Psaronius was a Marattialean tree fern which grew to 10m in height, and is associated with leaves of the organ genus Pecopteris and other extinct tree ferns. Originally, Psaronius was a name for the petrified stems, but today the genus is used for the entire tree fern. Psaronius tree fern fossils are found from the Carboniferous through the Permia...
Found on
http://en.wikipedia.org/wiki/Psaronius
(from the article `Marattiaceae`) The genus of extinct ferns Psaronius, from Carboniferous and Permian times (roughly 360 to 250 million years ago), is considered to be either a ...
Found on
http://www.britannica.com/eb/a-z/p/126
No exact match found.
