It is compared with the two other species of Calamus from Taiwan, C. formosanus and C. siphonospathus, and distinguished from them by its presence of a flagellum and absence of a cirrus.

• 且本种具有纤鞭，不具卷须，可与台湾产另两种省藤属植物（兰屿省藤与黄藤）区别。