Nepenthes hirsuta

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Nepenthes hirsuta

Upper pitchers of N. hirsuta. Bako National Park, Borneo.

Conservation status

Conservation Dependent

Scientific classification

Kingdom:	Plantae
Division:	Magnoliophyta
Class:	Magnoliopsida
Order:	Caryophyllales
Family:	Nepenthaceae
Genus:	Nepenthes
Species:	N. hirsuta

Binomial name

Nepenthes hirsuta
Hook.f. (1873)

Synonyms

Nepenthes leptochila
Danser (1928)

Nepenthes hirsuta (Latin: hirsutus = hairy, bristly) is a lowland Nepenthes species characterised by an indumentum of thick brown hairs, which is even present on the inflorescence. Pitchers are mostly green throughout with some having red blotches on the inside surfaces.

N. hirsuta grows at an elevation of 200 to 900 m. It is present in a wide range of habitats, including kerangas forest, mossy banks in lower montane forest, open areas, and disturbed vegetation on lower ridges. It grows mostly on sandstone substrates.

N. hirsuta is most closely related to N. hispida and N. macrovulagris.

Morphological differences between *N. macrovulgaris*, *N. hirsuta* and *N. hispida* (Steiner, 2002 after Clarke, 1997)
N. macrovulgaris	N. hirsuta	N. hispida
leaves charteous ≤30 cm, oblong to linear	leaves coriaceous ≤20 cm, canaliculate-spathulate or obovate	leaves coriaceous sessile ≤28 cm, oblanceolate-oblongate
apex acute to obtuse	apex acute or roundish	apex acuminate-obtuse, often unequal
base attenuate into a winged petiole, wings wider towards the base, clasping stem for about ½ its diameter, not decurrent	base attenuate, forming laterally flattened, semi-amplexicaul sheath	base attenuate, amplexicaul and often decurrent onto the internode
longitudinal veins: 2-3 on each side	longitudinal veins not prominent	longitudinal veins: 3 on each side
adult pitchers and stem glabrous, young pitchers with short, thin hairs	stem densely covered with long brown hairs, not as bristle-like as those of N. hispida	stem very densely covered with bristle-like purple-grey hairs

[edit] Forms and Varieties

N. hirsuta

"var. typica" (Hook. f.)
- "f. green"
- "f. spotted"

[edit] Gallery

Upper pitcher, Bako National Park	Lower pitcher, Bako N. P.	Part of stem, Bako N. P. (note dead growing tip)	Cultivated plant from Kuching, Sarawak
Herbarium specimens of N. hirsuta

[edit] References

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Nepenthes hirsuta

Clarke et al. (2000). Nepenthes hirsuta. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 10 May 2006.
Clarke, C.M. 1997. Nepenthes of Borneo. Natural History Publications, Kota Kinabalu, pp. 93-94.
Steiner, H. 2002. Borneo: Its Mountains and Lowlands with their Pitcher Plants. Toihaan Publishing Company, Kota Kinabalu. viii + 136 pp.