Nepenthes × pyriformis

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Nepenthes × pyriformis
An upper pitcher of Nepenthes × pyriformis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Nepenthaceae
Genus: Nepenthes
Species:
N. × pyriformis
Binomial name
Nepenthes × pyriformis
Synonyms

Nepenthes × pyriformis (

natural hybrid involving N. inermis and N. talangensis.[6] It is known only from Mount Talang in Sumatra, to which N. talangensis is endemic. Nepenthes talangensis was only described as a distinct species in 1994.[7] Prior to this it was placed within N. bongso and some of the older literature identifies this hybrid as N. bongso × N. inermis.[5]

Nepenthes inermis × N. talangensis has been the subject of taxonomic confusion in the past. In an article published in 1973 on the Nepenthes of Borneo, Singapore, and Sumatra,[4] botanist Shigeo Kurata incorrectly identified specimens of this hybrid as belonging to N. dubia.[8]

In 1997, Matthew Jebb and Martin Cheek published their monograph "A skeletal revision of Nepenthes (Nepenthaceae)", in which they referred to N. dubia plant material from Mount Talang (Kurata s.n. SING).[3] Charles Clarke later identified Kurata s.n. as representing N. inermis × N. talangensis.

The natural hybrid is similar to N. dubia, but can be distinguished on the basis of several stable characters. The hybrid has a wider pitcher lid that is never relfexed beyond 90 degrees and the pitcher cup is not appressed in the lower parts as in N. dubia. In addition, the mouth of N. inermis × N. talangensis is raised towards the back as opposed to being horizontal.[8]

In 2001, Kurata described this hybrid as a new species, N. pyriformis.

type specimen of N. pyriformis, Kurata & Mikil 4230 NDC, matches the appearance of N. inermis × N. talangensis "in most respects".[8] Following Clarke's interpretation, Kurata excluded N. pyriformis from his list of Nepenthes species the following year.[9]

References

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  1. ^ von Arx, B., J. Schlauer & M. Groves 2001. "CITES Carnivorous Plant Checklist" (PDF). Archived from the original (PDF) on 2008-05-13. The Cromwell Press, United Kingdom.
  2. ^
    Journal of Insectivorous Plant Society
    52(2): 30–34.
  3. ^ a b Jebb, M.H.P. & M.R. Cheek 1997. A skeletal revision of Nepenthes (Nepenthaceae). Blumea 42(1): 1–106.
  4. ^ a b Kurata, S. 1973. Nepenthes from Borneo, Singapore and Sumatra. The Gardens' Bulletin Singapore 26(2): 227–232.
  5. ^
    MiB) Carnivorous Plant Newsletter
    19(1–2): 19–28.
  6. Field Guide to the Pitcher Plants of Sumatra and Java
    . Redfern Natural History Productions, Poole.
  7. ^ Nerz, J. & A. Wistuba 1994. Five new taxa of Nepenthes (Nepenthaceae) from North and West Sumatra Archived 2011-08-05 at the Wayback Machine. Carnivorous Plant Newsletter 23(4): 101–114.
  8. ^ a b c Clarke, C.M. 2001. Nepenthes of Sumatra and Peninsular Malaysia. Natural History Publications (Borneo), Kota Kinabalu.
  9. ^ Kurata, S. 2002. "Revision trial in recent enumeration of Nepenthes species" (PDF). Proceedings of the 4th International Carnivorous Plant Conference: 111–116.
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