WILCOX EOCENE FLOKA 633 



CLAIBORNE (AUVER8IAN) EOCENE FLORA OF SOUTHEASTERN NORTH 



AMERICA 



The Claiborne flora as at present known comprises 78 species in 59 

 genera. Of this number 7 genera^ with 8 species, are considered as new 

 arrivals from tropical America. 



JACKSON (PRIABONIAN) FLORA OF SOUTHEASTERN NORTH AMERICA 



The known Jackson flora comprises 79 species in 60 genera. Of this 

 number C genera, with 6 species, are regarded as new arrivals from trop- 

 ical America. These are species of Phoenicites, Myristica, Burserites, 

 Dombeyoxylon, Ehizophora, and Calocarpum. In addition to these, 

 Palmoxylon lacunosum (linger) Felix of the Jackson is probably com- 

 mon to the lower Oligocene (Sannoisian) of the Island of Antigua. 



Catahoula and Vicksburg (Oligocene) Floras of North America 



The known flora from these formations is a small one, numbering but 

 24 described species in 15 genera. The only new genus derived from 

 tropical America is the genus Embothrites. Two species of palms, how- 

 ever, are common to the lower Oligocene of the Island of Antigua, an- 

 other is very close to an Antigua and Panama form, and a third occurs 

 in southern Mexico. There is in addition an undescribed petrified wood 

 in the Vicksburg that is common to Antigua. 



Tertiary Floras of South America 



The origin of such South American Eocene floras as are known at 

 present may well have been from Arctogfea; but if this was the case, as 

 seems probable, their ancestors reached South America during the Cre- 

 taceous, since they are found at a number of widely scattered localities in 

 rocks of earlier Tertiary age, namely, at Coronel, Chile f Santa Ana and 

 Caucathale, in Colombia;^ Tablayacu and Loja, in Ecuador,^ and near 

 Tumbez, in Peru^. Moreover, the evergreen beeches (Nothofagus) which 

 are found in the lands bordering the present Straits of Magellan^ appear 

 to be of northern, probably of Asiatic, origin. 



*H. Bngelhardt: Abh. Senck. Naturf. Gesell., vol. 16, hft 4, 1891, pp. 629-692, pis. 

 1-14. Abh. Sitz. Natunv. Gesell., Isis in Dresden, 1905, pp. 69-82, pi. 1. 



5 II. Engelhardt : Abh. Senck. Naturf. Gesell., vol. 19, 1895, pp. 1-47, pis. 1-9. 

 « Idem. 



^ Berry : Op. cit. 



8 C. von Ettingshausen : Sitz. k. Akad. Wiss. Wien, vol. 100, 1891, pp. 114-137, pis. 1. 2. 

 A. Gilkinet : Resultats voyage du S. Y. Belgica en 1897-1899, 1900. 

 A. Dusen : Svenska Exped. till Magellanslanderna, vol. 1, 1899, pp. 87-107. pis. 8-13. 

 XLVII — Bull. Geol. Soc. Am., Vol. 29. 1917 



