The function of an internode is to link the nodes of a plant together. This allows food hormones and water to be distributed throughout the nodes of the plant.
Internodes are easily visible on a plant. They are the section of stem that runs from one node to the next. Many internodes separate the nodes of a plant by inches, while others are very closely spaced. The nodes of a plant are found at the base of any growth, such as a leaf bud or branch. There is normally a wider part of the branch or stem. When pruning a plant, it is crucial to cut just above the node on the internode. Cutting the node itself kills that area of the plant.