Cooksonia is an extinct grouping of primitive land plants. The earliest Cooksonia date from the middle of the Silurian (the Wenlock epoch); the group continued to be an important component of the flora until the end of the Early Devonian, a total time span of {Period span/brief|Wenlock|Early Devonian}. While Cooksonia fossils are distributed globa...
Found on
http://en.wikipedia.org/wiki/Cooksonia
[butterfly] Cooksonia is a genus of butterfly in the family Lycaenidae.Cooksonia is endemic to the Afrotropics. ...
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http://en.wikipedia.org/wiki/Cooksonia_(butterfly)
(from the article `community ecology`) ...been preserved, and also the oldest known vascular plant (a plant that possesses specialized tissues, allowing transport of water and nutrients as ... ...Urnochitina urna and Fungochitina kosovensis, first occur at or just above the base of the series. The earliest known simple vascular land pla...
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http://www.britannica.com/eb/a-z/c/137
Cooksonia is the oldest-known land plant. This primitive plant dates from Silurian period, about 428 million years ago Cooksonia was an erect plant with dichotomous branches and terminal sporangia (sacs that produce reproductive spores). Cooksonia fosils have been found in the USA, Canada and Czechoslovakia.
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
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