The Mount Apo form has been cultivated by Australian hobbyists since the early 1980s, the taxon being referred to as "N. sp. Philippines No. 2". Plants from Mount Pasian only entered cultivation much later.[12]
^ abcCheek, M. & M. Jebb 2013. Typification and redelimitation of Nepenthes alata with notes on the N. alata group, and N. negros sp. nov. from the Philippines. Nordic Journal of Botany31(5): 616–622. doi:10.1111/j.1756-1051.2012.00099.x
^ abCheek, M. & M. Jebb 2013. Recircumscription of the Nepenthes alata group (Caryophyllales: Nepenthaceae), in the Philippines, with four new species. European Journal of Taxonomy69: 1–23. doi:10.5852/ejt.2013.69
^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. & M. Jebb 2013. Nepenthes ultra (Nepenthaceae), a new species from Luzon, Philippines. Blumea, published online on October 24, 2013. doi:10.3767/000651913X675124