Contributions to the Knowledge of the Older Mesozoic Flora of VirginiaU.S. Government Printing Office, 1883 - 144 pages |
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... Stem of Cycad . Undetermined plants . Laccopteris Emmonsi . Acrostichides Egyptiacus . XLIX . - Lonchopteris oblongus . Asterocarpus platyrachis . Sphenozamites Rogersianus . Sagenopteris rhoifolia . Ctenophyllum Braunianum ...
... Stem of Cycad . Undetermined plants . Laccopteris Emmonsi . Acrostichides Egyptiacus . XLIX . - Lonchopteris oblongus . Asterocarpus platyrachis . Sphenozamites Rogersianus . Sagenopteris rhoifolia . Ctenophyllum Braunianum ...
Page 10
... Stem 6 to 9 centimeters thick , furrowed below the sheath for about 1 centime- ters , the rest of the internode smooth . Lower internodes shorter than the upper , with the length gradually increasing in ascending . Sheaths closely ...
... Stem 6 to 9 centimeters thick , furrowed below the sheath for about 1 centime- ters , the rest of the internode smooth . Lower internodes shorter than the upper , with the length gradually increasing in ascending . Sheaths closely ...
Page 11
... stem , and of its impres- sions on the shale , showing the smallest details with the nicety of a litho- graphic imprint . Plate II , Fig . 2 , represents a portion of the stem in which the internodes are short , and on which the ...
... stem , and of its impres- sions on the shale , showing the smallest details with the nicety of a litho- graphic imprint . Plate II , Fig . 2 , represents a portion of the stem in which the internodes are short , and on which the ...
Page 12
William Morris Fontaine. tened stem , showing the epidermis which is finely striated and marked by rather large , prominent ribs which cross the diaphragms with no change of direction . No indications of a sheath are to be seen . As it ...
William Morris Fontaine. tened stem , showing the epidermis which is finely striated and marked by rather large , prominent ribs which cross the diaphragms with no change of direction . No indications of a sheath are to be seen . As it ...
Page 13
William Morris Fontaine. stems , the smaller dimensions of the sheath , and the lesser number of the teeth and ribs . The ... stems of E. Rogersi . There may be a second Equisetum in the Richmond Coal Field , as the internal casts called ...
William Morris Fontaine. stems , the smaller dimensions of the sheath , and the lesser number of the teeth and ribs . The ... stems of E. Rogersi . There may be a second Equisetum in the Richmond Coal Field , as the internal casts called ...
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Common terms and phrases
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