Plants 100-150 mm high, simple or few-to many-branched, mostly from base, stem compressed and 1-or 2-angled. Corm triangular in outline, basal rim prominently serrated, 24-28 mm diam. at base. Leaves several, the basal ribbed, 1/3 to ± as long as stem, to 5 mm wide, upper leaves progressively smaller above, smooth, the uppermost resembling floral bracts. Spike 6-to 10-flowered; bracts green, outer 10-18 mm long, with shallow, slightly serrated keel, inner ± 1/3-1/2 as long as outer, membranous with two darker keels, notched at apex. Flowers blue-purple, lower tepals with V-shaped white mark above base surrounded by darker violet to ± black zone, lower median tepal with a small claw-like tooth above base, unscented; perianth tube slender below, widening and curving outward in upper 1/3, 35-38 mm long; tepals unequal, dorsal erect, ovate, ± 15 x 6 mm, upper laterals slightly smaller, recurved, lower tepals united basally for ± 3 mm, curving downward, ± 8 x 4 mm. Stamens unilateral, arcuate; filaments ± 7 mm long, exserted ± 3 mm from mouth of tube; anthers suberect, prominently tailed, ± 4 mm long; pollen yellow. Style arching above stamens, dividing opposite lower 1/3 to middle of anthers; style branches ± 3.5 mm long, divided for slightly > 1/2 their length. Capsules ovoid, ± 12 mm long, showing outline of seeds, with moderately well developed locular ridges. Seeds unknown.
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