Biology
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Nepenthes pervillei is a carnivorous plant, which traps prey in its pitchers. Insects are attracted to the pitcher by a fragrant odour, but the waxy surface of the inner wall does not provide support, and the plant's victims tumble into the fluid below. A powerful digestive acid is then released from the pitcher walls, which consumes the prey (2).
Conservation
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Picher plants are listed under Appendix II of the Convention on International Trade in Endangered Species (CITES), which restricts trade in wild-collected plants (3). In addition, much of the range on Mahé fall within the Morne Seychellois National Park and only authorised personnel are allowed access to the vulnerable habitats on Silhouette Island in an effort to protect the wealth of animal and plant life found there (4) (6).
Description
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Nepenthes pervillei is a pitcher plant native to the Seychelles. It is a climbing plant that can sprawl to seven metres along the ground or in the trees as a vine (4). The leathery, green leaves are broad at the base, and tapering to their tip; they form rosettes (5) along the reddish-brown stems of the plant (2). The middle vein (or 'midrib') of each leaf extends beyond the main portion of the leaf and forms either a tendril or develops into a pitcher (2). The mature pitchers are goblet-shaped flasks that can be up to 21 cm long (2). They vary in colour from red, green, yellow or orange and are topped by a circular lid (2). Brownish-cream flowers are borne on loose clusters (5) on branching inflorescences that can be up to 40 cm long (2). Fertilised female flowers develop into the club-shaped seed capsules (5). As the capsules dry out, the valves separate, allowing the seeds within to be dispersed by the wind (4).
Habitat
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Inhabits a variety of island vegetation including scrubland, mist forest, moss forest and high altitude vegetation (4).
Range
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Endemic to the Seychelles in the Indian Ocean, Nepenthes pervillei is found on the islands of Mahé and Silhouette within the archipelago (2).
Status
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Classified as Vulnerable (VU) on the IUCN Red List 2002 (1) and listed on Appendix II of CITES (3).
Threats
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Although this pitcher plant appears to be locally abundant it is only known from a total area of 47 hectares and therefore qualifies as Vulnerable under IUCN categories (4).
Nepenthes pervillei
provided by wikipedia EN
Nepenthes pervillei (/nɪˈpɛnθiːz pɜːrˈvɪliaɪ/; after Auguste Pervillé, French plant collector) is the only pitcher plant found in the Seychelles, where it is endemic to the islands of Mahé and Silhouette. It grows in rocky areas near granitic mountain summits,[1] its roots reaching deep into rock fissures. The species has an altitudinal range of 350–750 m above sea level.[3] Like all members of the genus, N. pervillei is dioecious, having separate male and female plants.
The mite Creutzeria seychellensis has been found in the pitchers of N. pervillei.[4][5]
Taxonomy
The species was originally described as Nepenthes pervillei in 1852, but was later placed in the monotypic genus Anurosperma as Anurosperma pervillei, based on the morphology of its seeds, which differ from the closely allied N. madagascariensis (and the other members of Nepenthes) in that they lack the 'tails' characteristic of the rest of the genus. However, the more recent taxonomic database of Jan Schlauer subsumes Anurosperma back into Nepenthes.[6]
Long considered one of the more "primitive" species of Nepenthes,[7] recent molecular phylogenies have consistently placed N. pervillei in a basal position within the genus.[8][9][10][11][12]
Gallery
Offshoots bearing mature pitchers
References
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^ a b Clarke, C.M. (2018). "Nepenthes pervillei". IUCN Red List of Threatened Species. 2018: e.T39687A143963252. doi:10.2305/IUCN.UK.2018-1.RLTS.T39687A143963252.en. Retrieved 19 November 2021.
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^ (in Latin) Blume, C.L. 1852. Ord. Nepenthaceae. In: Museum Botanicum Lugduno-Batavum, sive stirpium exoticarum novarum vel minus cognitarum ex vivis aut siccis brevis expositio. Tom. II. Nr. 1. E.J. Brill, Lugduni-Batavorum. pp. 5–10.
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^ McPherson, S.R. 2009. Pitcher Plants of the Old World. 2 volumes. Redfern Natural History Productions, Poole.
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^ Nesbitt, H.H.J. 1979. A new anoetid (Acari) of the genus Creutzeria from the Seychelles. Canadian Entomologist 111(11): 1201–1205.
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^ Fashing, N.J. 2002. "Nepenthacarus, a new genus of Histiostomatidae (Acari: Astigmata) inhabiting the pitchers of Nepenthes mirabilis (Lour.) Druce in Far North Queensland, Australia" (PDF). (1.64 MiB) Australian Journal of Entomology 41(1): 7–17. doi:10.1046/j.1440-6055.2002.00263.x
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^ Carnivorous Plant Database: Nepenthes pervillei
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^ Macfarlane, J.M. 1927. The Philippine species of Nepenthes. The Philippine Journal of Science 33(2): 127–140.
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^ Meimberg, H., P. Dittrich, G. Bringmann, J. Schlauer & G. Heubl 2000. Molecular phylogeny of Caryophyllidae s.l. based on matK sequences with special emphasis on carnivorous taxa. Plant Biology 2(2): 218–228. doi:10.1055/s-2000-9460
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^ Meimberg, H., A. Wistuba, P. Dittrich & G. Heubl 2001. Molecular phylogeny of Nepenthaceae based on cladistic analysis of plastid trnK intron sequence data. Plant Biology 3(2): 164–175. doi:10.1055/s-2001-12897
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^ (in German) Meimberg, H. 2002. "Molekular-systematische Untersuchungen an den Familien Nepenthaceae und Ancistrocladaceae sowie verwandter Taxa aus der Unterklasse Caryophyllidae s. l." (PDF). Ph.D. thesis, Ludwig Maximilian University of Munich, Munich.
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^ Meimberg, H. & G. Heubl 2006. Introduction of a nuclear marker for phylogenetic analysis of Nepenthaceae. Plant Biology 8(6): 831–840. doi:10.1055/s-2006-924676
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^ Meimberg, H., S. Thalhammer, A. Brachmann & G. Heubl 2006. Comparative analysis of a translocated copy of the trnK intron in carnivorous family Nepenthaceae. Molecular Phylogenetics and Evolution 39(2): 478–490. doi:10.1016/j.ympev.2005.11.023
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Nepenthes pervillei: Brief Summary
provided by wikipedia EN
Nepenthes pervillei (/nɪˈpɛnθiːz pɜːrˈvɪliaɪ/; after Auguste Pervillé, French plant collector) is the only pitcher plant found in the Seychelles, where it is endemic to the islands of Mahé and Silhouette. It grows in rocky areas near granitic mountain summits, its roots reaching deep into rock fissures. The species has an altitudinal range of 350–750 m above sea level. Like all members of the genus, N. pervillei is dioecious, having separate male and female plants.
The mite Creutzeria seychellensis has been found in the pitchers of N. pervillei.
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