Amphineurion is a genus of plants in the Apocynaceae, first described as a genus in 1948. It contains only one known species, Amphineurion marginatum, native to Cambodia, S China (Guangdong, Hainan), India, Indonesia, Laos, Malaysia, Philippines, Thailand and Vietnam. Aganosma marginata is a liana that can grow up to 8 metres (26 ft) in length.> When young, it sometimes forms a shrub with arching branches. Its habitats are mountain forests and seashore thickets.