Shrub to 3 m tall. Leaves lanceolate to 15 cm or more long, 8 cm wide, hairy. Flower clusters axillary or terminal, to about 20 per cluster. Flowers with tube about 3.5 cm long, dark blue-violet. [I. lanceolatum (Miers) Miers, I. tubulosum Benth.]
I. grandiflora Benth. from Ecuador is occasionally sold and has slightly larger, deep violet-purple flowers in clusters of 6-8.
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. (as Iochroma cyanea)