Distribution: British Columbia south, east of the Cascades, to California, east to Ontario and New York.
Habitat: Wet places, especially around lakes and along streams, form the lowlands to the lower mountains.
Flowers: Late June - August
Conservation Status: Not of concern
Perennial with slender rhizomes tuberous at the nodes, the tubers spindle-shaped, 10 mm. long and 5 mm. thick; stems 3-9 dm. tall.
Leaves alternate, 2-4, the blades terete, with prominent partitions; leaf bases sheathing, the sheaths projecting into rounded auricles 2-3.5 mm. long.
Inflorescence terminal with 3-12 many-flowered heads 10-15 mm. broad, exceeded by the uppermost and involucral bracts; perianth 4.5-5 mm. long, greenish-brown to tawny, the 6 segments narrowly lanceolate-acuminate, the inner 3 often 1 mm. shorter; stamens 6, the anthers shorter than the filaments.
Capsule narrowly conic, tapered from the base into a long beak that slightly exceeds the perianth.