Koelreuteria dilcheri

Description

Koelreuteria dilcheri is an extinct golden rain tree species from the Eocene found in the western coastal region of the United States. Fruit fossils of the species have been recovered in Northern California and northeastern Washington. Early fossils were included within several species described based on leaf fossils but have not been found in organic attachment to foliage. The lack of connection lead to the separation of K. dilcheri into a separate morphospecies in 2013. Wind and water dispersal have been suggested as likely modes of seed spreading.