752 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



more or less ilistinctly wedge-shaped at l)ase, and is ubovate rather than 

 elliptical in shape. The nervation is similar in l)oth. 



1). hiiiKirciis'is is also like certain leaA'Cs df I). lnKclnisepaJa k\. I'n-., from 

 Florissant and the Fort Union group (tf Montana.' The leaves from the 

 Fort Union group are rather larger, and have the secondaries at a different 

 ano-le and are without the peculiar finer nervation. Tt seems best, however, 

 to keep them ilistinct, at least for the present. 



Habitat: Lamar River, between Cache and Calfee creeks; collected by 

 F. H. Knowlton, August, 1888. Fossil Forest; collected by Arnold Hague, 

 Wepteniber 24, 1X84. 



DiOSPYROS HAOUEI n. sp. 



PI. 0, fig. 3. 



Leaf coriaceous, ellii)tical, entire, obtuse at apex and liase; petiole 

 thick; midrib thick, tiexuose; secondaries about (1 pairs, alternate, very 

 irregular, the pair at the base of the blade thin, vanishiug near the margin, 

 next \r,\h- strongest, passing to the upper ])art, camptodrome, branching 

 on the outside and forming broad loops well inside the margin; upper 

 secondaries smaller, cam])to(lrome, forming l)road loops; nervilles sparse, 

 strong, percurrent; finer nervation obsolete. 



This species rests on the hue, nearly perfect leaf figured. It is 7 cm. 

 long, including the petiole, whicli is 14 nun. long and 2 nun thick. The 

 blade is nearly regularly ellii)tical in sliai)e and 3.3 cm. broad. The nerva- 

 tion is peculiar, as may be drawu from the description and figure. . All of the 

 secondaries except the lower pair are camptodrome, forming by union with 

 the one next al)0ve a, series of broad loops some distance inside the margin. 



This type of nervation is peculiar and is clearly that of Diospyros. It 

 approaclies quite closely to certain small-leaved forms of I). riri/iniana L. 

 Among fossil forms it somewhat resemldes Diospyros ohtnsa Ward," from 

 Sevenmile Creek, Montana, in the Fort Union group. The latter species 

 is of approximately the same size and shape, but differs in the details of 

 nervation. It is, however, quite close. 



I have named this s|)ecies in honor of ^Ir. Arnold Hague, of the United 

 States Greological Survey. 



'Cf. Lesquerens Cret. ;in<l Tert. FI., PI. XXXIV, lig. 1, 2; Ward, Types of the Larauiie FI., 

 PI. XLIX, fig. :,2. 



- Types of the Laramie FI., \k ILia, PI. XLIX, fig. 5. 



