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Tietea vs. Psaronius
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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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