N. E. Lagunday, M. J. G. Baul, R. P. Ansihagan, and V. B. Amoroso, “Nepenthes higaonon (Nepenthaceae), a new species of pitcher plant from the northern Mindanao, Philippines”, Phytotaxa, vol. 689, no. 2, pp. 285–290, Feb. 2025.