Largest carnivorous plant species

While definitively pinpointing the world’s largest carnivorous plant species is up for debate depending on your precise criteria, there is little argument that the winner in terms of overall plant size would be in the genus Nepenthes — tropical pitcher plants found mostly in parts of south-east Asia, particularly Indonesia, Malaysia and the Philippines. Often a massive vining plant in nature, some have been observed to climb as high as 25 m (82 ft) into the treetops, forming huge, clumped growths; this is according to Alastair Robinson, a field botanist and world-renowned expert on the genus. In deep forest situations, N. ampullaria (aka the narrow-lidded pitcher plant) has been observed making massive vine thickets, especially in western Sumatra, Indonesia.

The Nepenthes genus also boasts the largest carnivorous plant traps by volume. The giant montane pitcher (N. rajah) of Malaysian Borneo in particular has pitchers that can contain as much as 3.5 litres (118.3 fl oz) of water or 2.5 litres (84.5 fl oz) of digestive fluid. They have been known to consume animals as large as frogs, birds and even rats. One exceptionally large N. rajah pitcher, measuring 41 cm (1 ft 4.1 in) tall, was found on a plant encountered on 26 March 2011 during a Sabah Society visit to Mesilau, on the east ridge of Mount Kinabalu in Sabah province on Borneo. It was measured by Alex Lamb and then collected for preservation at Mesilau Headquarters.

The slender vine Triphyophyllum peltatum of tropical west Africa produces glandular carnivorous leaves during parts of its life (probably associated with flowering). While not overall extremely massive, this liana's long stems can obtain extreme lengths of up to 50 m (164 ft).