synsepalous

Synsepalous refers to a floral characteristic where the sepals of a flower are fused together for at least part of their length. This fusion is in contrast to flowers where the sepals are separate and distinct, a condition known as polysepalous. When sepals are synsepalous, they often form a cup-like or tubular structure at the base of the flower, enclosing the base of the petals and reproductive organs. The degree of fusion can vary; in some cases, only the very bases of the sepals are joined, while in others, they may be fused for their entire length, forming a distinct calyx tube. This fusion is a common feature in many plant families, influencing the overall shape and appearance of the flower and potentially playing a role in attracting pollinators or protecting the developing bud. The term is derived from the Greek words "syn" meaning together and "sepalon" meaning sepal.