Thislist ofNepenthes natural hybrids is a comprehensive listing of all recorded naturalhybrids involving species of thecarnivorous plantgenusNepenthes. Hybrids that are notendemic to a given region are marked with an asterisk.
Nepenthes hurrelliana andN. murudensis are of putative hybrid origin, but are considered species by mosttaxonomists, as they form stable, fertile populations independent of their original parent species. The same could be said for stable hybrids such asN × kinabaluensis. Indeed, species status has been proposed for this taxon in the past.[15]
Nepenthes natural hybrids recorded from thePhilippines. TheN. alata hybrids listed below involveN. alata in the broad sense (sensu lato); this polymorphic taxon has recently been split into a large number of daughter species that now form the so-called "N. alata group".[22][23]
Two natural hybrids have been recorded from Singapore:N. × hookeriana andN. × trichocarpa.[5] As such, all three species from Singapore are known to hybridise.
Of these, the only species that could conceivably hybridise in the wild areN. madagascariensis andN. masoalensis. Although the ranges of the two species used to meet nearCape Masoala, no natural hybrids have ever been recorded.[6]
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^Lee, C.C. 2002.Nepenthes platychila (Nepenthaceae), a new species of pitcher plant from Sarawak, Borneo.The Gardens' Bulletin Singapore54: 257-261.
^Lee, C.C. 2004.Nepenthes. In: Sarawak Bau Limestone Biodiversity. H.S. Yong,F.S.P. Ng and E.E.L. Yen (eds).The Sarawak Museum Journal Vol. LIX, No. 80; Special Issue No. 6: 71-77.
^abcCheek, M. & M. Jebb 2013. Typification and redelimitation ofNepenthes alata with notes on theN. alata group, andN. negros sp. nov. from the Philippines.Nordic Journal of Botany31(5): 616–622.doi:10.1111/j.1756-1051.2012.00099.x
^abcdCheek, M. & M. Jebb 2013. Recircumscription of theNepenthes alata group (Caryophyllales: Nepenthaceae), in the Philippines, with four new species.European Journal of Taxonomy69: 1–23.doi:10.5852/ejt.2013.69
^abcGronemeyer, T., F. Coritico, A. Wistuba, D. Marwinski, T. Gieray, M. Micheler, F.S. Mey & V. Amoroso 2014. Four new species ofNepenthes L. (Nepenthaceae) from the central mountains of Mindanao, Philippines.Plants3(2): 284–303.doi:10.3390/plants3020284
^abcGronemeyer, T., W. Suarez, H. Nuytemans, M. Calaramo, A. Wistuba, F.S. Mey & V.B. Amoroso 2016. Two newNepenthes species from the Philippines and an emended description ofNepenthes ramos.Plants5(2): 23.doi:10.3390/plants5020023
^Cheek, M. & M. Jebb 2013. Identification and typification ofNepenthes blancoi, withN. abalata sp. nov. from the western Visayas, Philippines.Nordic Journal of Botany31(2): 151–156.doi:10.1111/j.1756-1051.2012.00012.x
^abCheek, M. & M. Jebb 2013. TheNepenthes micramphora (Nepenthaceae) group, with two new species from Mindanao, Philippines.Phytotaxa151(1): 25–34.doi:10.11646/phytotaxa.151.1.2
^Cheek, M. & M. Jebb 2013.Nepenthes alzapan (Nepenthaceae), a new species from Luzon, Philippines.Phytotaxa100(1): 57–60.doi:10.11646/phytotaxa.100.1.6
^abcCheek, M. & M. Jebb 2014. Expansion of theNepenthes alata group (Nepenthaceae), Philippines, and descriptions of three new species.Blumea59(2): 144–154.doi:10.3767/000651914X685861
^Cheek, M., D.N. Tandang & P.B. Pelser 2015.Nepenthes barcelonae (Nepenthaceae), a new species from Luzon, Philippines.Phytotaxa222(2): 145–150.doi:10.11646/phytotaxa.222.2.7
^McPherson, S., J. Cervancia, C. Lee, M. Jaunzems, A. Fleischmann, F. Mey, E. Gironella & A. Robinson 2010.Nepenthes gantungensis (Nepenthaceae), a new pitcher plant species from Mount Gantung, Palawan, Philippines. In: S.R. McPhersonCarnivorous Plants and their Habitats. Volume 2. Redfern Natural History Productions, Poole. pp. 1286–1295.
^McPherson, S., G. Bourke, J. Cervancia, M. Jaunzems, E. Gironella, A. Robinson & A. Fleischmann 2011.Nepenthes leonardoi (Nepenthaceae), a new pitcher plant species from Palawan, Philippines.Carniflora Australis8(1): 4–19.
^Cheek, M. & M. Jebb 2013.Nepenthes ramos (Nepenthaceae), a new species from Mindanao, Philippines.Willdenowia43(1): 107–111.doi:10.3372/wi.43.43112
^Cheek, M. 2011.Nepenthes robcantleyi sp. nov. (Nepenthaceae) from Mindanao, Philippines.Nordic Journal of Botany29(6): 677–681.doi:10.1111/j.1756-1051.2011.01449.x
^Cheek, M. & M. Jebb 2013.Nepenthes samar (Nepenthaceae), a new species from Samar, Philippines.Blumea58(1): 82–84.doi:10.3767/000651913X673513
^Cheek, M. & M. Jebb 2013.Nepenthes ultra (Nepenthaceae), a new species from Luzon, Philippines.Blumea, published online on October 24, 2013.doi:10.3767/000651913X675124
^(in German) Micheler, M., T. Gronemeyer, A. Wistuba, D. Marwinski, W. Suarez & V. Amoroso 2013.Nepenthes viridis, eine neueNepenthes-Art von der Insel Dinagat, Philippinen.Das Taublatt76: 4–21.
^McPherson, S.R. 2011. The discovery ofNepenthes sp. 'Anipahan'. In:New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 330–345.
^Gronemeyer, T., A. Wistuba, V. Heinrich, S. McPherson, F. Mey & A. Amoroso 2010.Nepenthes hamiguitanensis (Nepenthaceae), a new pitcher plant species from Mindanao Island, Philippines. In: S.R. McPhersonCarnivorous Plants and their Habitats. Volume 2. Redfern Natural History Productions, Poole. pp. 1296–1305.
^Nerz, J., A. Wistuba, C.C. Lee, G. Bourke, U. Zimmermann & S. McPherson 2011.Nepenthes nigra, a new pitcher plant from Central Sulawesi. In: McPherson, S.R.New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 468–491.
^McPherson, S.R. 2011. Discovery of a new population ofNepenthes pitopangii. In:New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 506–515.
^Bianchi, A., C.C. Lee, M.R. Golos, F.S. Mey, M. Mansur, Y.M. Mambrasar & A.S. Robinson 2020.Nepenthes diabolica (Nepenthaceae), a new species of toothed pitcher plant from Central Sulawesi.Phytotaxa464(1): 29–48.doi:10.11646/phytotaxa.464.1.2
^Cheek, M. & M. Jebb 2016. A new section inNepenthes (Nepenthaceae) and a new species from Sulawesi.Blumea61: 59–62.doi:10.3767/000651916X691510
^Lee, C.C., A. Wistuba, J. Nerz, U. Zimmermann, A.P. Paserang & R. Pitopang 2011.Nepenthes undulatifolia, a new pitcher plant from South East Sulawesi. In: McPherson, S.R.New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 492–505.
^abMey, F.S., L.H. Truong, D.V. Dai & A.S. Robinson 2011.Nepenthes thorelii, an emended description and novel ecological data resulting from its rediscovery in Tay Ninh, Vietnam. In: McPherson, S.R.New Nepenthes: Volume One. Redfern Natural History Productions, Poole. pp. 104–131.
^Cheek, M., M. Jebb, B. Murphy & F. Mambor (2018).Nepenthes sectionInsignes in Indonesia, with two new species.Blumea62(3): 174–178.doi:10.3767/blumea.2018.62.03.03