Nepenthes hispida

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Nepenthes hispida
An upper pitcher of Nepenthes hispida from Lambir Hills

Conservation Dependent  (IUCN 2.3)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Nepenthaceae
Genus: Nepenthes
Species:
N. hispida
Binomial name
Nepenthes hispida
Beck (1895)[2]

Nepenthes hispida (

kerangas forest.[3] It is known with certainty only from Lambir Hills National Park and surrounding areas.[4]

Nepenthes hispida is listed as

Conservation Dependent on the 2006 IUCN Red List of Threatened Species.[1]

In the wild, N. hispida is only known to hybridise with N. reinwardtiana.[3][5]

Description

The

midrib. Pennate veins are indistinct. Tendrils grow to 15 cm in length.[3]

A young rosette plant

The pitchers of N. hispida are rarely more than 15 cm high and 8 cm wide. They are ovoid-ellipsoid in the lower parts and sub-cylindrical in the upper parts. Aerial or upper pitchers are more cylindrical than lower or terrestrial pitchers. Two fringed wings, up to 3 mm wide, run down the front of the pitchers. These wings are often absent in upper pitchers. The opening or mouth of the pitcher is ovate and oblique. The peristome is rounded and up to 12 mm wide. The lid or operculum is ovate-elliptic. An unbranched spur, up to 5 mm long, is inserted at the base of the lid.[3]

Nepenthes hispida has a racemose inflorescence. The peduncle is up to 5 cm long and 1.5 cm thick. The rachis is attenuate and may grow to 10 cm in length. The partial peduncles, which are up to 8 mm long, are two-flowered at the base only, otherwise one-flowered. Sepals are elliptic and up to 4 mm long. Male and female inflorescences are of similar structure.[3]

A very dense indumentum of bristle-like, purple-grey hairs covers the stem. A sparser covering of shorter hairs is present on the inflorescence. Hairs on the surfaces of the leaves are apparently caducous, or shed at an early stage of development.[3]

Distribution and habitat

In

Pitcher Plants of Sarawak, Clarke and Ch'ien Lee state: "Recent observations of populations of N. hirsuta throughout Sarawak suggest that morphological variation in this species is much greater than previously assumed. Accordingly, the only plants that we equate with N. hispida here are those from the Lambir Hills area".[4]

Nepenthes hispida grows in shady

kerangas forest on steep sandstone ridges and is often sympatric with Eugeissona palms.[3][4] The species occurs at elevations of 100 to 800 m.[3]

Taxonomy

Rosette plants with lower pitchers

Nepenthes hispida is very similar to the closely related

taxonomists contest its status as a separate species.[6][7] It is also similar to N. macrovulagris
, from which it differs in several aspects of pitcher and leaf morphology.

In his 1928 monograph, "

intergrades between both taxa.[1]

Matthew Jebb and Martin Cheek suggest that N. hispida is related to N. philippinensis, a species endemic to Palawan in the Philippines.[10][11]

In his Carnivorous Plant Database, taxonomist

heterotypic synonym of N. hirsuta.[7]

References

  1. ^
    doi:10.2305/IUCN.UK.2000.RLTS.T39666A10249804.en
    .
  2. ^ (in German) Beck, G. 1895. Die Gattung Nepenthes. Wiener Illustrirte Garten-Zeitung 20(3–6): 96–107, 141–150, 182–192, 217–229.
  3. ^ a b c d e f g h i Clarke, C.M. 1997. Nepenthes of Borneo. Natural History Publications (Borneo), Kota Kinabalu.
  4. ^
    Pitcher Plants of Sarawak
    . Natural History Publications (Borneo), Kota Kinabalu.
  5. ^ McPherson, S.R. 2009. Pitcher Plants of the Old World. 2 volumes. Redfern Natural History Productions, Poole.
  6. ^ Clarke, C.M. 2006. Introduction. In: Danser, B.H. The Nepenthaceae of the Netherlands Indies. Natural History Publications (Borneo), Kota Kinabalu. pp. 1–15.
  7. ^ a b Schlauer, J. N.d. Nepenthes hispida. Carnivorous Plant Database.
  8. ^ Danser, B.H. 1928. The Nepenthaceae of the Netherlands Indies. Bulletin du Jardin Botanique de Buitenzorg, Série III, 9(3–4): 249–438.
  9. ^ Jebb, M.H.P. & M. Cheek 1997. A skeletal revision of Nepenthes (Nepenthaceae). Blumea 42(1): 1-106.
  10. doi:10.2307/4111166
  11. ^ Schlauer, J. 2000. "Literature Reviews" (PDF). Carnivorous Plant Newsletter 29(2): 53.

Further reading

  • Lee, C.C. 2000. Recent Nepenthes Discoveries. [video] The 3rd Conference of the International Carnivorous Plant Society, San Francisco, USA.
  • Mansur, M. & F.Q. Brearley 2008. Ecological studies on Nepenthes at Barito Ulu, Central Kalimantan, Indonesia. Jurnal Teknologi Lingkungan 9(3): 271–276.
  • McPherson, S.R. & A. Robinson 2012.
    Field Guide to the Pitcher Plants of Borneo
    . Redfern Natural History Productions, Poole.
  • Steiner, H. 2002.
    Borneo: Its Mountains and Lowlands with their Pitcher Plants
    . Toihaan Publishing Company, Kota Kinabalu. viii + 136 pp.
  • Thorogood, C. 2010.
    The Malaysian Nepenthes: Evolutionary and Taxonomic Perspectives
    . Nova Science Publishers, New York.
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