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Calamites

Calamites horsetail-trees. There is also some Lepidodendron in the background.

Calamites was a tree-like horsetail plant, which the modern horsetails (Equisetum) are closely related. It lived during Carboniferous and early Permian periods.

Unlike its modern cousins, Calamites was a medium-sized tree that grew up to more than 30 meters (100 feet) high. Calamites were components of Carboniferous swamps forests.

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