192 The Upper Cretaceous Floras of the World 



Rhamnus orstedi Heer 



Rhytisma hederw Heer 



Sapindus morrisoni Heer 



Sapindus prodromus Heer 



Sassafras arctica Heer 



Sassafras (Araliopsis) recurvation Lesq. 



Sciadopitytes nathorsti Halle 1 



Selaginella arctica Heer 



Sequoia ambigua Heer 



Sequoia fastigiata (Sternberg) Heer 



Sequoia reichenbachi (Geinitz) Heer 



Sequoia rigida Heer 



Sequoia subulata Heer 



Sparganium cretaceum Heer 



Tetraphyllum oblongum Heer 



Thuja cretacea (Heer) Newberry 



Thuites meriani Heer 



Thuites pfaffii Heer 



Widdringtonites reichii (Ettingshausen) Heer 



Widdringtonites subtilis Heer 



Williamsonia cretacea Heer 



Xylomites aggregatus Heer 



Zingiberites pulchellus Heer 



There is no need to attempt a botanical analysis of this flora since it has 

 been fully discussed by Heer. 2 It is, however, of very great importance 

 from the standpoint of correlation. Fourteen ferns and conifers range 

 up into the Atane beds from the older Kome series and 3-1 species 

 continue upward into the Patoot series. Compared with iSTorth American 

 Upper Cretaceous floras it is seen to contain 3 Washita species (the 

 Washita flora has never been studied), 15 Tuscaloosa species, 14 Black 

 Creek species, 47 Earitan species, 37 Magothy species, and 36 Dakota 

 species. Compared with European Upper Cretaceous floras it has 22 

 species in the Perucer beds of Bohemia and Moravia (Cenomanian), 14 

 at Niederschcena in Saxony (Cenomanian), 6 in the Turonian and 5 each 

 at Aachen and in the Westphalian Cretaceous. 



The very large number of definitely determined Cenomanian species 

 altogether precludes its reference to the Emscherian, as some students 



'Halle, T. G. ( Geol. Foren. Forhandl. Bd. xxxvii, 1915, p. 512, pi. xii, figs. 

 16-29. 



2 Heer, Fl. Foss. Arct, Bd. vii, 1883, pp. 157-207. 



