Rhizome subterete, ca. 4 mm thick, densely covered with scales. Leaves solitary; petiole 7--9 cm, rigid; leaf blade slightly spotted with yellow, oblong-lanceolate to narrowly elliptic, 11.5--23 × 3--5 cm, base cuneate, apex acuminate. Scape 1.5--2.5 cm; bracts 2--4. Flower solitary. Perianth yellow, campanulate, 6-or 7-lobed apically; tube ca. 1.3 × 1 cm; lobes ± recurved, narrowly ovate-lanceolate, ca. 4.5 × 3 mm, slightly fleshy. Stamens 6 or 7, inserted at middle of perianth tube, positioned higher than stigma; filaments 1--1.5 mm; anthers broadly elliptic, ca. 1 mm. Pistil ca. 3 mm; style articulate; stigma slightly enlarged, ca. 1.7 mm in diam., 3-parted at margin. Fl. Apr. 2 n = 36*.