The Paleontology of North America

Horsetails and Relatives from North America

See images from the:

Calamites From the Carboniferous in California © 2004 UCMP	Calamites From the Carboniferous in West Virginia © 2003 Thomas Kammer	Annularia stellata From the Carboniferous in Illinois © 2003 Gary Andrashko, Illinois State Museum
Equisetum From the Jurassic in New York © 2003 Jane Picconi	Calamostachys schimper From the Carboniferous in Indiana © 2005 The Virtual Fossil Museum	Annularia From the Carboniferous in Illinois © 1995 UCMP