Nepenthes maxima Reinw., Ann. Sci. Nat. (Paris) 3: 369 1824.;
It has a relatively wide distribution covering New Guinea, Sulawesi, and the Maluku Islands. It may also be present on Wowoni Island as per Wikipedia;
Nepenthes maxima Reinw. Ann. Sci. Nat. (Paris) 3: 369, t. 20. 1824
WIKI: Nepenthes maxima, the Great Pitcher-Plant, is a carnivorous pitcher plant species of the genus Nepenthes.
It has a relatively wide distribution covering Sulawesi, New Guinea, and the Maluku Islands. It is closely related to N. eymae.
Pic taken at 20th WOC Orchid Show, Singapore.