Contributions to the Knowledge of the Older Mesozoic Flora of Virginia

Acrostichides acute allied angle appear Area Asterocarpus attached base beds branches called centimeters character Cladophlebis closely Clover Hill coal common compound pinna Ctenophyllum described distinct Emmons Emmons's ends Equisetum feet fertile figure flora forking Formation fossil Fragment frond fructification genus Geol given gives going horizon impressions inches insertion lateral nerves leaf leaflets leaves length lobes locality lower magnified to show margin marked Mesozoic middle nerve midrib narrow natural nearly normal North Carolina obliquely occurs Pages Pecopteris pinna pinnæ Pinnules of Fig placed plant Plate portion preserved probably rachis represents resembles Rhætic rhombifolius ribs Rogers rounded sandstone Schimper seam seems seen segments separate shale shape show nervation shown side single slender slightly smaller sometimes sori spec species specimen stem sterile sterile pinna strata strong summit termination thick true ultimate pinnæ upper usually Virginia Virginiensis width