1914-] SOUTHEASTERN NORTH AMERICA. 173 



one species in the Wilcox and Fort Union : two in the OHgocene of 

 Europe: and two in the Pliocene of Spitzbergen, Spain, France, 

 Silesia, Austria, and Hungary. The distribution of Parrotia in the 

 past as far as it is known confirms the evidence derived from Ham- 

 mamelis for a North American origin for the family. 



The third genus with a geological history is Liquidambar, in 

 which upwards of twenty fossil species have been described. The 

 oldest known forms occur in the Eocene at such widely separated 

 points as Alaska, Oregon, Greenland and France. There are two 

 species in the OHgocene of Asia and Europe. There are nine or ten 

 Miocene species represented throughout Europe and North Amer- 

 ica (New Jersey to Oregon) and in eastern Asia. Three Pliocene spe- 

 cies are represented in Spain, France, Italy, Germany, Austria, Styria 

 and Slavonia. Typical fruits preserved in the Upper Pliocene of Ger- 

 many show how late the genus flourished in central and southern 

 Europe. Felix has described the petrified wood of Liquidamharoxylon 

 from the Tertiary of Hungary. The existing Liquidambar styraci- 

 flita is found in the Pleistocene of West Virginia, North Carolina 

 and Alabama and the eastern Asiatic species L. formosana occurs in 

 the Pleistocene of Japan. The genus Corylopsis also occurs in the 

 post-Miocene deposits of Japan. 



The family Rosacea includes about 90 genera and over 1,300 ex- 

 isting species, widely distributed and mostly in temperate regions. 

 Some of the genera like Cratccgus seem to be undergoing saltation 

 at the present time and hundreds of supposed species have been de- 

 scribed in the past few years. The tribe Chrysobalanoideae is con- 

 fined to the tropics and the Neuradoideae to the subtropics of Africa 

 and southwestern Asia. All of the other tribes of Rosaceae are 

 widely distributed and their modern and fossil distribution is with- 

 out especial significance for the present discussion. 



The only genus represented in the Wilcox is Chrysohalaniis with 

 two species that are evidently the prototypes of the still existing 

 forms. The latter are but two or three in number and as shrubs or 

 small trees they inhabit the sandy shores in the maritime regions of 

 Florida, tropical America and western tropical Africa. 



The Leguminosse as now segregated into 4 families constitutes 



