Nepenthes rajah
EN

Nepenthes rajah

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Nepenthes_rajah

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Nepenthes rajah faces severe pressure from overcollection by plant enthusiasts and commercial traders who prize its spectacular giant pitchers, leading to population depletion in accessible areas. Habitat degradation from logging, agricultural expansion, and tourism development on Mount Kinabalu further fragments its already restricted montane forest range. Climate change poses an additional threat by altering the cool, humid conditions this high-altitude specialist requires.

Threat summary

Habitat

This carnivorous plant is endemic to the ultramafic soils of Mount Kinabalu and Mount Tambuyukon in Sabah, Borneo, occurring in montane forest clearings and ridge tops between 1,500-2,650 meters elevation. It requires the cool, humid conditions and nutrient-poor serpentine soils characteristic of these high-altitude tropical montane ecosystems.

Conservation measures underway

Site/area protectionLegislation

Other threatened species in NEPENTHACEAE

Nepenthes northianaVU

Nepenthes northiana

Unknown
CR

Nepenthes tboli

Unknown
EN

Nepenthes masoalensis

Unknown
Nepenthes distillatoriaVU

Nepenthes distillatoria

Unknown

Threatened in Malaysia

Acropora hemprichiiEN

Acropora hemprichii

Declining
VU

Podocarpus ridleyi

Declining
EN

Benstonea saint-johnii

Unknown
VU

Hopea coriacea

Declining

Frequently asked questions

Why is Nepenthes rajah classified as Endangered?
Nepenthes rajah is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Nepenthes rajah faces severe pressure from overcollection by plant enthusiasts and commercial traders who prize its spectacular giant pitchers, leading to population depletion in accessible areas. Habitat degradation from logging, agricultural expansion, and tourism development on Mount Kinabalu further fragments its already restricted montane forest range. Climate change poses an additional threat by altering the cool, humid conditions this high-altitude specialist requires.
Where does Nepenthes rajah live?
Nepenthes rajah occurs in Malaysia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Nepenthes rajah?
The main threats to Nepenthes rajah are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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