156 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



Quo re (IS Pralei, Lesqx. 



Plate XX, Fig. 6. 



Quercus Pealei, Lesqs., Anuual Report, 1871, p. 297; 1872, p. 406. 



Leaf coriaceous, small, cuneate, and entire from the middle to the base (petiole broken), more 

 abruptly narrowed to an obtuse point, and undulato-dentate in the upper part ; lower pair of secondary 

 veins from the base of the leaf, opposite, at a more acute angle of divergence, and camptodrome ; upper 

 pair alternate, distant, sparingly branching, craspedodrome. 



This small leaf, four centimeters long and two centimeters broad in the 

 middle, may be referable to the former species. The character of the 

 nervation appears at first very different; but, comparing fig. 4 to fig. 6 of 

 the same plate, the analogy in the position and direction of the secondary 

 veins becomes more evident, for in fig. 6, as indicated by the festoons of 

 the tertiary veins or branches along the borders above the broken part, 

 the leaf has, like that of fig. 4, a marginal vein, whose place is taken on 

 the other side by a camptodrome secondary vein. The more marked differ- 

 ence which induced me to separate this species is the more evidently 

 coriaceous substance of this leaf and the discernible nervilles. It appears 

 intimately related to Quercus fagifoUa and Q. triangularis, Goepp, (Schoss. 

 Tert. Fl.,pp. 14 and 15, pi. vi, figs. 9-17), — two species described by Schimper 

 as Farrotia fagifolia. 



Habitat. — Six miles above Spring Canon, Montana {Dr. A. C. Peale). 



Near Fort Ellis, Montana (Jos. Savage). 



Quercus Haidin$feri, Ett 



Plate XX, Figs. 9, 10. 



Quercus Eaidingeri, Ett., Fobs. F1. v. Vien., p. 12, pi. ii, fig. 1.— Heer, FI. Tert. Helv., ii, p. 53, pi. Ixsvi, figs. 

 5, 7, 8, 10, 14. — Gaud., Contr., ii, p. 42, pi. iii, fig. 6. — Lesqx., Annual Report, 1874, p, 313, 



Leaves subcoriaceous, broadly lanceolate, acuminate, narrowed to the base; borders creuulato- 

 serrate; lateral nerves uuequidistant, sparingly branching, effaced toward the borders, camptodrome. 



The American leaves representing this species are slightly larger than 

 those of the European Tertiary, especially that of our fig. 10. They agree, 

 however, so well by all their characters with those described under this name, 

 that I consider the identity as undeniable. The size is from ten to fourteen 

 centimeters long, and three and a half to five centimeters broad below the 

 middle. The largest leaf in Heer (loc. cit., fig. 4) is as long as that of our fig. 

 9, and slightly narrower. Tlie narrowly ovate-oblong shape of the leaves, 

 tapering upward to an acumen and slightly more rapidly narrowed in curving 

 to the base, the crenulate or dentate borders, are the same, and the inequi- 

 distant secondary nerves, some of them simple, some sparingly branching, 



