Nepenthes reinwardtiana Miq., Pl. Jungh. 168 1852.;
Native to Borneo and Sumatra and to a number of smaller surrounding islands including Bangka, Natuna, Nias, and Siberut as per Wikipedia;
Nepenthes reinwardtiana Miq. Pl. Jungh. 168. 1952.
WIKI: Nepenthes reinwardtiana (pronounced /nɨˈpɛnθiːz ˌraɪnwɔrtiˈɑːnə/, after Caspar Georg Carl Reinwardt), Reinwardt’s Pitcher-Plant, is a Nepenthes species found on the islands of Borneo and Sumatra. Although some sources have included Peninsular Malaysia and Singapore within the range of this species, these records appear to be erroneous. Nepenthes reinwardtiana has an unusually wide altitudinal distribution of 0–2200 m, being both a “lowland” and “highland” plant.
There are many different colour forms, ranging from green to dark red. This species is known for the two “eye spots” on the inside surface of its pitchers.
Pic taken at 20th WOC Orchid Show, Singapore.