[Geology2] New fossil Equisetum significant

Newly discovered plant fossil reveals more than age
PhysOrg.com [USA], May 4, 2011

Over 100 million years ago, the understory of late Mesozoic forests was
dominated by a diverse group of plants of the class Equisetopsida.
Today, only one genus from this group, Equisetum (also known as
horsetail or scouring rush), exists—and it is a prime candidate for
being the oldest extant genus of land plant. A discovery of a new fossil
Equisetum species now places this genus at 150 mya, living in an
environment where it still can be found today—hot springs.

http://www.physorg.com/news/2011-05-newly-fossil-reveals-age.html

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