Strophanthus preussii belongs to the Apocynaceae (the Dogbane family). It is an evergreen shrub that is native to the west and central tropical Africa. This herb grows in moist forests and forest margins, at elevations from sea-level up to 1,400 m. This shrub is twining and producing stems up to 12 m long. The leaves are oblong with short acute tips. The flowers are fragrant, white to orange, red-striped or spotted on the inside. Corollas have very long tails. The plant has also been used as arrow poison.