kallerna · CC BY-SA 4.0
About
Nepenthes villosa, or the villose pitcher-plant, is a tropical pitcher plant endemic to Mount Kinabalu and neighboring Mount Tambuyukon in Borneo. It is characterized by its dense covering of long, brown hairs (indumentum) and its highly developed, intricate peristome.
Field notes
Morphology
The plant is a weak climber, rarely exceeding 60 cm in height, though the stem can grow up to 8 m in length. Leaves are coriaceous and petiolate, with the lamina being spathulate to oblong, up to 25 cm long. Pitchers are urceolate to ovate, growing up to 25 cm high and 9 cm wide. A key feature is the cylindrical peristome, which is up to 20 mm wide and bears well-developed teeth and ribs. The entire plant is covered in a dense indumentum of long, brown hairs.
Distribution & habitat
This species is endemic to the upper slopes of Mount Kinabalu and neighboring Mount Tambuyukon in Sabah, Borneo. It typically grows at high elevations, ranging from 1,600 m to 3,240 m above sea level. On Mount Kinabalu, it is common along the Mesilau Trail, while on Mount Tambuyukon, it is found at lower elevations (1,600–1,900 m).
Ecology
The species often thrives in mossy and sub-alpine forests, particularly those dominated by species of *Dacrydium* and *Leptospermum*. It is endemic to ultramafic soils, which are common in the region. While the source details its habitat, it does not provide specific information regarding its carnivory, prey capture mechanism, or mutualisms.
Cultivation notes
The source mentions that measured tolerances for *N. villosa* were studied in the late 1990s, and many plants in cultivation originate from a vigorous tissue culture clone. However, it does not provide specific details on ideal temperature ranges, humidity levels, or growth rates for hobbyists.
History & etymology
The species was formally described in 1852 by Joseph Dalton Hooker, who published the description in *Icones plantarum*. It was first collected in 1858 by Hugh Low during his second ascent of Mount Kinabalu. Later, in 1928, B. H. Danser treated *N. edwardsiana* in synonymy with *N. villosa* in his monograph.
Conservation
All known populations of *N. villosa* grow within Kinabalu National Park, making collection illegal. While some experts suggest the species has a secure future, the number of plants has declined in recent years due to the significant impact of climbers on the summit trail.
Habitat
- Altitude
- 1,600–3,240 m
- Altitude Class
- highland
- Native To
- Malaysia
- IUCN Status
- Least Concern
Taxonomy
- Described
- 1852
- Authority
- Hook.f.
Cultivation
- Difficulty
- expert
- Temperature
- Day 15–22°C / Night 5–12°C
- Humidity
- 80–95%
In My Collection 1 plant
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