Vetysidaceae

Vetysidaceae is a plant family name that has appeared in some botanical classifications to designate a small group of flowering plants. In modern, widely used classification schemes, the name is not recognized as a valid or distinct family, and the taxa once associated with Vetysidaceae are distributed among other families. The circumscription of the group has varied among authors, and there is no consensus on which genera, if any, belong to the family.

The taxonomic history is characterized by inconsistency: the name was introduced in historical literature and later treated differently by various botanists. Because of the lack of stable delimitation, there is no universally accepted set of diagnostic characters defining Vetysidaceae in current treatments. Consequently, most contemporary databases do not include Vetysidaceae as a recognized family, and it is typically encountered only in historical or nomenclatural discussions.

Etymology and type: the family name is formed by the standard suffix -aceae from a presumed type genus, but the exact genus used as the basis for Vetysidaceae varies across sources, contributing to the uncertain circumscription.

Distribution and diversity: due to its non-recognition in modern systems, there is little reliable information on the distribution, morphology, or species of Vetysidaceae. When cited, it usually appears in the context of taxonomic history rather than as a current, living classification.