produces pitchers roughly intermediate in appearance between its parent species. The peristome is flattened and expanded, but to a lesser degree than in N. ovata. The speckles of N. spectabilis are present, but the pitchers have a much lighter colouration. Most examples of this hybrid grow terrestrially and some climb into the forest canopy. N. rigidifolia × N. spectabilis Several plants representing the cross N. rigidifolia × N. spectabilis have been recorded from an open rocky outcrop close to the type locality of N. rigidifolia. The hybrid differs from N. rigidifolia in having narrower pitchers with an infundibular base and distinct hip around the middle. On the other hand, the pitchers of this hybrid are broader than those of N. spectabilis and have a wider, expanded peristome. The richly coloured lower pitchers of N. rigidifolia × N. spectabilis superficially resemble those of N. macfarlanei. However, since that species is confined to Peninsular Malaysia, the two taxa are not easily confused. Other hybrids Four other natural hybrids with N. spectabilis have been recorded. These are N. gymnamphora × N. spectabilis, N. mikei × N. spectabilis, N. rhombicaulis × N. spectabilis, and N. spectabilis × N. tobaica. Notes References Further reading Bonhomme, V., H. Pelloux-Prayer, E. Jousselin, Y. Forterre, J.-J. Labat & L. Gaume 2011. Slippery or sticky? Functional diversity in the trapping strategy of Nepenthes carnivorous plants. New Phytologist 191(2): 545–554. Clarke, C.M. 2006. Introduction. In: Danser, B.H. The Nepenthaceae of the Netherlands Indies. Natural History Publications (Borneo), Kota Kinabalu. pp. 1–15. Dariana 2010. Keanekaragaman Nepenthes dan pohon inang di Taman Wisata Alam Sicikeh-Cikeh Kabupaten Dairi Sumatera Utara. M.Sc. thesis, University of North Sumatra, Medan. Harwood, P. & S. Lumb 1998. Nepenthes spectabilis on Gunung Sinabong. The Carnivorous Plant Society Journal 21: 62–63. Hernawati & P. Akhriadi 2006. A Field Guide to the Nepenthes of Sumatra. PILI-NGO Movement, Bogor. Mansur, M. 2001. In: Prosiding Seminar Hari Cinta Puspa dan Satwa Nasional. Lembaga Ilmu Pengetahuan Indonesia, Bogor. pp. 244–253. 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. Meimberg, H. 2002. Ph.D. thesis, Ludwig Maximilian University of Munich, Munich. Meimberg, H. & G. Heubl 2006. Introduction of a nuclear marker for phylogenetic analysis of Nepenthaceae. Plant Biology 8(6): 831–840. Meimberg, H., S. Thalhammer, A. Brachmann & G. Heubl 2006. Comparative analysis of a