The Virtual Petrified Wood Museum. Dedicated to the Exhibition and Educational Study of Permineralized Plant Material
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Tietea vs. Psaronius

Tree Fern
Tietea singularis
Bieland, Maranhao Province, Brazil
Pedra de Fogo Formation
Permian
17 cm x 15 cm
Tietea, above, has round, ovoid, or C-shaped vascular bundles in cross-section whereas Psaronius has sinuous bands of xylem.

Tree Fern
Psaronius brasiliensis
Bieland, Maranhao Province, Brazil
Pedra de Fogo Formation
Permian
15 cm x 14.5 cm

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