Plants 70-180(-260) mm high. Corms 12-16 mm in diam., tunics blackish, basal rim split vertically. Stem 5-to 7-branched, branches subtended by bracts (1-)2-5 mm long, those below appearing leaf-like, stem compressed and winged. Leaves 2, lowermost inserted at ground level, largest, falcate, 50-120(-240) x (6-)10-15 mm, margins undulate and crisped, obtuse to subapiculate, with prominent main vein and a pair of secondary veins (rarely one) on either side almost as prominent, second leaf inserted near middle of stem, 20-70 mm long, oblong-lanceolate, margins ± straight, not or hardly sheathing at base. Inflorescence a congested, flat-topped false panicle, flowers crowded at branch tips, ultimate branchlets with 1 or 2 sessile flowers; bracts green, firm-textured, 9-11 mm long, outer folded in midline, margins often red, inner obtuse or slightly emarginate. Flowers zygomorphic, tilted backward, dark blue to violet, with triangular, dark blue-black or red-purple blotch at base of lower 3 and sometimes adjacent upper lateral tepals; perianth tube funnel-shaped, 10-12 mm long; tepals elliptic-ovate, obtuse, mostly 17-20 x 7-8 mm. Filaments unilateral, ascending or extended horizontally due to adaxial tilting of flower, 11-15 mm long, exserted for 8-10 mm; anthers 3-5 mm long; pollen dark blue or red-brown. Style dividing opposite upper 1/3 of anthers; branches 2.5-3.0 mm long, divided for ± 1/2 their length. Capsules ± top-shaped and 3-lobed, ± 6 mm long, with up to 8 seeds per locule. Seeds red-brown, ovoid, truncate at chalazal end, rugulo-reticulate, ± 1.0 x 1.0-1.3 mm, with funicular appendage 0.2-0.4 mm long.
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Cormous geophyte, 6-12 cm. Leaf blades plane, falcate, broad, margins often undulate. Flowers in corymbose panicles, deep blue with blackish markings on lower tepals, stamens unilateral, pollen dark blue to brown.
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