Astronium truncatum
Flower
Early Eocene
Green River Formation – Parachute Creek Member
Rio Blanco County, Colorado, USA

21mm flower on 50mm slab.

Flowers of the genus Astronium have been said to belong to plants in the Family Anacardiaceae which includes a variety of modern trees such as mango, cashew, pistachio, and pepper as well as poison ivy and poison oak.