Cynanchum javanicum Cynanchum laeve Cynanchum ovalifolium var. angustifolium Cynanchum zollingeri Cynoctonum blumei Cynoctonum ovalifolium Cynoctonum zollingeri Holostemma laeve Vincetoxicum laeve Vincetoxicum zollingeri Marsdenia javanica Cynanchum crassifolium Cynanchum luzonicum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024