Perennial, rhizomatous herb, 0.30-0.45 m high, robust. Leaves linear, apex acuminate, margins usually brown; basal 2-16; cauline usually solitary or absent, arising just below and extending above inflorescence, with keeled base. Spathes rusty green. Bracts broadly ovate, hyaline or rusty brown. Inflorescence usually with 2 separated clusters of binate rhipidia; outer tepals with a pale green midvein region on underside, shorter and thinner than inner ones. Ovary with branched style, each lobe deltoid and finely crested. Flowering time Aug.-Apr. Capsule oblong.
Rhizomatous perennial, 10-30 cm, stem flattened and 2-winged, consisting of 1 long internode with a short, subterminal leaf. Leaves sword-shaped. Flowers blue, spathes rusty, dry, lacerate with age. Capsules oblong.