About
This rare pitcher plant, *Nepenthes mapuluensis*, is notable for its restricted endemic range to the Sambaliung mountain range in East Kalimantan, Borneo. It features ellipsoidal pitchers with two fringed wings and a moderately developed, wavy peristome.
Field notes
Morphology
The leaves are coriaceous, with a lamina that is oblanceolate-linear, up to 26 cm long and 5 cm wide. The pitchers are ellipsoidal, growing to 21 cm in height and 8.5 cm in diameter, and possess two fringed wings up to 10 mm wide. The peristome is moderately developed and wavy, measuring up to 12 mm wide. The plant is mostly glabrous, though pitchers may have scattered short hairs.
Distribution & habitat
Endemic to the Sambaliung mountain range in East Kalimantan, Borneo. It is found on limestone substrates at elevations between 50 and 850 m.
Cultivation notes
The species is extremely rare in cultivation, though it has been artificially crossed with *N. ventricosa* to produce the hybrid *Nepenthes × mapulucosa* Hort.Westphal.
History & etymology
First collected in 1957 on Mount Ilas Mapulu by A.J.G. 'Doc' Kostermans. The species was formally described in 1990 by J. H. Adam and C. C. Wilcock.
Conservation
Listed as Endangered on the IUCN Red List.
Habitat
- Altitude
- 700–800 m
- Altitude Class
- intermediate
- Native To
- Borneo, Kalimantan
- IUCN Status
- Endangered
Taxonomy
- Described
- 1990
- Authority
- J.H.Adam & Wilcock
Cultivation
- Difficulty
- intermediate
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