Yimaia

Yimaia is a extinct genus of Ginkgoalean plant, and the only member of the family Yimaiaceae. In the botanical form classification scheme, it represents ovulate organs. It is distinguished from other Ginkgoales by the presence of "Ovulate organs consisting of a peduncle and up to eight or nine terminal, sessile, contiguous and orthotropous (straight, upright and with a micropyle at apex) ovules." the ovules are associated with leaves of the "Baiera" or "Ginkgoites" type morphology. Fossils have been found in Middle Jurassic deposits in China.