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Stigmaria, the underground rooting structure of ancient tree-like lycopsids that lived in the Carboniferous/Pennsylvanian forests roughly 300 million years ago.
This specimen displays numerous distinctive rootlet attachment scars across the surface and beautiful natural sedimentary layering.
Reported provenance: Southwestern Indiana
Age: Pennsylvanian / Carboniferou
Stigmaria (lycopsid rooting structure)
