Salix
[Willow Leaf Impression​ in Tuffaceous Siltstone]
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Photographed by Michael P. Klimetz
Oligocene

IDAHO
Photographed by Michael P. Klimetz
[Willow Leaf Impression​ in Tan Shale]
Eocene
Green River Formation

WYOMING
Salix cockerelli
Photographed by Michael P. Klimetz
Salix cockerelli
[Willow Leaf Impression​ in Tan Shale]
Eocene
Green River Formation

WYOMING