Strophanthus thollonii

Strophanthus thollonii, or Thollon's strophanthus, is a plant in the dogbane family Apocynaceae.
Description.
"Strophanthus thollonii" grows as an evergreen liana up to long, with a stem diameter up to . Its fragrant flowers feature a white turning yellow, pink and purple corolla, white and red or purple-streaked on the inside. The plant has been used as arrow poison. 
Distribution and habitat.
"Strophanthus thollonii" is native to Ivory Coast, Nigeria, Cameroon and Gabon. Its habitat is forest riverbanks from sea level to altitude.