Tussocks narrow, dense. Leaves very fine, variously shaped in section, 20-50 cm long, 0.5-1 mm wide, glabrous except regularly and minutely serrulate margins; apex entire; sheath margins readily lacerated, white. Inflorescence usually branched; scape hidden by leaf bases; axes irregularly flattened, with separate flowers. Male inflorescence 2-3 cm long, with 1 or few short nearly erect branches. Female inflorescence sometimes unbranched. Bracts long-acuminate, equalling the flower. Male flowers globular, 2.5 mm long; sepals longer and thinner than petals, pale green; petals yellowish; pedicel c. 1 mm long. Female flowers campanulate, 3 mm long, subsessile.