Anodendron affine (Hook. et Arn.) Druce

Family: Apocynaceae
Japanese: サカキカズラ[Sakakikazura]

A fine vine with almost waxy leaves whose shape is perhaps reminiscent of the sakaki tree, but it can grow to be quite monstrous.

References:
九州野山の花 片野田逸朗,2004：南方新社
米倉浩司・梶田忠 (2003-)　「BG Plants 和名－学名インデックス」（YList），http://ylist.info（ 2019年8月13日）