Fine Eocene Catkin Plant Fossil

Description: The Green River Formation deposits of Wyoming, Colorado, and Utah are best known for their immaculately-preserved fish, but other examples are known as well, as this specimen attests. This specimen is known as a catkin. Catkins are an elongated cluster of same-sex flowers, and are found on many trees such as oaks, birches, and willows. They are wind pollinated (anemophilous) with male catkins pollinating female catkins, or single female flowers.