Tufted bulbous perennial herb. Leaves 3–8, to 40 cm long and to 10 mm wide, very concave, die back after flowering. Scapes 1–3, to 40 cm long; raceme crowded, 3–5 cm long; flowers scented. Fertile flowers: pedicels 2–5 mm long; perianth broadly urceolate, 5–6 mm long, deep blue with white lobes. Sterile flowers: pedicels 1–2 mm long, ±erect; perianth clavate to obovoid, shorter than fertile flower, deep blue. Capsule broadly obovoid, 3-angled (3 cells with usually 2 black seeds per cell), 7–9 mm long.