Rhizome subterete, 6--11 mm thick. Leaves solitary or 2-or 3-tufted; petiole 2--14 cm; leaf blade linear-oblanceolate, 25--45 × 1.8--3.5 cm. Scape 0.8--2 cm; bracts 3--5. Flower solitary. Perianth pale yellow-green, spotted with purple abaxially, subcupular, 6-lobed apically; tube purple adaxially except for white base, ca. 7 × 13 mm; lobes erect, pale yellow adaxially, deltoid, 5--7 × 5--6 mm, smooth. Stamens usually 6, inserted at base of perianth tube; filaments ca. 1 mm; anthers broadly ovate, 2--3 mm. Pistil ca. 5 mm; stigma purple or with yellow center, peltate, orbicular, 5--8 mm in diam., with 3 white grooves, 3(or 4)-lobed at margin. Fl. Dec.
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