Nepenthes inermis × N. talangensis has been the subject of taxonomic confusion in the past. In a 1973 article on the Nepenthes of Borneo, Singapore, and Sumatra, Shigeo Kurata incorrectly identified specimens of this hybrid as belonging to N. dubia. In 1997, Matthew Jebb and Martin Cheek published their monograph A skeletal revision of Nepenthes (Nepenthaceae), in which they referred to N. dubia plant material from Mount Talang (Kurata s.n. SING). Charles Clarke later identified Kurata s.n. as representing N. inermis × N. talangensis.