Herb forming dense clumps. Rhizome with numerous swollen, tuber-like joints near soil level. Leaves linear, 5-16 cm long, 1-3 mm wide, bifacial, keeled, equitant near apex, soon withering; margins pilose to glabrous. Scape 20-33 cm long, deeply grooved, tomentose at base, obscurely papillose to glabrous distally, remaining green for a year or more after flowering. Spathes lanceolate, 1.5-2.5 cm long, veined, glabrous, green; margin scarious, brown-streaked. Involucre 6-16 mm wide, gaping; inner bracts exposed. Tube c. 1.5 cm long, glabrous. Sepals obovate, 2-2.5 cm long, to 2 cm wide, pale violet. Petals minute. Filaments c. 2 mm long, completely connate. Ovary glabrous. Capsule ovoid, 1-1.5 cm long. Seeds ovoid, 3 mm long, papillose, dark brown; aril minute.
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