Neuropteris is an extinct seed fern that was widespread during the Carboniferous. They are often found where coal formed. A member of Cycadophyta Order Medullosales, they are believed most closely related to modern day cycads.
During most of the Pennsylvanian (325 to 286 million years ago), a large portion of North America supported lush, swampy forests. Lycopods made up the largest component of these forests and achieved gigantic size, growing to heights of more than 130 feet with supporting trunks measuring up to 6 feet or more in diameter. These plants are also called "scale trees" because of the distinctive diamond-shaped leaf scars that cover their outer bark midsection. Neuropteris, Sphenopteris, and Lyginopteris were three of the many of genus of pteridosperms or seed ferns. The seed ferns had undergone a large radiation, and many, many species existed, most of which have not been scientifically described in the fossil record. Now extinct, these diverse plants had foliage closely resembling that of modern ferns, but they reproduced by means of seeds rather than spores as modern ferns do today. The period from the Mississippian through the Pennsylvanian is often called the Age of Ferns.
Length - 6.3 cm
Width - 5.7 cm
Height - .4 cm