Plant tufted or proliferous. Leaves flat, 10-60 cm long, 1-10 mm wide, green or rarely bluish-green; margins with hard bristles widely spaced, rarely smooth. Scape simple or branched, 3-45 cm long, shorter than, equal to or slightly exceeding leaves, green; bracts green or brown and scarious, glabrous. Perianth 5-12 mm long, yellow outside and inside the tube; lobes 3-9 mm long, creamy white inside. Stamens erect; anthers 1-4 mm long; filaments 0.5-1.5 mm long.
Grows in various habitats, but inland populations consistently favour winter-wet depressions and drainage lines. Occurs in sand, loam and gravel in heath, woodland and forest.