In 1983, Bruce Lee Bednar wrote that cultivated plants labelled as N. kampotiana were thought to represent a natural hybrid between N. mirabilis and N. thorelii, and that these appeared on some lists under the unofficial name N. × lecouflei [REF].
In their 1997 monograph on the genus Nepenthes, Matthew Jebb and Martin Cheek designated the male specimen deposited at the Paris herbarium as the lectotype of N. thorelii [REF].