The plant is a desendant of Calamites which are some fossils shown in this entry. These fossils were found in West Virginia. They are from the Pennsylvanian period.
The cone or sporangim is used to disperse microscopic spores.
Neat cell pattern on cone.
Imprint of a Calamites leaves.
Here is a stem pattern that can be seen in a smaller version on the Equisetum.
Here is something that was on one side of the rock that looks like a bark pattern. The rock is brown but this fossil has been treated with a glaze that makes it shine.