Nepenthes ramos Jebb & Cheek, sp. nov. is described and illustrated from Surigao Province, Mindanao, Philippines, and placed in the N. alata Blanco group. An updated key to the species of the group is provided. The new species is characterized by the subcylindric upper pitchers which are more or less equally wide at base and apex, only slightly and gradually constricted in the middle and lacking in fringed wings, and by the lower surface of the lid having a well-developed basal appendage almost lacking glands, the lid surface having dimorphic nectar glands, large perithecoid glands along the midline and much smaller non-perithecoid but bordered glands on the rest of the lid. The species is assessed as Critically Endangered using the IUCN 2001 standard. Logging and open-cast mining are thought to be threats to this species.
- M. Cheek 2011: Nepenthes robcantleyi sp. nov. (Nepenthaceae) from Mindanao, Philippines. — Nordic J. Bot. 29: 677–681 Google Scholar
- M. Cheek & M. Jebb 2001: Nepenthaceae. — In: Flora Malesiana, Series 1: Spermatophyta (seed pants) 15. — Leiden: National Herbarium of the Netherlands. Google Scholar
- M. Cheek & M. Jebb 2013: Typification and redelimitation of Nepenthes alata Blanco with notes on the N. alata group, and N. negros sp. nov. from the Philippines. — Nordic J. Bot. (in press) . Google Scholar
- IUCN 2001: IUCN red list categories and criteria: Version 3.1. Prepared by the IUCN Species Survival Commission. — Gland & Cambridge: IUCN. Google Scholar
- M. Jebb & M. Cheek 1997: A skeletal revision of Nepenthes. — Blumea 42: 1–106. Google Scholar