Rhizome subterete, 8--10 mm thick, densely covered with scales. Leaves solitary; petiole 22--28 cm, rigid; leaf blade oblong-oblanceolate, 25--45 × 5.5--8 cm. Scape ca. 5.5 cm; bracts 3 or 4, white, speckled with purple. Flower solitary. Perianth dark purple, 6-lobed apically; tube ca. 8 × 18 mm; lobes horizontally spreading, ovate-lanceolate, 1.8--2.3 cm × 8--10 mm, adaxially minutely papillose, 4-keeled, keels papillose, central 2 extending to tube and fused with those of other lobes. Stamens 8, inserted at middle of perianth tube; filaments ca. 2 mm. Stigma subglobose, to 1.3 × 1.9 cm. Fl. Nov. 2 n = 38*.
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