Buddleja acuminata is a rare shrub endemic to the northern half of Madagascar and eastern Zaire, where it grows along forest edges and in clearings at elevations of 50–800 m. The species was first named and described by Poiret in 1810 
B. acuminata is a sarmentose, often lianescent, shrub 1.5–3 m in height, with stellate-tomentose branchlets. The opposite dark - green leaves have petioles 0.7–2 cm long, the blades variable in shape, from triangular to narrowly ovate, 5–11 cm long by 1.5–6.5 cm wide, long-acuminate at the apex, subcordate to cuneate at the base, all but glabrous above, stellate - tomentose below; the margins range from coarsely dentate at the base, to entire and covered by a thick felt-like indumentum. The inflorescences are white panicles, initially small and congested < 2 cm in diameter at anthesis, enlarging to 15 cm long by 6 cm, the corollas 9–13 mm long.
B. acuminata is not known to be in cultivation.
- Poiret, J. L. M. (1810). Encyc. Suppl. 1 (2): 745. 1810.
- Leeuwenberg, A. J. M. (1979). The Loganiceae of Africa XVIII - Buddleja LII, Revision of the African & Asiatic species. Mededelingen Landbouwhogeschool Wageningen, Nederland. 79 - 6 (1979).