Rhizomes thick, swollen at apex. Leaves linear, 20--30 cm × 5--7 mm, overwintering, parallel veins 3--6, base surrounded by sheaths and fibers. Flowering stems 30--50 cm, with 3--5 narrowly lanceolate leaves 8--12 cm × ca. 5 mm; spathe solitary, narrowly lanceolate, 10--13.5 cm × ca. 8 mm, 1-flowered. Flowers violet, ca. 10 cm in diam.; pedicel ca. 2.5 cm. Perianth tube ca. 3 cm; outer segments marked with brown lines or dots, fiddle-shaped or oblanceolate, 5--5.5 cm × ca. 8 mm, apex retuse, claw narrow; inner segments marked with bluish brown lines, oblanceolate, 4.5--5 cm × ca. 3 mm. Stamens ca. 2.5 cm; anthers bright yellow. Style branches 4.5--5 cm × ca. 6 mm. Capsule fusiform, 5.5--7 × 1.5--2 cm, 3-angled, yellowish brown pubescent, apex long beaked. Seeds globose, 4--5 mm in diam. Fl. Mar--Apr, fr. May--Jul. 2 n = 22*.
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