Nepenthes stenophylla/nɪˈpɛnθiːzˌstɛnoʊˈfɪlə/, or the narrow-leaved pitcher-plant,[5] is a tropical pitcher plant endemic to Borneo.[6] The species produces attractive funnel-shaped pitchers up to 25cm high.[7] It is listed as Least Concern on the IUCN Red List.[1]Nepenthes stenophylla belongs to the loosely defined "N.maxima complex", which also includes, among other species, N.boschiana, N.chaniana, N.epiphytica, N.eymae, N.faizaliana, N.fusca, N.klossii, N.maxima, N.platychila, and N.vogelii.[8]
The illustration of N. stenophylla from Danser's 1928 monograph, based on the type specimen of N. fallax[6]
Species of pitcher plant from Borneo
Nepenthes stenophylla
Upper pitchers of N. stenophylla growing along a logging road to Mount Murud
Nepenthes maxima var. lowii (Hook.f.) Becc. (1886)
Nepenthes sandakanensis J.H.Adam & Wilcock (1996)
Nepenthes sandakanensis var. eglandulosa J.H.Adam & Wilcock (1996)
Nepenthes sandakanensis var. ferruginea J.H.Adam & Wilcock (1996)
Nepenthes fallax
There has been confusion surrounding N. stenophylla and N. fallax[note a] ever since the latter was first described. Nepenthes fallax matches N. stenophylla in most respects, except for the shape of the lid; the type specimen of N. fallax has an orbiculate lid, whereas that of N. stenophylla is narrow. However, the original description of N. stenophylla was based on a plant raised from seed in a greenhouse in England, and the narrow shape of the lid could be an aberrant characteristic resulting from artificial growing conditions.[6]
In his seminal monograph "The Nepenthaceae of the Netherlands Indies", B. H. Danser treated N. fallax as a heterotypic synonym of N. stenophylla.[9] This interpretation has been supported by most subsequent authors.[6][7][10][11]Jan Schlauer, however, considers the taxa as two separate species based on the shape of the lid.[6][12][13] He suspects the taxon originally named as N. stenophylla may have later been named again as N. faizaliana.[14]
Nepenthes fallax has a separate conservation status of Vulnerable on the IUCN Red List.[15]
Natural hybrids
The following natural hybrids involving N. stenophylla have been recorded.
Robinson, A.S., J. Nerz & A. Wistuba 2011. Nepenthes epiphytica, a new pitcher plant from East Kalimantan. In: McPherson, S.R. New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 36–51.
Danser, B.H. 1928. The Nepenthaceae of the Netherlands Indies. Bulletin du Jardin Botanique de Buitenzorg, Série III, 9(3–4): 249–438.
Jebb, M.H.P. & M.R. Cheek 1997. A skeletal revision of Nepenthes (Nepenthaceae). Blumea42(1): 1–106.
McPherson, S.R. 2009. Pitcher Plants of the Old World. 2 volumes. Redfern Natural History Productions, Poole.
Bauer, U., C.J. Clemente, T. Renner & W. Federle 2012. Form follows function: morphological diversification and alternative trapping strategies in carnivorous Nepenthes pitcher plants. Journal of Evolutionary Biology25(1): 90–102. doi:10.1111/j.1420-9101.2011.02406.x
Beaman, J.H. & C. Anderson 2004. The Plants of Mount Kinabalu: 5. Dicotyledon Families Magnoliaceae to Winteraceae. Natural History Publications (Borneo), Kota Kinabalu.
Chung, A.Y.C. 2006. Biodiversity and Conservation of The Meliau Range: A Rain Forest in Sabah's Ultramafic Belt. Natural History Publications (Borneo), Kota Kinabalu. ISBN9838121169.
Clarke, C.M. 2006. Introduction. In: Danser, B.H. The Nepenthaceae of the Netherlands Indies. Natural History Publications (Borneo), Kota Kinabalu. pp.1–15.
Damit, A. 2014. A trip to Mount Trus Madi – the Nepenthes wonderland. Carnivorous Plant Newsletter43(1): 19–22.
Fretwell, S. 2013. Back in Borneo for giant Nepenthes. Part 1: Mesilau Nature Reserve, Ranau. Victorian Carnivorous Plant Society Journal107: 6–13.
Hazebroek, H.P. & A.K. bin Abang Morshidi 2002. A Guide to Gunung Mulu National Park: A World Heritage Site in Sarawak, Malaysian Borneo. Natural History Publications (Borneo), Kota Kinabalu.
Kurup, R., A.J. Johnson, S. Sankar, A.A. Hussain, C.S. Kumar & S. Baby 2013. Fluorescent prey traps in carnivorous plants. Plant Biology15(3): 611–615. doi:10.1111/j.1438-8677.2012.00709.x
Lee, C.C. 2000. Recent Nepenthes Discoveries. [video] The 3rd Conference of the International Carnivorous Plant Society, San Francisco, USA.
(in Indonesian) Mansur, M. 2007. Keanekaragaman jenis Nepenthes (kantong semar) dataran rendah di Kalimantan Tengah. [Diversity of lowland Nepenthes (kantong semar) in Central Kalimantan.] Berita Biologi8(5): 335–341. Abstract
McPherson, S.R. & A. Robinson 2012. Field Guide to the Pitcher Plants of Borneo. Redfern Natural History Productions, Poole.
Meimberg, H., A. Wistuba, P. Dittrich & G. Heubl 2001. Molecular phylogeny of Nepenthaceae based on cladistic analysis of plastid trnK intron sequence data. Plant Biology3(2): 164–175. doi:10.1055/s-2001-12897
Meimberg, H. & G. Heubl 2006. Introduction of a nuclear marker for phylogenetic analysis of Nepenthaceae. Plant Biology8(6): 831–840. doi:10.1055/s-2006-924676
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 Evolution39(2): 478–490. doi:10.1016/j.ympev.2005.11.023
Miyagi, I. & T. Toma 2007. A new mosquito of the genus Topomyia (Diptera, Culicidae) from a Nepenthes pitcher plant in a Bario highland of Sarawak, Malaysia. Medical Entomology and Zoology58(3): 167–174. Abstract
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