Natural Habitat and Distribution
Nepenthes tenuis grows in mossy forest and light sub-montane forest at the tops of sandstone ridges. The only known population occurs at an elevation of 1000–1200 m above sea level. Nepenthes tenuis is endemic to a region of the Tjampo river east of Taram in West Sumatra. Most ridges in this area have an elevation of just below 1000 m, although several exceed this height.
Terrestrial pitchers of N. tenuis often develop partially embedded in moss. The lower parts of the stem may also be covered under a layer of moss, making the plants difficult to find in the wild.
In its natural habitat, the species is sympatric with N. adnata and grows in close proximity to N. albomarginata, N. ampullaria, N. eustachya, N. gracilis, N. longifolia, and N. reinwardtiana. Despite this, no natural hybrids involving N. tenuis have been recorded.
Nepenthes tenuis is listed as Data Deficient on the 2006 IUCN Red List of Threatened Species. The habitat of this species may be threatened in the near future by fires deliberately started to clear forest for agricultural purposes.
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