Rhizome subterete, 0.8--1.5 cm thick. Leaves solitary; petiole 22--40 cm; leaf blade narrowly elliptic, 28--60 × 6--13 cm. Scape 2.5--4 cm; bracts ca. 7. Flower solitary. Perianth pale purple, deeply 8-lobed; tube ca. 1.4 × 1.8 cm, glabrous; lobes yellowish adaxially, linear-lanceolate, ca. 2.4 cm × 5--8 mm, basally expanded inward forming toothlike or spurlike appendages. Stamens 8, inserted at middle of perianth tube, subsessile; anthers ovate, ca. 3.5 mm. Pistil ca. 7 mm; stigma purple, orbicular, large, to 1.5 cm in diam., concave adaxially, 16-lobed at margin. Berry purple, subglobose, 1.4--1.7 cm in diam., softly prickly. Fl. Apr, fr. Jun. 2 n = 38*.
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