Nepenthes sibuyanensis /nɪˈpɛnθiːz sɪˌbʊjəˈnɛnsɪs/ is a tropical pitcher plant endemic to Sibuyan Island in the Philippines, after which it is named.

The team comprised Thomas Alt, Phill Mann, Trent Smith, and Alfred Öhm.

The species was formally described[note a] by Joachim Nerz in the March 1998 issue of the Carnivorous Plant Newsletter.

[2][4] The holotype of N. sibuyanensis, sheet 051001, was collected on October 5, 1996, by Phill Mann and Trent Smith on Mount Guiting-Guiting at an elevation of 1300 m above sea level.

appears in the December 29, 1911 issue of Leaflets of Philippine Botany, in an article by Adolph Daniel Edward Elmer on the figs of Sibuyan.

[3] Elmer wrote that this Nepenthes formed part of the summit vegetation of Mount Guiting-Guiting, which was "washed down and disseminated as botanical floats" along the Pauala River, where he observed it.

[7] A pair of ribs runs down the front of the pitcher, sometimes bearing fringe elements (≤3 mm wide) near the peristome.

A number of ovate glands (≤1 mm in diameter) are concentrated near the centre of the lid's lower surface.

Seeds are up to 8 mm long and filiform,[2] although they lack the papery ends typical of most Nepenthes species.

[6] Nepenthes sibuyanensis occurs relatively sparsely on open slopes dominated by high grasses, small shrubs, and the fern Dipteris conjugata.

[2] Nepenthes sibuyanensis exhibits modified seed morphology owing to its exposed, isolated habitat.

The absence of seed wings in this species prevents strong winds carrying them away from suitable habitats and allows for dispersion by water (particularly rainfall and small streams).

[6][15] Nepenthes sibuyanensis belongs to B. H. Danser's Insignes group, which also includes the closely related Philippine species N. burkei, N. merrilliana, and N. ventricosa, as well as N. insignis from New Guinea.

[2] In addition, the newly described Nepenthes barcelonae from Luzon has been classified by the authors as a member of this group.

[2] Nepenthes merrilliana produces the largest pitchers in the Insignes group and, unlike N. sibuyanensis, has two-flowered pedicels.

[2] Folia mediocria sessilia, lamina lineari-lanceolata, nervis longitudinalibus utrinque 5-6, basi in alas 2 decurrente, vagina 0.; ascidia mediocria v. maiora, ovata v. infundibuliformia, costis 2 prominentibus, nonnunquam ad os rudimento alae ciliatae ornatis; peristomio operculum versus acuminato in collum breve elongato, applanato, 20 mm lato, costis 1.5 - 2 mm distantibus, dentibus 5 x longioribus quam latis.

Operculo ovato-cordato, facie inferiore plano; inflorescentia racemus parvus pedicellis 8 mm longis, omnibus 1-floris; indumentum in partibus vegetativis subnullum, in inflorescentiis densum adpressum, e pilis simplicibus compositum.