Herb forming swards to 2 sq. m or more. Rhizomes wiry, creeping, c. 1-3 cm long. Leaves usually 5 live per stem, tufted; lamina usually to 5 cm long, 1.5-4 mm wide, subfleshy, sometimes glaucous, longitudinally folded; sheath c. 1 cm long. Inflorescence and infructescence subsessile, surrounded by 2-4 bract-like reduced leaves. Sepals and petals c. 2 cm long, 2.5-3 mm wide, white, blue or lilac. Stamens free, c. ½ length of perianth; anthers 2-3 mm long; filaments filiform. Style filiform, c. equal to stamens; stigma undivided. Capsule globose, 3-5 mm long. Seeds flattened, ovoid to oblong, 2-3 mm long.
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