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Plants 50-120(-200) mm long. Corm laterally flattened, almost lens-shaped, with a wide fan-shaped vertical ridge, 10-20(-25) mm wide. Foliage leaf single, rarely 2, usually falcate, 50-150 x 1.5-3.5 mm, swollen, with a wide adaxial groove, the upper part often terete, Peduncle short, elongating to 25 mm in the fruiting stage. Bracts membranous, reaching above the middle or almost to the top of the perianth tube. Flowers 1-4, somewhat salver-shaped, 40-60 mm long, the limb 30-65 mm across, pale violet, violet-blue or rarely white, the throat often orange-yellow. Perianth tube 30-40(-50) mm long, c. 1 mm in diam., widened to c. 3 mm at the top; segments elliptic or obovate-cuneate, somewhat concave, 15-30 x 7-14 mm, obtuse. Stamens exserted; anthers 5-10 mm long, slightly spreading, orange. Style 45-65 mm, curved at the top; stigmatic branches multifid and lacerate. Capsule trigonous-ellipsoid.
Cormous geophyte, 5-12 cm, corm laterally compressed, fan-shaped, tunics woody. Leaf solitary, terete in distal half. Flowers violet (occasionally white) with yellow centre, tube 30-50 mm.
Stemless, cormous geophyte, 50-120 mm tall, corm flattened, fan-shaped. Leaf 1, terete, thick and fleshy. Flowers borne singly, violet (rarely white) with pale centre.
