Cretaceous plant fossil?

[Lone Hunter]

Collected this in Eagle Ford formation, sure looks like leaf or leaves, there appears to be hollow stem at bottom. Not getting hopes up since they're not common but could it be?

[Rockwood]

Plant fossils tend to be flattened. The fact that it looks hollow likely indicates a trace fossil left after the sediment was deposited and stiffened to some degree. Rhizolith (root trace) is a possibility though.

[rocket]

think this are trace-fossils, too