Kangkang katup (Bauhinia sp.) is one important plant in Lingga Malay Ethnicpotion medicine in Riau Archipelago (Kepulauan Riau), and can also be found in Riau Mainland. This species has similarities with other species of the genus Bauhinia. Morphological examination cannot be carried out thoroughly because the flower and fruit organs are difficult to find. Authentication techniques using a chem…