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Dpaul7

By Dpaul7

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Sphenopteris fern

 

Sphenopteris fern

Eastern Kentucky, USA
Pennsylvanian Period (~ 330 million years ago)
Sphenopteris is a genus of seed ferns containing the foliage of various extinct plants, ranging from the Devonian to Late Cretaceous. The frond of Sphenopteris could be up to 20 inches (51 cm) long.
Kingdom: Plantae
Division: †Pteridospermatophyta
Class: †Lyginopteridopsida
Order: †Lyginopteridales
Family: †Lyginopteridaceae
Genus: †Sphenopteris

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