Martin Cheek
"Nepenthes wilkiei" was described by Matthew Jebb and Martin Cheek in 1998. This taxon was subsequently found to be conspecific with "N. philippinensis". Jebb and Cheek suggest that "N. philippinensis" is more closely related to the Bornean species "N. hirsuta", "N. hispida", and "N. macrovulgaris" than it is to "N. alata".