Tabernaemontana pachysiphon grows as a shrub or small tree up to 15 metres (50 ft) tall, with a trunk diameter of up to 40 centimetres (16 in). Its fragrant flowers feature white to pale yellow corolla lobes. The fruit is green, almost spherical, up to 15 centimetres (6 in) in diameter. Its habitat is forests from sea level to 2,200 metres (7,200 ft) altitude. Its numerous local medicinal uses include as a styptic, and as a treatment for headache, hypertension and to relieve cramps. The species is native to tropical Africa.