Heterostemma oblongifolium

Heterostemma oblongifolium is native to regions in South-Central and Southeast China, as well as Hainan, Laos, and Vietnam. It is part of the Apocynaceae family, commonly known as the dogbane family, which includes a variety of flowering plants. The species was formally published in 1912 by Costantin, who provided its original description. It is one of several species within the genus Heterostemma, a group of plants characterized by their specific morphological traits. Its distribution spans across several countries in Southeast Asia, indicating a regional adaptation to the climates and ecosystems of these areas.