B. aurea × B. versicolor.
Shrub to 4 m or so tall. Leaves oblong-elliptic, to 20 cm or so long, entire or with a few large teeth. Calyx spathe-like and softly hairy, to almost half the length of the corolla. Corolla to over 30 cm long, trumpet-shaped, the lobes spreading and with fine points that bend back, fragrant, white. Fruit to about 15 cm long, more or less cylindrical.
B. ×candida has oblong to cylindrical fruits, and flowers 25-35 cm long with 5 distinct, long-pointed lobes.
This is the most common species in cultivation but a number of other species are occasionally available:
B. versicolor also has a spathe-like calyx but has apricot-coloured flowers;
B. suaveolens is occasionally cultivated but has a hairless calyx of 5 lobes;
B. arborea, with a spathe-like calyx, has been confused with this species and also has a corolla to 20 cm long with the lobes hardly discernible, and an ovoid fruit;
Source: (2002). Solanaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.