cyclopteris

Updated: May 27, 2025

Though no regular seams of coal were formed, the characteristic imbedded coal-plants are of the genera Cyclopteris and Alethopteris, agreeing with species occurring at much higher levels, and distinct from those of the antecedent Devonian group.

Sir Charles Lyell - The Student's Elements of Geology

Sphenopteris, or "wedge-fern," is the name applied to another coal-fern; glossopteris, or "tongue-leaf"; cyclopteris, or "round-leaf"; odonlopteris, or "tooth-leaf," and many others, show their chief characteristics in the names which they individually bear. Alethopteris appears to have been the common brake of the coal-period, and in some respects resembles pecopteris. Sphenopteris Affinis.

Edward A. Martin - The Story of a Piece of Coal: What It Is, Whence It Comes, and Whither It Goes

I see that river, with its trees and shrubs, all unknown now except in museums the vegetation of the Coal Period the lepidodendron, the lepidostrobus, the pecopteris, the neuropteris, the lonchopteris, the odontopteris, the sphenopteris, the cyclopteris, the sigellaria veniformis, the sphenophyllium, the calamites " Melick started to his feet. "There, there!" he cried, "hold hard, doctor.

James De Mille - A Strange Manuscript Found in a Copper Cylinder