About
Nepenthes flava is a tropical pitcher plant endemic to northern Sumatra, Indonesia. It is a climbing vine that grows in montane forest and is characterized by its yellow coloration, particularly in the upper pitchers and vegetative parts.
Field notes
Morphology
This climbing plant can reach a height of 6 meters and transitions into a scrambling vine. The stem is generally green to dark red, and the leaves are linear to narrowly obovate, measuring up to 9 cm by 2.5 cm. Lower pitchers are small (up to 7 cm high) and can vary greatly in color, while the upper pitchers are typically yellow and tubular to narrowly infundibular. The peristome is a key feature, varying from cylindrical to expanded, and the lid often bears a basal glandular crest or no appendages.
Distribution & habitat
It is endemic to northern Sumatra, Indonesia, and is found in upper montane mossy forest. Its altitudinal range is restricted to 1,800–2,200 meters above sea level. The typical habitat is open areas of forest where the vegetation rarely exceeds 4–5 meters in height.
Ecology
The pitcher fluid is highly viscous and coats the inner walls, suggesting the traps function as both pitfall and flypaper traps. Small flying insects are observed to be trapped by the sticky inner walls before sliding down into the fluid for digestion. The species is naturally found alongside other Nepenthes species, including *N. mikei* and *N. ovata*.
History & etymology
The species was formally described in 2007 by Andreas Wistuba, Joachim Nerz, and Andreas Fleischmann, based on cultivated material. The specific epithet *flava* is derived from the Latin word for 'yellow,' referring to the bright yellow color of the upper and lower pitchers. A detailed description appeared in Stewart McPherson's 2009 monograph.
Conservation
The exact locality is protected for conservation reasons, and the species is considered to be at significant risk of being poached and over-collected. It is found in upper montane mossy forest, though the specific location does not lie within a national park.
Habitat
- Altitude
- 1,800–2,200 m
- Altitude Class
- highland
- Native To
- Sumatra
Taxonomy
- Described
- 2007
- Authority
- Wistuba, Nerz & A.Fleischm.
Cultivation
- Difficulty
- intermediate
- Temperature
- Day 18–25°C / Night 10–18°C
- Humidity
- 70–95%
In My Collection 1 plant
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