110 THE FLORA OF THE DAKOTA GROUP. 



Arct. (loc. cit.) the secondaries are sometimes seiiarated ))}• shorter, undulate 

 tertiaries which are not observable in those of Kansas. The leaves are 

 variable, according to age. Fig. 3 of our plate represents a very young 

 one. The median nerve is strong and continues downward to a tliick petiole 

 more than 2*"° long, preserved in Fig. 2. 



All the specimens figured and a number of otiiers come from the same 

 locality. The species is locally abundant in the Cenomauian of the United 

 States, and Heer reports it from Grreenland and also from Patoot, a some- 

 what higher stage of the Cretaceous, where it is found with Platanus affinis 

 Lesq., P. Newherrijaiia Heer, Ilex borealis Heer, Lauras plutonia Heer, etc. ; 

 all species also found in the Dakota Group. 



Habitat: Ellsworth County, Kansas. Nos. 64, 65, and 72 of the museum 

 of the University of Kansas. Collected by A. Wellington. 



DiOSPYROS APICULATA, Sp. nOV. 



PL XIV, Fig. 3. 



Leaf small, coriaceous, entire, elliptical, narrowed in the same degree 

 upward to an apiculate apex, downward to a short petiole; nervation thick 

 and deep, camptodrome. 



The leaf has the characters of Diospi/ros prhnceva Heer, as figured in 

 Fl. Foss. Ai'ct., vol. 7, PI. LXi, Fig. 5, but differs es})ecially in its smaller size, 

 the apiculate point and the more distant, o])posite secondaries. It is 3.5""° 

 long, including the short petiole, which is only 2°"" long, and is 17°"" broad 

 in the middle. 



The nervation is quite distinctly inarked; the secondaries, of which 

 there are six pairs, are subopposite, while even the smallest leaf of D. priitueva 

 has ten pairs of secondaries. The nervilles are strong, flexuous, divided 

 in the middle, anastomosing at right angles and thus forming large square 

 or polygonal areoles; the rigid median nerve is prolonged into a short, 

 apiculate point. 



Habitat: Ten miles northeast of Uelphos, Kansas. No. 4016 of the 

 collection of Mr. R. D. Lacoe. 



DiosPYROs AMBIGUA Lesq. 



Cret. and Tert. Fl., p. 60. 



J), anceps Lesq., Cret. Fl., p. 89, PI. vi. Fig. 6. 



