Cross section of a fossil fern trunk, ± 31x17.1 cms. Very beautiful, original color. Supplied with exhibition foot.
* Tietea singularis: Arborescent fern, in which the conducting vessels can be distinguished in the central zone and around the parenchyma where the substances are stored.
Carboniferous-Permian, Pedro do Fogo Formation
Bieland, Maranhao Province, Brazil