Rhizome subterete, 6--10 mm thick. Leaves solitary or occasionally paired; petiole 10--21 cm, stiff; leaf blade usually with yellowish green spots, narrowly lanceolate, 30--55 × 4--6 cm. Scape 1.5--6 cm; bracts 4--6. Flower solitary. Perianth purple except for white base, campanulate, 8-lobed apically; tube 1--1.2 × 1.3--1.5 cm, adaxially papillose; lobes spreading or reflexed, deltoid-ovate to oblong, 7--9 × 4--6 mm, 3-or 4-keeled and papillose adaxially, keels fleshy, papillose. Stamens 8, inserted proximally in perianth tube; filaments ca. 2 mm; anthers ovate, 1.5--2 mm. Pistil 5--6 mm; stigma peltate, orbicular, large, 0.9--1.1 cm in diam., with 4 hollows at center adaxially. Fl. Mar.
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