Which of the following is not a type of plant stem?

Explanation

Nodes are not a type of plant stem but rather a specific part of a stem. In botany, a node is a region on a stem where leaves, buds, or branches arise. It is a critical point along the stem where various structures are attached. The space between two adjacent nodes is referred to as an internode. Nodes are the points on a stem where leaves, branches, or buds emerge. They represent the areas of growth and attachment on a stem rather than being a distinct type of stem.