Perianth funnel-shaped; tube usually short, rarely long, often furnished with minute scales or a distinct neck at the throat; segments ovate, subequal or the lowest of the inner row narrower. Stamens declinate, inserted at the throat of the perianth-tube; filaments filiform; anthers linear or linear-oblong, versatile. Ovary 3-celled; ovules many, superposed; style long, filiform, declinate; stigma capitate or trifid. Capsule globose, loculicidally 3-valved. Seeds flattened, with a thin black testa. —Rootstock a bulb with membranous tunics. Leaves lorate or linear. Peduncle hollow. Flowers large and showy, few in an umbel.