CONTENTS. 



Iiil rodiK'tion 5 



Scope of report 5 



Area covered by report 6 



Outline of geologic history 6 



The Midway (?) flora from Earle, Tex 8 



Midway formation 8 



Study of tlie stratigraphy 8 



Character and distribution 8 



Local sections 9 



Relations of the flora 9 



Systematic descriptions 11 



Order Urticales 11 



Order Platanales 13 



Order Ilanales 13 



Order Resales 14 



Order Myrtales 15 



The Wilcox flora 21 



Wilcox group 21 



Study of the stratigraphy 21 



Nomenclature 29 



Faunas 30 



Character, succession, and areal distribu- 

 tion 33 



Strati<;raphi<; relations 36 



The plant-bearing outcrops 38 



Sections in Mississippi 38 



Grenada, Grenada County 38 



Oxford, Lafayette County 39 



Holly Springs, Marshall County 41 



Early Cirove, Marshall County 42 



Hurleys, Benton County 42 



Potts Camp, Benton County 43 



Sections in Tennessee 44 



Grand Junction, Fayette County 44 



La Grange, Fayette County 45 



Pinson, Madison County 46 



Henry County 47 



Sections in Kentucky 50 



Mayfield, Graves County 50 



Wickliffe, Ballard County 51 



Sections in Arkansas 52 



Crowleys Ridge, Clay, (ireene, and 



Poinsett counties 52 



Benton, Saline County 53 



Malvern, Hot Spring County 54 



Ouachita County 54 



Sections in Louisiana 54 



Shrevei)ort, Caddo Parish 54 



Coushatta, Red River Parish 55 



Naborton, De Soto Parish 56 



Sections in Texas 57 



Old Port Caddo Landing, Harrison 



County 57 



Sabine River, Sabine County 58 



Calaveras Oeek, Wilson Coiinty 58 



Local distribution of the Wilcox flora 60 



Page. 

 The Wilcox flora — Continued. 



Character and ecology 72 



Composition of the flora 72 



Physical conditions 133 



Correlation 140 



Nomenclature 140 



Correlation of local sections within the 



Wilcox group 140 



Relation to Cretaceous floras 145 



Relation to the Midway ('.') flora 146 



Relation to the Claiborne flora 147 



Comparison of Wilcox flora with other 



American Eocene floras 147 



Purpose of the comparison 147 



Flora of the Raton formation 147 



Flora of the Denver formation 148 



The Fort Union flora 148 



Flora of the Greenland Tertiary 149 



Relation to European Eocene floras 149 



Distribution of Wilcox plants in other for- 

 mations 153 



Systematic descriptions '. 162 



Order Pyrenomycetes (V) 162 



(Jrder Lyco])odiales 163 



Order Filicales ,164 



Order Cycadales 169 



Order Coniferales 169 



Order Graminales 174 



Order Aralea 175 



Order Arecales 176 



Order Scitaminales 181 



Order Juglandales 182 



Order Myricales 188 



Order Fagales 189 



Order Urticales 193 



Order Proteales 207 



Order Aristolocliialos 211 



Order Polygonales 212 



(Jrder Chenopodiales 213 



Order Ranales 214 



Order Papaverales 218 



Order Resales 219 



Order Geraniales 251 



Order Sapindales 260 



Order Rhamnales 277 



Order Malvales 285 



Order Parietales 291 



Order Thymeleales 296 



Order Mvrtales 314 



Order Umbellales 327 



Order Primulales 332 



Order Ebenales 333 



Order (Jeiilianales 340 



Order Polemoniales 345 



Order Peisonalos 346 



Order Rubiales 348 



Incertae sedis 350 



Index 4G7 



3 



UAlti>'^>' 



3 



I 





