A free field guide to Borneo's pitcher plants — 22 Nepenthes species confirmed native to the island, from the giant Rajah Pitcher Plant to the mammal-feeding Low's Pitcher Plant, each with photographs and identification notes. Nothing to buy and nothing to sign up for.
Borneo is one of the centres of Nepenthes diversity worldwide, with species ranging from lowland peat-swamp specialists like the Flask Pitcher Plant to the extraordinary montane endemics of Mount Kinabalu — the Rajah Pitcher Plant, the world's largest, and the Hairy Pitcher Plant, found nowhere else on Earth. Several Bornean species have evolved unusual feeding strategies beyond simply trapping insects, including Low's Pitcher Plant, which catches falling droppings from tree shrews feeding on its lid.
This guide covers only species genuinely native to Borneo — several Nepenthes commonly sold or photographed under a "Borneo" label are actually endemic to Sumatra, Sulawesi or the Philippines, and are not included here.
Mount Kinabalu is the single best site for montane pitcher plants, with the Rajah, Hairy and Kinabalu Pitcher Plants all found along its upper trails. Lowland species like the Fanged and Flask Pitcher Plants are more widespread, turning up in peat swamp and heath forest across Sabah, Sarawak and Kalimantan.
Each card has two colour-coded toggles:
turns lime green — adds it to your trip planner
turns blue — marks it as seen in my sightings