english: Swordleaf rush; Sword-leaved rush; Three-stamened rush.
Region: western North America, Japan, Russia.
Botany: habitat wet areas;rhizomatous perennial her; stems ± 40 cm high; leaves flat, curving, basal; inflorescence is an array of many rounded clusters of many flowers; flowers with dark brown to black tepals; three small stamens enclosed; fruit an oblong capsule with a small beak on the tip.