1.6" Pennsylvanian Fossil Fern (Lyginopteris) - Alabama

This is a 1.6" fossil fern (Lyginopteris), from the Pottsville Formation, Alabama. It is six pinnules (branch of leaflets). This specimen is very well preserved with individual lobes and venation visible. The reverse side has several leafs of another seed fern, Sphenopteris.

Lyginopteris and Sphenopteris are genera of seed fern that contain extinct species of fern that reproduced from seed as opposed to sporophyte reproduction of most modern ferns.