The following line diagram shows the overall structure of the Nepenthes plant. Most Nepenthes follow the basic structure shown, although there are variations.
The Nepenthes plant consists of a stem. This stem is more pronounced as the plant enters the climbing phase, in which the stem can grow to significant lengths. It can take years for a seedling plant to enter the climbing phase, and some Nepenthes apparantly don't climb. A few Nepenthes send runners out, in which new plants will develop. New plants will also develop from the rootstock. Nepenthes will also send up new stems from the base of the main stem, and the main stem itself may fork into several additional stems. Leaves are attached to the main stem. The end of the leaf is continued with a tendril, from which a pitcher may be produced.