CHAPTER VIII. 



PALEOBOTANICAL EVIDENCE AS TO THE EQUIVALENCE OF 

 THE BEDS IN THE EASTERN AND THE PLAINS PROVINCES. 



As evidence of the climatic conditions and the equivalence of the beds 

 in the two widely separated regions where plant remains occur, the fossil 

 plants are perhaps the most accurate' that can be used. The identification 

 of the several genera and species, while not final, has reached a stage where 

 dependence can be placed upon the lists as a w^hole. David White has 

 given a summary of the plants occurring in the Eastern Province which 

 may be taken as the standard for comparison with the other regions and 

 beds. 1 His list is as follows: 



Plants Recorded from the Conemaugh Formation (Pennsylvanian) : 



Cheilanthites (Sphenopteris) solidus (Lesq.) 



D. White. 



Cheilanthites obtusilobus (Brogn.) Gopp. 

 Cheilanthites squamosus (Lesq.) D. White. 

 Mariopteris sillimanni (Brogn.) D. White. 

 Mariopteris nenx>sa (Brogn.) Zeill. 

 Sphenopteris minutisecta Font, and I. C. 



White. 

 Sphenopteris (Crossotheca) ophioglossoides 



Lesq. 



Alethopteris serlii (Brogn.) Gopp. 

 Pecopteris unita Brogn. 

 Pecopteris villosa Brogn.? 



Pecopteris cf. jenneyi D. White. 

 Pecopteris oreopteridia (Scloth.) Sterab. 

 Pecopteris miltoni (Artis) Sternb. 

 Pecopteris polymorpha Brogn. 

 Pecopteris sp. D. White. 

 Neuropteris ovata Hoffm. 

 Neuropteris fimbriata Lesq. 

 Neuropteris scheuchzeri Hoffm. 

 Sphenophyllum majus Bronn. 

 Lycopodites pendulus Lesq. 

 Sigillaria fissa Lesq. 

 Lepidocystis vesicularis Lesq. 

 Cordaicarpon gutbieri (Gein.) Gr. 'Ery. 



Plants recorded from the Monongahela formation (Pennsylvanian): 



Maripoteris ? spinulosa (Lesq.) D. White. 

 Alethopteris aquilina (Schloth.) Goepp. 

 Pecopteris unita Brogn. 

 Pecopteris villosa Brogn. ? 

 Pecopteris cf. jenneyi D. White. 

 Pecopteris notata Lesq. 

 Pecopteris nodosa (Goepp.) Schimp. 

 Dicksonites pluckeneti (Schloth.). 



Neuropteris callosa Lesq. 

 Neuropteris crenulata Brogn. 

 Neuropteris grangeri Brogn. 

 Neuropteris scheuchzeri Hoffm. 

 Lescuropteris moorii (Lesq.) Schimp. 

 Aphlebia filiciformis (Guth.) Schimp. 

 Sigillaria menardi Brogn. 



List of fossil plants reported from the Dunkard formation (Permian): 



Diplothema pachyderma (Font, and I. C. 



White) D. White. 

 Sphenopteris minutisecta Font, and I. C. 



White. 

 Sphenopteris (Cymoglossa) breviloba (Font. 



and I. C. White) D. White. 

 Sphenopteris (Cymoglossa) formosa (Font, and 



I. C. White) D. White. 

 Sphenopteris (Cymoglossa) lobata (Font, and 



I. C. White) D. White. 



(Font. 



Sphenopteris (Cymogiossa) obtusifolia 



and I. C. White) D. White. 

 Sphenopteris lescuriana Meek. 

 Sphenopteris dentata Font, and I. C. WTiite. 

 Sphenopteris auriculata Font, and I. C. White. 

 Sphenopteris foliosa Font, and I. C. White. 

 Sphenopteris hastata Font, and I. C. White. 

 Sphenopteris acrocarpa Font, and I. C. White. 

 Sphenopteris sp.? Font, and I. C. White. 

 Pecopteris pluckeneti (Schloth.) Sternb. 



1 White, David, The Fossil Flora of West Virginia, West Virginia Geological Survey, vol. 

 V (A), part n, pp. 390-453, 1913. 



221 



