Nepenthes holdenii
About
A distinctive tropical pitcher plant, *Nepenthes holdenii*, is notable for its long tendrils and globose lower pitchers, setting it apart from related species. It is also a fire-adapted plant, utilizing a thick underground tuber to survive drought and wildfires.
Field notes
Morphology
Leaves are coriaceous, subpetiolate, and linear to linear-lanceolate, measuring 25–40 cm long and 3.5–6 cm wide. The pitchers can reach up to 30 cm long. The plant has long tendrils and globose lower pitchers. The stem is round, shiny, and 6 to 8 millimeters wide, while climbing stems can grow up to 5 meters during the rainy season.
Distribution & habitat
Found in the Cardamom Mountains of the Pursat Province of Cambodia, in the transitional zone between lowland evergreen forest and low montane evergreen forest. The area experiences a tropical monsoon climate, with distinct rainy and dry seasons.
Ecology
The species is carnivorous, trapping insects using pitcher-shaped leaves. It attracts prey with nectar secreted at the rim (peristome), which becomes slippery when wet. Once trapped, smooth walls and digestive fluid, containing enzymes like proteases and chitinases, prevent escape and digest the prey.
History & etymology
Originally collected and diagnosed by Lecomte in 1909 as Nepenthes thorelii, but was later distinguished as Nepenthes holdenii using photographs and in situ examination by Mey.
Habitat
- Altitude
- 600–800 m
- Altitude class
- intermediate
- IUCN status
- Near Threatened
Taxonomy
- Described
- 2010
- Authority
- Mey
Cultivation
- Difficulty
- intermediate