1914.] SOUTHEASTERN NORTH AMERICA. 191 



however, to abrogate the statement made by Schenk^^ and quoted by 

 Pax^^ that there is no certain evidence of the existence of the Euphor- 

 biacese during the Tertiary. The following genera have been re- 

 corded as represented in the fossil state. 



Euphorbia with a single species based upon a fruit described by 

 Heer from the Swiss Miocene ; Eiiphorbioides based on an inflores- 

 cence described by Wessel and Weber from the Aquitanian of Rhen- 

 ish Prussia ; the genus EtiphorbiophyUum with several species to be 

 noted presently ; I have described a very characteristic species of 

 Manihotites from the Upper Cretaceous of Georgia; the genus Cro- 

 tonophylhmi has several Upper Cretaceous and Eocene species ; 

 Cluytia is reported from the Eocene of the Isle of Wight and the 

 Oligocene of Saxony and Rhenish Prussia ; the following genera 

 each with a single species were identified by Ettingshausen from the 

 Miocene of Bohemia, i. e., Adenopcltis, Baloghia^ Omalanthus and 

 Phyllanthus. Conwenz has described a euphorbiaceous flower from 

 the Baltic Amber (Sannoisian) as Antidesma maximozuncsii and 

 Felix has described petrified wood from the Tertiary of the U. S. of 

 Columbia as Euphorbioxylon. Hura-Wko. fruits are also recorded 

 by Knowlton from the lower Eocene (Raton formation) of New 

 Mexico. Engelhardt has recorded species of Omphalea Linne, Tet- 

 raplandra Baillon and Mallotiis Lour., from the early Tertiary of 

 Chili. 



While difference of opinion regarding the determination of some 

 of these records is justifiable I regard Manihotites, Euphorbiophyl- 

 lum, Crotonophylliim and Euphorbioxylon as definite evidence of the 

 existence of the Euphorbiaceae during the Upper Cretaceous and 

 Tertiary. 



The Wilcox species are five in number and are referred to the 

 genera Crotonophylliim, Euphorbia phyllum and Drypctes. The 

 genus Crotonophyllnm was proposed by Velenovsky for a well- 

 marked species from the Cenomanian of Bohemia. I have described 

 a second species from the Upper Cretaceous of South Carolina. Two 

 species are recognized in the Wilcox and of these Crotonophyllum 



33 Schenk, " Palseophytologie," pp. 594-597, 1890. 



34 Pax, in Engler and Prantl's " Naturlichen Pflanzenfamilien," 1890. 



