Densely tufted herb; rhizome covered by broad resinous leaf bases. Leaves linear-ensiform, 20-70 cm long, flat or biconvex, striate, pubescent near base only; margins pubescent to tomentose near base, distally glabrescent. Scape 20-50 cm long, pubescent to velvety, clasped by 1 reduced leaf. Spathes lanceolate, 3-6.3 cm long, prominently veined, sparsely white-silky to velvety, blackish. Involucre 11-15 mm wide; inner bracts slightly exserted. Tube 2-3 cm long, pubescent to tomentose. Sepals obovate, 2.5-3.5 cm long, 2-3 cm wide, violet. Petals lanceolate. Filaments 4-5 mm long, completely connate. Ovary pubescent. Capsule ovoid-cylindrical, 2-3 cm long. Seeds globose-angular, c. 4 mm diam., wrinkled, with large pit, black; aril absent.
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