The species is native to northern and central Mindanao as well as neighbouring Dinagat[7] and Samar.[8] Its presence in southern Mindanao is uncertain.[7] It inhabits coastal forest areas on steep slopes[1] at elevations of 0–1100 m above sea level.[9]
^Macfarlane, J.M. 1911. New species of Nepenthes.Contributions from the Botanical Laboratory of the University of Pennsylvania3(3): 207–210. (plates I–II)
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
Beveridge, N.G.P., C. Rauch, P.J.A. Keßler, R.R. van Vugt & P.C. van Welzen 2013. A new way to identify living species of Nepenthes (Nepenthaceae): more data needed! Carnivorous Plant Newsletter42(4): 122–128.
Cantley, R. 2000. Nepenthes of the Philippines. [video] The 3rd Conference of the International Carnivorous Plant Society, San Francisco, USA.
Cheek, M. & M. Jebb 2013. Nepenthes ramos (Nepenthaceae), a new species from Mindanao, Philippines. Willdenowia43(1): 107–111. doi:10.3372/wi.43.43112
Co, L. & W. Suarez 2012. Nepenthaceae. Co's Digital Flora of the Philippines.
(in German) Gronemeyer, T. 2008. Nepenthes auf den Philippinen – Ein Reisebericht. Das Taublatt60(1): 15–27.
(in German) Gronemeyer, T. & V. Heinrich 2008. Wiederentdeckung von Nepenthes surigaoensis am Naturstandort auf den Philippinen. Das Taublatt60(1): 28–33.
Kurata, S. & M. Toyoshima 1972. Philippine species of Nepenthes. The Gardens' Bulletin Singapore26(1): 155–158. Abstract
Macfarlane, J.M. 1927. The Philippine species of Nepenthes. The Philippine Journal of Science33(2): 127–140.
(in German) McPherson, S. & T. Gronemeyer 2008. Die Nepenthesarten der Philippinen Eine Fotodokumentation. Das Taublatt60(1): 34–78.
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
(in Japanese) Oikawa, T. 1992. Nepenthes merrilliana Macf.. In: Muyū kusa – Nepenthes (無憂草 – Nepenthes). [The Grief Vanishing.] Parco Co., Japan. pp. 58–59.