× N. rhombicaulis ? N. gymnamphora × N. rhombicaulis N. ovata × N. rhombicaulis N. rhombicaulis × N. spectabilis N. rhombicaulis × N. tobaica References Further reading 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 Biology 25(1): 90–102. 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. Hernawati & P. Akhriadi 2006. A Field Guide to the Nepenthes of Sumatra. PILI-NGO Movement, Bogor. 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 translocated copy of the trnK intron in carnivorous family Nepenthaceae. Molecular Phylogenetics and Evolution 39(2): 478–490. Robinson, A. 1995. Nepenthes rhombicaulis. CPS News 1995(3): 10. External links Nepenthes rhombicaulis in its natural habitat Carnivorous plants of Asia rhombicaulis Endemic flora of Sumatra Threatened flora of Asia Plants described in 1973 Vulnerable plants