Perennial herb, geophyte, 0.12-0.35 m high; corm symmetric, tunics blackish, imbricate; stem erect, smooth, simple or rarely branched. Leaves 3, hairy, linear-ensiform, margins extended outwards at right angles to blade; midrib raised and winged. Bracts reddish brown, membranous, dry. Inflorescence a 2-6-flowered spike, flexed at base; flowers purple, pink, red or cream-coloured; tepals red-flushed on reverse; perianth tube 1.0-2.5 mm long; tepals 10-18 mm long, obovate. Stamens 4-7 mm long; anthers 3-6 mm long. Ovary 2-3 mm long; style dividing near apex of anthers, branches recurved above. Flowering time Aug., Sept. Capsule globose to oblong.
Cormous geophyte, 12-35 cm, tunics woody, imbricate. Leaves sword-shaped to linear, margins winged and ciliate on veins and marginal wing edges. Flowers white to pale yellow.