Calamitaceae

(from the article `Sphenophyta`) ...1 metre (3 feet) tall, with small, wedge-shape leaves; 2 families: Sphenophyllaceae and Cheirostrobaceae.Order EquisetalesTwo families: ...
Found on http://www.britannica.com/eb/a-z/c/5

Calamitaceae

Calamitaceae is an extinct family of plants related to the modern horsetails. Some members of this family attained tree-like stature during the Carboniferous Period (around {Period span/brief|Carboniferous|-1}). The family takes its name from its principal genus Calamites. Because some proposed species are based on partial fossil records, it is no...
Found on http://en.wikipedia.org/wiki/Calamitaceae
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