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General:
Perennial herb from tough, extensive rhizomes; stems erect, simple, hard, pithy, 100-200 cm tall.
Leaves:
Sheaths lobed at the top, the lobes ear-like, membranous, veined; blades convex on the outer surface, 5-10 (12) mm wide.
Flowers:
Inflorescence a densely crowded, terminal, cylindrical spike; female and male portions of the spikes separated by 0.5-8 cm; the female portion below, brown, 15-20 cm wide, the male portion above, slightly wider than the female; female flowers subtended by a linear bract, the bract swollen at the top; stigmas linear; pollen grains single.
Fruits:
Follicles, dry, dehiscent, ellipsoid, long-hairy, about 1 mm long.
Source: The Illustrated Flora of British Columbia
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