Maryland Geological Survey 137 



by the presence in the Upper Comanche or Washita division of a flora 

 which is unmistakably of Upper Cretaceous (Cenomanian) age, and 

 which is therefore omitted from the present discussion. 



The Black Hills Area 



The flora of the so-called Lakota formation of the Black Hills rim 

 in Wyoming and South Dakota may be considered in this place, although 

 it may be more properly referable to the Barremian since Dinosauria are 

 also present in these deposits/ The history of discovery has been given 

 in detail by Ward,'' who, with the collaboration of Fontaine, has been 

 mainly responsible for the elaboration of the flora. A list of the re- 

 corded species includes the following: 



Acrostichopteris adiantifoUa (Fontaine) Berry 



Acrostichopteris pluripartita (Fontaine) Berry 



Araucarites wyomingensis Fontaine 



Araucarites ? cuneatus Ward 



Asplenium Dicksonianum Heer (= OnycMopsis ?) 



CarpoUthus barrensis Ward 



GarpoUthus fasciculatus Fontaine 



CarpoUthus fcenarius Ward 



CarpoUthus montium-nigrorum Ward 



Cephalotaxopsis magnifoUa Fontaine 



CladophleMs parva Fontaine 



Cycadeoidea aspera Ward" 



Cycadeoidea cicatricula Ward 



Cycadeoidea Golei Ward 



Cycadeoidea colossaUs Ward 



Cycadeoidea dacotensis Macbride* 



Cycadeoidea excelsa Ward 



Cycadeoidea formosa Ward 



Cycadeoidea furcata Ward 



^ Lucas, A New Dinosaur Stegosaurus Marshi, from the Lower Cretaceous 

 of South Dakota, Proc. U. S. Natl. Mus., vol. xxiii, 1901, pp. 591, 592, pis. 

 xxiii, xxiv. 



^Ward, The Cretaceous Formation of the Black Hills as Indicated by the 

 Fossil Plants, 19th Ann. Rept. U. S. Geol. Surv., pt. ii, 1899, pp. 521-946, pis. 

 liii-clxxii. 



^ Ward, Elaboration of the Fossil Cycads in the Yale Museum, Amer. Journ. 

 Sci. (iv), vol. X, 1900, pp. 327-345, pis. ii-iv; Mon. U. S. Geol. Surv., vol. xlviii, 

 1906. pp. 315-326. 



* Macbride, T. H., A New Cycad, Amer. Geol., vol. xii, 1893, pp. 248-250, pi. xi. 



