Alstonia is a genus of evergreen trees and shrubs belonging to the dogbane family Apocynaceae. These plants are primarily found in tropical and subtropical regions across Asia, Africa, and Australasia. Alstonia species are known for their milky latex and simple, leathery leaves that are often arranged in whorls. The trees produce small, fragrant flowers that are typically white or yellowish and are arranged in clusters. The fruit is a pair of follicles containing numerous seeds with tufts of silky hairs that aid in wind dispersal. Alstonia plants are often used in traditional medicine for their various therapeutic properties, and some species are also valued for their timber.
