Rhizome subterete, 1.3--2 cm thick. Leaves 2--5-tufted; petiole 3--10 cm; leaf blade lorate, 60--100 × 1.5--3.5 cm. Scape 2--5.5 cm; bracts 4 or 5. Flower solitary. Perianth blackish purple, campanulate, 6-lobed apically; tube 0.8--1.3 × 1.8--2.2 cm, papillose adaxially; lobes slightly recurved, deltoid-ovate, 1.5--1.9 cm × 0.8--1.0 mm, 6-keeled adaxially, apex widened, keels fleshy, papillose, central 4 extending from base of tube to apex of lobes. Stamens 6, inserted at base of perianth tube, subsessile; anthers subreniform, ca. 3 mm. Pistil ca. 9 mm; stigma purple, peltate, orbicular, large, ca. 1.4 cm in diam., exceeding anthers, with 3--6 minute grooves and 6 ridges adaxially. Fl. Mar. 2 n = 36*.
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