In Nepenthes khasiana found in Assam/north east India, colourful lid of pitcher is formed by
 

Nepenthes is also called as tropical pitcher plants. It belongs to the genus of carnivorous plants in the family Nepenthaceae. It consists of a climbing stem called as tendril. It helps in climbing and protrudes from the tip of the leaf. The pitcher is a modified lamina which forms at the end of the tendril and possesses coloured lid which is formed by leaf apex to attract which attracts insects. It contains a fluid used to digest the prey.