Nepenthes sibuyanensis
Content
Description
Terrestrial shrub or climber 0.7-2 m tall.
Leaves thinly to thickly coriaceous, sessile, linear-lanceolate, linear-oblong or slightly spathulate, 10-21 by 2.4-3.8(-5) cm, apex acute to rounded, often slightly peltate, base gradually or barely attenuate to the stem, decurrent as narrow wings 2-3 mm wide for 2/3, to a whole internode and converging towards the opposite surface of the stem.
Fruit 18-22 by 3-4 mm.
Seeds filiform, 8 mm long.
Distribution
Asia-Tropical: Philippines (Philippines present), Sibuyan present
Philippines: Sibuyan Island.
Taxonomy
2. The above description is taken partly from the protologue, in which the description of the upper and lower pitchers are united. Figures given in brackets in the description are taken from dimensions given by the collector of the type in a detailed article on the discovery of this species (). Apparently nearly sympatric with N. argentii, from which it is inferred that the shrubby grassland habitat of N. sibuyanensis is also induced by ultramafic soils. Known only from five collections (P. Mann & T. Smith 015001-015004, L n.v.) collected at the type lo-cality on 5 October 1996 and Argent & Reynoso 89128 (E n.v., K, PNH n.v.).
1 Nepenthes sibuyanensis is closely similar and seems very closely related to N. ventricosa, a species fairly widespread in Luzon, and to N. burkei, endemic to Mindoro. The differences are given in the key, the most conspicuous being the larger pitchers which lack any sign of constriction at the midpoint. These three species form part of the Insignes group.