706 GEOLOGY OF THE YELLOWSTONE NATIONAL PAKK. 



percurrent or forked and broken; finer nervation beautifully preserved, 

 forming quite regular, large areola?. 



This beautiful species is represented by a considerable number of more 

 or less perfect leaves, the best of which is figured. This figured example 

 is 11 cm. in length and nearly 6 cm. in width. Others are only 7 cm. long 

 and 3.5 cm. wide. None larger than the one figured were obtained. 



One of the marked features of this species is the number of teeth, 

 there being quite regularly twice as many as the number of secondaries. 

 These intermediate teeth are usually a little smaller than the others, and 

 are supplied with a branch from the middle of a strong nerville, which 

 crosses between 2 secondaries at some distance below the margin. This 

 character is so constant and so peculiar that it may even be of generic 

 value, but for the present the species may be retained in the genus Quercus. 



This species has a more or less close resemblance to a number of 

 described fossil forms. It is, for example, somewhat like Quercus viburi/i- 

 folia Lx., 1 from Golden, Colorado, Black Buttes, Wyoming, etc. This is 

 more wedge-shaped at base, has more irregular teeth, which are supplied 

 by branches from the forking secondaries. Quercus gronlandica Heer 2 as 

 figured from Spitsbergen also belongs to this group, but is a much larger 

 leaf, with relatively smaller teeth and forked secondaries. 



The very much larger leaf figured by Newberry as a young form or 

 variety of Platanus haydenii Newby 3 ., and coming from the Fort Union 

 beds at the mouth of the Yellowstone, also belongs near this group. It is 

 impossible to see any generic, or even specific, differences between this 

 figure of P. haydenii and Heer's figure above referred to of Quercus 

 gronlandica. They must certainly be the same. 



All of the species mentioned seem to be veiy close to the one under 

 consideration, but they differ constantly by the manner of the supply of 

 nerves to the secondary teeth. 



I have named this species in honor of Mr. Walter Harvey Weed, who 

 collected the best specimen observed. 



Habitat: Fossil Forest Ridge, middle stratum; collected by W. H. 

 Weed. Bed No. 6, "Platanus bed;" collected by Ward and Knowlton, 

 August 19, 1887. 



• Tert. PI., p. 159, PI. XX, fig. 11. 



"-F1. Foss. Arct., Vol. II, Mioc. Fl. Spitzb. (K. Vetensk. Akad. Handl., Vol. VIII, No. 7), PI. XII, fig. 5. 



3 Illustrations Cret. and Tert. Fl., PI. XXI. 



