I9U-] SOUTHEASTERN NORTH AMERICA. 191 



however, to abrogate the statement made by Schenk 33 and quoted by- 

 Pax 34 that there is no certain evidence of the existence of the Euphor- 

 biaceae 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 ; Euphorbioides based on an inflores- 

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

 ish Prussia; the genus Euphorbiophylhim 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- 

 tonophyllum 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 

 Pliyllanthus. Conwenz has described a euphorbiaceous flower from 

 the Baltic Amber (Sannoisian) as Antidesma maximozviczii and 

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

 Columbia as EupJwrbio.vylon. Hura-like 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 Mallotus 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- 

 him, CrotonopJiyllum 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 CrotonopJiyllum, Euphorbiophyllum and Drypctes. The 

 genus Crotonophyllum 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. 



