Clerodendrum bungei is a deciduous
shrub that grows up to 2 m in height. Its leaves are
cordate (heart-shaped), 10–20 cm long and not quite as wide, and have coarsely toothed edges. The flowers, which appear in late summer, are coloured rose, crimson, or pink, and arranged in a conspicuous rounded
terminal inflorescence known as
corymb, which is up to 10 cm in diameter. As in other
Clerodendrum species, the
calyx is five-lobed. At the centre of each flower there is a slender tube 3–4 cm long which terminates in five spreading white lobes. While the flowers are fragrant, crushed leaves have an unpleasant odour.{{cite journal |url=https://www.researchgate.net/publication/268386837_Ant-Plant_Interactions_between_Native_Ants_and_Non-Native_Plants_with_Extrafloral_Nectaries_New_Insights_from_the_Brissago_Islands_Canton_Ticino_Switzerland ==Taxonomy==