156 



SHOETEK CONTKIBUTIONS TO GENERAL GEOLOGY, 1921. 



'Ilie flora, as at present knowni, is inadequate 

 to iiulieate the environment in wliicli the ph^nts 

 Uvod, but it clearly contains no unusual fea- 

 tures, and I can see no reasons for supposing 

 that the physical conditions were different 

 from those wliich have been predicat(Hi from 

 the much larger floras of the Tuscaloosa, Rari- 

 tan, and Magothy formations, which have been 

 discussed at length in various publications. 

 A systematic list of the Woodbine, flora at 

 Arthurs Bluff follows: 



Gymuospermae: 



Podozamil.es lanceolatiis ( Liiulley and llut- 



ton) F. Braun.. 

 Urachyphyllum inacrocarpum formosum 

 Berry. 

 I)icotyled<inae: 

 M\Ticales: 



Myricaceae: 



Myrioa emarginata Ileer. 

 Myrica longa (Heer) Heer. 

 Salicales: 



Salicaceae : 



Salix lesquereuxii I'x'rry. 

 Salix deleta Les<|uer('nx'.' 

 Populus harl;eriaiia Lcs(iucreiix. 

 Urticales : 



Moraceae: 



' Ficus dapliuogeiiciiili's (lii'cri lierry. 

 I-'icus glascoeana Lesi|Uorpux. 

 J'lataiiali-s: 



Platanareap: 



Plataiiu.-< latior (Lesquereux i Kiiowlton. 

 HaiiaU's: 



MagUdliaceae: 



Magnolia speciosa Heer. 

 Magnolia lacoeana Lesquercux. 

 Liriodendron quercifoliuin Xewlierry. 

 Trochodendi'aceae: 



Trochodendroides ihomboideus ( I.esquereu.x') 

 Berry. 

 Rauuuculaceae? 



Dewalquea insigniforini?< Herry. 

 Ilosales: 



(! 'aesal piniaceae : 



Palaeocassia laurinea Lesi|uereux. 

 Papilionaceae: 



Oolutea primordialis Heer. 

 Sapindales; 



Sapindaceae: 



Sapindus morrisoni Heer. 

 Anacardiaceae: 



Rhus redditiformia Berry. 

 Rhaninalea: 



Rhamnaceae; 



Rhamnu.s tenax Les(|uereiix. 

 Zizyphus lamarensi.-* lierry. 

 Vitaceae : 



Cissites formosus Heer. 



Dii-otyledonae — Continued. 

 Malvales: 



Sterculiaceae: 



Sterculia lugubris Lesquereux. 

 Tliymeleales: 

 Lauraceae: 



Benzoin venustum (Lesquereux") Knowlton. 

 Malapoenna falcifolia (Lesquereux"' Knowl- 

 ton. 

 Oreodaphne alaliamensis Berry. 

 Cinnamomuni newberrj-i Berry. 

 Cinnamomum membranaceum (Lesquereux) 



HoUick. 

 Laurus pltitonia Heer. 

 Laurus antecedens Lesquereux. 

 Laurophyllum minus Newberry. 

 Myrtales: 



MjTtaceae: 



Myrtonium geinitzi (Heer). 

 LTmbellales: 

 Araliaceae: 



Aralia wellingtoniana Le.tiquereux. 

 .\ralia sajKjrtana Lesquereux, 

 Cornaceae : 



Cornophylhim vetustum Newben-y. 

 Ericales?: 



iVndronieda novaecaesareae Hollick. 

 .\ndromeda snowii Lesquereu.x. 

 Ebenales: 



Ebenaceae : 



Diospyros primaeva Heer. 

 Rubiales: 



Caprifoliaci-ae: 



Viburnum roljustum Lesquereux. 

 Po.sition uncertain; 



Tricalycites pap\Taceus Newberry. 

 Carpolithus sp. 1, 

 Carpolithus sp. 2. 

 Caipolithus sp. 3. 



AGE OF THE FLORA. 



RELATION TO THE FLORAS OF OTHER UPPER 

 CRETACEOUS FORMATIONS OF THE COASTAL 

 PLAIN. 



Edatiini to tin' Biiigai mud flora. — The geo- 

 graphically nearest flora to that of the Wood- 

 bine santl is that found in the Bingen sand of 

 Arkansas. The Bingen is generally recognized 

 as being, in ])art, at least, the equivalent of the 

 Woodbine and also as representing all the 

 Upper Cretaceous of Arkansas below the 

 Exogi/ra ptnuhrom zone. The latter fact is of 

 especial importance in the final determination 

 of the age of the Woodbine, for if the Bingen in 

 its easternmost exposures represents the whole 

 of the interval represented in northern Texas 

 by the Woodbine and Eagle Fortl formations 

 there is no apparent reason why a part t)f the 



