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Sphenopsida (horsetails, scouring rushed, calamites)

Calamite plants were similar to modern horsetail rushes, but some grew as trees over 100 feet tall. The common calamite tree fossil is represented by the genus Calamites. Modern horsetail rushes don't generally get larger than 4 or 5 feet tall.

 

 

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Last modified September 21, 2006 .