Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.

Habitat: Shores, swales, seeps, and ditches.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind

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.