Short-lived perennial, roots fleshy-fibrous. Leaves densely tufted, linear, 12-25 cm × 2-4 mm, fleshy, striate, hollow, semicylindric to ± trigonous, finely scabrid. Scape simple or branched, 20-60 cm high, firm. Racemes to 20 cm long, lax; pedicels erect, articulate at middle, bract acuminate. Flowers c. 1 cm long, 2 cm diam., white or pale pink; segments spreading, each with a conspicuous green or purple median vein. Staminal-filaments dilated and ciliate at base. Capsule c. 5 × 5 mm, retuse, valves with few large transverse furrows. Seeds c. 3.5 mm long, fusiform-trigonous, black.