Phoenix windmillis
Flower
Early Eocene
Green River Formation
Rio Blanco, Colorado, USA

Rare 9mm palm flower on 38mm slab with counterpart.

Fossil Palm Flowers from the Eocene of the Rocky Mountain Region with Affinities to Phoenix L. (Arecaceae: Coryphoideae)
Author(s): Sarah E. Allen, International Journal of Plant Sciences,
Vol. 176, No. 6 (July/August 2015), pp. 586-596