Strophanthus is a genus of flowering plants in the family Apocynaceae, primarily found in tropical regions of Africa and Asia. These plants are known for their attractive flowers and can vary in size and shape. Some species produce seeds that contain toxic compounds, which have been historically used in traditional medicine and as arrow poisons. The most notable species, Strophanthus gratus, is famous for its use in the production of the cardiac glycoside ouabain, which has applications in treating heart conditions. Strophanthus plants typically thrive in well-drained soils and can be found in various habitats, including forests and grasslands.