Plants 200-550 mm high. Corm 30-50 mm diam.; tunics of densely matted fibres, with long collar. Stem erect, unbranched or rarely with a solitary short erect branch, 2.0-2.5 mm diam. Basal leaves 1 to 3, usually green at flowering, blade linear or linear-lanceolate, 150-350 x 3-6(-)8 mm, acuminate, narrowed below, with 2 or 3(4) veins; cauline leaves 3 to 5, lowest linear and leaf-like, concealed by collar, upper 2 to 4 reduced to scales or vestigial. Spike moderately to densely ± 5-to 22-flowered, 5-120 mm long; bracts dry and brown, leathery or cartilaginous, ovate or oblong, outer 7-11 mm long, acute or obtuse, rarely mucronulate, inner slightly longer. Flowers zygomorphic, dingy or brownish pink sometimes tipped with crimson, the lower three tepals with red median lozenge or streak, unscented; perianth tube narrowly funnel-shaped, 5-8 mm long; tepals unequal, dorsal larger, arched over stamens, apically recurved, oblanceolate-spathulate, clawed in lower 2/3, 20-23 x 3-5 mm, obtuse or emarginate, other tepals suberect and recurved in distal 1/3, 16-20 x 2-4 mm, upper laterals joined to lower laterals for ± 1 mm and lower 3 tepals joined at base for 3-5 mm. Filaments arcuate, later diverging, 12-14 mm long; anthers yellow, 4-6 mm long with short apiculus 0.5-1.0 mm long. Style ± 20 mm long, dividing opposite base to middle of anthers, branches 1.5-2.0 mm long. Capsules ovoid or subglobose, inflated, 20-25 x 10-15 mm. Seeds up to 6 mm long, winged on angles.
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Like T. ramosa but never branched and bracts obtuse, rigid when dry.