Plants 150-210 mm high, several-branched, branches subtended by bracts (1-)2-5 mm long, or sometimes leaf-like below and longer; stem ± flexuose, compressed and 2-winged. Corm obconic, 10-15 mm diam., tunics blackish, splitting vertically from base and apex. Leaves 2(3), lower 1(2) basal, usually falcate (lanceolate), 100-250(-400) x 10-14 mm, subacute to acute, with prominent main vein and 1 or a pair of secondary veins on either side also raised; margins usually ± straight to slightly undulate, rarely slightly crisped; uppermost leaf inserted near middle of stem, 25-80 mm long, narrowly oblong, not or hardly sheathing at base. Inflorescence a congested, flat-topped false panicle, ultimate branchlets 1-or 2-flowered; bracts green, leathery, 4-7 mm long, usually red distally and slightly warty, outer obtuse to truncate, keeled, inner ± obtuse to slightly emarginate. Flowers zygomorphic, tilted backward with adaxial (dorsal and upper lateral) tepals often nearly horizontal, light to dark blue with white throat and basal 1/2 of abaxial tepals with white, bracket-shaped band, not scented; perianth tube funnel-shaped, 8-10 mm long; tepals elliptic, obtuse, 10-15 x 4-5 mm. Stamens ± unilateral, ± horizontal and facing upward; filaments 9-10 mm long, exserted 7-8 mm; anthers 3.0-3.5 mm long; pollen blue to blue-grey, or purple. Style unilateral, dividing opposite or shortly beyond anther apices, held below stamens; style branches 1.5-2.0 mm long, divided for ± 1/2 their length. Capsules top-shaped, 3-lobed, ± 5 mm long, with up to 6 seeds per locule. Seeds ovoid, reticulately sculptured, ± flattened to concave at chalazal end, dark brown, ± 0.8-1.0 x 1.0-1.2 mm; funicular collar up to 0.3 mm long.
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