stemflow
Stemflow refers to the portion of precipitation that, after reaching a plant canopy, flows down the stems and trunks of plants to the ground. This process is distinct from throughfall, which is precipitation that passes directly through the canopy to the ground. Stemflow is influenced by the architecture and characteristics of the plant, including leaf size and shape, branching patterns, and the presence of hairs or waxes on the stem.
The amount of stemflow can vary significantly between different plant species and even within the same species