Nepenthes campanulata 9 Sept. 1957., Kostermans 13764 (K) 9 Sept. 1957., Kostermans 13764 (CANB) 9 Sept. 1957., Kostermans 13764 (BO) Isotype: 9 Sept. 1957., Kostermans 13764 (A) Holotype: 9 Sept. 1957., Kostermans 13764 (SING) 9 Sept. 1957., Kostermans 13764 (L) 9 Sept. 1957., Kostermans 13764 (KEP) 9 Sept. 1957., Kostermans 13764 (BM) 9 Sept. 1957., Kostermans 13764 (NY)