FLORA OF THE DAKOTA GROUP. 59 



municaled. Bat other leaves of the same characters, only a little smaller 

 (Nos. 694, 672, Museum Comp. Zool., Cambridge), have been found by 

 Chs. Sternberg, on Thomson Creek, 7 miles south of Fort Harker. 



Sassafras (Araliopsis) subiiitejji'ifoliuiu, Lesqx. 

 " U. S. Geol. Rep.," vi, p. 82, pi. iii, fig. 5. 



From a number of specimens more or less similar to those of the leaf 

 figured "U. S. Geol. Rep.," vi, I. c, I believe it represents only a deforma- 

 tion of S. cretaceum, especially of its variety obtusum. I have, however, 

 received quite recently, from North Kansas, leaves of Sassafras perfectly 

 entire or lobate on one side only, identical in shape and size with the 

 leaves of Sassafras officinale commonly found also entire, bilobate or tri- 

 lobate. They were sent by Mr. L. C. Mason, of Delphos. 



AEISTOLOCHIACE^. 



ARISTOIOCHIA, Tourn. 

 Aristolocliia deutata, Heer. 

 " Phyll. Crdt, du Neb.," p. 18, pi. ii, figs. 1, 2; Lesqx., " U. S. Geol. Rep.," vi, p. 87, pi. xxx, fig. 6. 



DIOSPYRINE^. 



SAPOTACITES, Ett. 



Sapotacites Haydeiiii, Newby. 

 " Later Ext. Fl.," Catal., p. 8 ; " Illustr.," pi. v, fig. 1. 



No description is given of this species. The leaf, of medium size, is 

 obovate, slightly emarginate at the obtuse apex; secondary nerves at an 

 acute angle of divergence, close, curved in passing up toward the borders, 

 divided by short oblique veins detached from both sides of the lateral nerves. 



Hab. — Nebraska. Dr. F. V. Hayden. 



DIOSPYROS, linn. 



Diospyios primteva, Heer. 



"Phyll. Cia. du Neb.," p. 19, pi. i, figs. G, 7; Newby., "Later Ext. Fl.," Catal., p. 8; "Illustr.," pi. HI, fig. 8. 



Leaves oblong-oval, very entire, rather obtuse at the apex; secondary reins flex- 

 uous, branching, camptodrome. 



The author compares it to his B. anceps of the European Miocene, 

 and to I). Alaskana of the same formation of Alaska. The species is not 

 rare in Kansas. 



