Contributions to the Knowledge of the Older Mesozoic Flora of Virginia

Acrostichides rhombifolius appear Area Asterocarpus Virginiensis Baiera Baiera multifida base beds branches Bunbury Carbon Hill Carolinensis centimeters Cheirolepis Cheirolepis Münsteri Cladophlebis Clover Hill coal seam compound pinna compound sterile pinna Ctenophyllum Braunianum Cycadites cycads Cyclopteris decurrent Emmons Emmons's epidermis Equisetum Rogersi fertile pinnules figure forking Formation and locality.-Found Fragment frond fructification genus Geol GEOLOGICAL SURVEY gives horizon insertion Jurassic Laccopteris lateral nerves leaf leaflets leaves lobes Lockville lower magnified to show magnifolia main coal margin Mertensides bullatus middle nerve midrib narrow Neuropteris normal North Carolina nules obliquely older Mesozoic Oölite Pages Palissya Pecopteris Pinnules of Fig Plate Podozamites principal rachis Pseudodanæopsis Pterozamites represents resembles Rhætic ribs Richmond Coal Field right angles sandstone Schenk Schimper Schizoneura seen segments shale show nervation show the nervation slender sori spec species specimen sporangia stem strata subopposite summit thick Triassic tripinnate ultimate pinnæ upper Virginia fossil Virginia Mesozoic Walchia width Zamites