Nepenthes pitcher plants are native to parts of South East Asia, India, Madagascar and Australia. Also called “Monkey Cups” because monkeys occasionally drinking the fluid in the pitchers. The pitcher is actually a swelling of the mid-vein in the leaf. Insects are attracted to this because of nectar secretions and coloration. The slippery rim (peristome) and inner walls of the pitcher encourage insects to fall into the digestive fluid at the bottom of the trap. Nutrients are absorbed from this fluid which is why these plants do not need to be fertilized.