Nepenthes bicalcarata (/nɪˈpɛnθiːz baɪˌkælkəˈrɑːtə/ or /bɪˌkælkəˈreɪtə/; Latin: bi "two", calcaratus "spur"), also known as the fanged pitcher-plant, is a tropical pitcher plant endemic to northwestern Borneo, Indonesia. It is a myrmecophyte noted for its mutualistic association with a species of ant, Camponotus schmitzi. As an ant-fed plant it lacks many of the features that characterise the carnivorous syndrome in Nepenthes, including viscoelasti