Uniseptate

Uniseptate is a term used in botany to describe a type of leaf venation pattern. In uniseptate venation, the midrib of the leaf is accompanied by a single, prominent vein that runs parallel to it. This vein is typically located on one side of the midrib, hence the term "uniseptate," which means "one side." This venation pattern is characteristic of certain plant families, such as the Asteraceae (daisy family) and the Compositae (daisy family). The uniseptate venation pattern is often associated with the presence of a pappus, a tuft of hairs or scales found on the head of composite flowers. This venation pattern is distinct from other types of leaf venation, such as parallel venation, pinnate venation, and palmate venation. The uniseptate venation pattern is an important characteristic used in the identification and classification of plants.