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Fossil fruit of the flowering plant *Koelreuteria allenii* from the late Eocene Florissant Flora of Florissant, Colorado. The fruits of *Koelreuteria* are inflated and somewhat leaflike in appearance. This specimen shows one segment of an inflated fruit. *Koelreuteria* (Sapindaceae, soapberry family), or golden raintree, is today native to Asia, although it may be seen in cultivation elsewhere. Specimen is from the Cornell University Paleobotanical Collection (CUPC), Ithaca, New York (#1584-5). Length of leaf is approximately 4 cm. Model by Emily Hauf.