BOTANICAL CHARACTER. 39 



over 800 species are recorded. The Raritan flora furnishes 16 

 species, or 13% of the total, and these belong for the most part 

 to the various families into which the old family Leguminoseae 

 has been split by modern systematists. A large number of these 

 Raritan species are based upon leaflets, whose generic relations 

 are not determinable with certainty. Deserving of special men- 

 tion are the 2 species of Bauhinia which have such striking 

 bilobate leaves and which are well characterized and closely re- 

 lated to existing forms in the American tropics. 



The order Geraniales is represented in the upper Raritan of 

 South Amboy by a single specimen of Citrophyllum aligera 

 (Lesq.) Berry, a widespread species in the overlying Magothy 

 formation and in the Dakota Group, and with modern sub- 

 tropical affinities. 



In the order Sapindales there are 13 species, or 11% of the 

 total. They include a somewhat doubtful species of Acer, 2 

 of Ilex, and a Celastrus, which is very abundant and is charac- 

 teristic of the upper Raritan. The genus Celastrophylliun, which 

 appears in abundance in the Older Potomac flora of Maryland and 

 Virginia, is especially abundant in the Cretaceous of the Atlantic 

 Coastal Plain. There are 9 species in the Raritan flora, sev- 

 eral of which are especially well marked and some are of large 

 size. Cclastrophyllum crenatuui Heer ranged from Greenland 

 to South Carolina, and Cclastrophyllum N ezuherryanum Hollick 

 is an especially abundant leaf in the upper Raritan at South 

 Amboy, occuring also in the older Raritan deposits at Sayreville. 

 It has not been possible to determine from what horizons in the 

 Raritan CclastrophyUuni Brittoiiianum Hollick, and cretaceiim 

 Lesq. were collected, which is unfortunate, since the former has 

 also been found in the older Patapsco formation and the latter 

 in the younger Dakota Group. 



There are 5 species of Rhamjnales and i species of Parie- 

 tales in the Raritan, the genera present being Rhamnitcs, Hedera, 

 Cissites, and Passi flora. 



The order ]\'Iyrtales, which includes quite a number of herb- 

 aceous species in the modern flora of this region, is represented 

 in the Raritan by 6 species of Bucalyptus, 4 of which are 

 confined to. the upper Raritan at South Amboy. This genus has 



