What kind of vestibule is a cucumber?

A cucumber is classified as a type of "false" or "accessory" vestibule in botanical terms. This refers to the fact that the cucumber's fruit develops from a single ovary but often has a fleshy layer surrounding it, which is typical in some types of berries. Specifically, cucumbers are categorized as pepos, which are fleshy fruits with a thick rind, characteristic of the gourd family (Cucurbitaceae).