154 DESCRIPTION OF SPECIES. 



with a short thick petiole. The lateral nerves are much curved in passing 

 to the borders, close, craspedodrome. 



Hah. — Florissant. Lacoe's Collection, No. 64. 



Quercus Dryuieja, Ung. 



Plate XXVIII, Fig. 12. 

 "U. S. Geol. Rep.,'' p. 157, pi. xix, fig. 14. 



Among the numerous figures given of this species this leaf is espe- 

 cially comparable to Ung., "Ghlor. Prot.," pi. xxxii, fig. 1, and to "Fl. of 

 Sotzka," pi. ix, fig. 1. The lateral veins are mostly craspedodrome, the 

 lower pairs entering the teeth by an anastomosing veinlet. The species 

 is very common in the Miocene of Europe. The reference of the frag- 

 ment of leaf described, vol. vii, loc. cif., is not certain. 



//«6.— Randolph Co., Wyoming. U. S. Geol. Expl. Dr. F. V. Hayden 



Quercus Osbornii, sp. uov. 



Plate XXXVIII, Fig. 17. 



Leaf small, obovate, abruptly long-acumiuate, dentate from under the acumen 

 to the middle; medial nerve thin; secondary nerves oblique, alternate, parallel, camp- 

 todrome. 



This fine leaf, about 7 centimeters long, is gradually narrowed from 

 above the middle to the base (broken), rounded in the upper part, there 

 cut by three or four large teeth, and then abruptly long-acuminate. The 

 lateral nerves diverging 30° to 40°, curve in passing up to the borders, 

 which they follow in festoons, entering the teeth by anastomosing branch- 

 lets. I do not find any other species comparable to this but Quercus 

 Tephrodes, Ung., as described in "Sieber, Nord-Bohm. Braun-Kohl.,"" pi. 

 iii, fig. 17. Quercus hexagona, Lesqx., "U. S. Geol. Rep.," vi, pi. v, fig. 8, is 

 also of the same type. 



Hah. — Florissant. Princeton Collection, No. 684. 



Quercus pyrifolia, ep. nov. 



Plate XXVIII, Fig. 14. 



Leaves rather thin, oval, short-acuminate, rounded in narrowing to a long petiole; 

 borders irregularly obscurely serrate; secondary nerves curving in passing to the bor- 

 ders, camptodrome, crossed by nervilles at right angles. 



The petiole of the leaf is IJ centimeters long, and the leaf without it 



