Detailed Rhus nigricans Green River Leaf Fossil

Description: This is a remarkably detailed example showing the venation quite clearly. The plate is solid and would make a nice display or collection piece. Sumacs are shrubs and small trees that can reach a height of 1–10 metres (3.3–33 ft). The leaves are spirally arranged; they are usually pinnately compound, though some species have trifoliate or simple leaves.

The Green River Formation holds one of the world’s richest depositories of fossil leaves, plants, vines and aquatic vegetation. My provider alone shows over seventy species he collects. Surely there are many more found. Not only is the variety of plant life phenomenal, the preservation is often superb.