106 



LARAMIE FLORA OF THE DENVER BASIN. 



Subsequent study of the Laniniie flora, 

 however, does not bear out this suggestit)n. 

 for so far as now known tlie two floras contain 

 no sjjecies in eonniion. This is also the view 

 reached b}- Berry,'' who pohited out that of the 

 123 Patoot species 20 occur in tlie Dakota 

 sandstone, 22 in the Karitan, 19 in the Mago- 

 thy, 8 ui the Tuscaloosa, and 4 in the Black 

 Creek formation. He says: "The large num- 

 ber of Atane species present (34), as well as 

 the numerous Dakota, Raritan, and Magothy 

 species, precludes considering the flora as 

 young as, for example, the Laramie." 



It may be accepted, then, tliat the Laramie 

 flora is younger than that of the Patoot series 

 and there is little or no relation between them. 



RELATIONS TO THE UPPER CRETACEOUS OF 

 EUROPE. 



As a preliminary to the consideration of the 

 possible relations between the flora of the 

 Laramie and such floras as are available in the 

 European Upper Cretaceous, it may be of 

 interest to give a brief tabular view of the 

 Uj)per Cretaceous section that is now (|uite 

 generally accepted. It is taken in the main 

 from the fifth edition of De I.,apparent's 

 Geology : 



Danian. 



Aturian/-^'^««t"'^.''^i^"\Upper Senonian. 

 U, am pa man 1 



Emscheriau/' I Lower Senonian. 



\('oniacianJ 



T, • fAnKoumian. 

 Turoniaiu . '' . 



ILigerian. 



(jenomanian. 



The Campanian, the h)\ver division of the 

 Aturian (Upper Senonian), is thought to 

 correspond approximately to the Pierre shale 

 and the Fox Hills sandstone of the United 

 States. The Maestrichtian, which constitutes 

 the upper division of the Aturian dapper 

 Senonian), together with the Danian, corre- 

 sponds to the Laramie, at least in position; 

 The Maestrichtian is abundantly plant-bearing 

 at a number of localities, especially in the 

 Mi'inster Basin of Westphalia. The plants 

 from these localities — Sendenhorst, Haldene, 

 Lunfiide, etc. — were studied and described 



" B^rry, E. W;, Maryland Geol. Survey, Upper Cretaceous, p. 196, 

 1916. 



spec ially by Hosius '* and by Hosius and 

 \'on der Marck." 



E. W. Berry,^" in a chapter on the Upper 

 Cretaceous floras of the world, has compiled 

 a complete list of the Maestrichtian ilora of 

 the Miinster Basin, which is as follows: 



Apocynoi)hyllum cuneatnm Hosius and Von der 



Marck. 

 Apocynophyllum subrepandum Von der Marck: 

 Aralia denticulata Hosius and Von der Marck. 

 Cf. Ceanothus sp. 



Chondrites l'\ircilontus latior Von der Marck. 

 Chondrites intricatus Sternberg. 

 C'hori<.lrites jungiforniis Debey and Ettingshausen. 

 Chondrites polymorphus Hosius and Von der Maick. 

 Chondrites subcurvatus Hosius and Von der Marck. 

 Comptonia tenera Hosius and Von der Marck. 

 Cunninghaniitos elegans (Corda) Endlicher. 

 Cunninghamites squamosus Heer. 

 Dewalquea gelindensis Saporta and Marion. 

 Dewalquea haldemiana Saporta and Marion. 

 Dewalquea haldemiana angustilolia Husius and 



Von der ilarck. 

 Dewalquea haldemiana latifolia Hosius and Von 



der Marck. 

 Dewalquea insignis Hosius and Von der Marck. 

 Dryandroides haldemiana Hosius and \'on der 



Marck. 

 Dryandroides macrophylla Hosius and XOn der 



Marck. 

 Eolirion? nervosum Hosius and Von der Marck. 

 . Eolirion primigenura Schenck? 



Eolirion? subfalcatum Hosius and \'on der Marck. 

 Eucalvqitus haldemiana Debey. 

 Eucalj-ptus inaequilatera Von der Marck. 

 Ficus angulata Hosius and Von der Marck. 

 Ficus densiner\'is Hosius and Von der Marck. 

 Ficus laurifolia Hosius and Von der Marck. 

 Frenelopsis konigii Hosius and Von der Marck. 

 HaUserites contortuplicatus Von der Marck. 

 Laurus aftinis Hosius and Von der Marck. 

 Myrica leiophylla Hosius and Von der Marck. 

 MjTica primaeva Hosius and Von der Marck. 

 Cf. Myrtophyllura cryptoneuron Saporta and 



Marion. 

 Nerium rohlii Von der Marck. 

 Cf. Oreodaphne apicifolia Saporta and Marion. 

 Osmunda haldemiana Hosius and Von der Marck. 

 Pinus monaBteiiensis Ho.sius and ^'on der Marck. 

 Populus tremulaeformis Hosius and Von der Marck, 

 Pisidonia cretacea Hosius and Von der Marck. 

 Quercus asymetia Hosius and Von der Marck. 



18 Hosius, \., Die in tier We'tfiilisehcn Kreidefonnation vorkomnien 

 Jen Pflanzenre.^te Miinster, pp. 1 34. isilit: I'eber einige Dii'otyloionen 

 der \\*c.-!tfiilischen Kreideformatlon: Palaeontographica, vol. 17, pp. 

 83-104, pis. 12-17, isr.g. 



19 Hosius, .\., and Von der Marek. Die flora der Wc'tfalisehen Kreide- 

 lormation: Palaoontograpliica, vol. 20, pp. 125-250, pis. 24 44, 1S80. 



™ Maryland Oeol. Survey, ITpper Cretaceous, j). 2S3, lOHi. 



