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| Chaloneria cormosa is an Upper Pennsylvanian lycopod that shares a number of features with lepidodendrids except it was smaller and unbranched. It also had a bilateral cormose plant base like modern Isoetes instead of an elongate stigmarian rooting system. Chaloneria has been reconstructed as a "whole plant" from the Upper Pennsylvanian Steubenville, Ohio coal ball site. |
| In this photo you can see a longitudinal section of a Chaloneria plant base. You are mostly seeing the secondary xylem or wood. The diagonally arranged light areas with little dots are the leaf traces. At the bottom of the photo you can see root traces pointing downward. |
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