The bulb is typically large, brown and rounded and has a moderate growth rate. The large clusters of scented, trumpet-shaped pink or white flowers are carried on a long purplish-red and green stem appearing 50cm above the soil. Up to twelve flowers are produced from the flowering stem. These flowers are 10cm long and apically flare open about 8cm. Protruding from each flower is a long upturned style amongst a group of large curved anthers. The anthers are black and shiny at first, but split open to reveal masses of sticky white pollen. The inflorescence tends to face the direction that receives the most sun. Although most flowers are pale pink, white and dark pink forms occur.

The strap-like leaves are deciduous and are produced after flowering.

The leaves remain green throughout the winter period. The leaves produce a starch, which is stored in the bulb. In summer the leaves die back and the bulb becomes dormant. This strange phenomenon of flowering before the leaves appear is known as hysteranthy. The Belladonna Lily’s specific flowering time is late summer, February and March.