet places along streams and lakes, mid- to high elevations in the mountains
Flowers: July - September
Conservation Status: Not of concern
Rhizomatous perennial, the stems clustered, somewhat flattened, 1-2.5 dm. tall.
Leaves alternate, the stem leaves 1-4, the blades semi-terete, with prominent partitions; leaf bases sheathing, the sheathes projecting into rounded or acute, membranous auricles 1-2 mm. long.
Flowers numerous in a terminal, capitate cluster up to 2 cm. broad, the involucral bract shorter to much longer than the head; perianth 3-4 mm. long, the 6 segments dark brown, narrowly lanceolate and somewhat awl-shaped; stamens 6, the anthers shorter than the filaments.
Capsule about equal to the perianth, cylindric-obovoid, abruptly truncate.