52 TUE FLOKA OF TEE DAKOTA GKOUP. 



the genus. But the same appearances are observable in the leaves of Fagus 

 deucalionis Vng., the distance of the nervilles and size of the leaves being 

 nearly the same as represented in Heer"'; also in F. Antij^ofii Ahich, the 

 leaves of which are figured with the borders perfectly entire,^ as well as in 

 F. cordifolia Heer,^ which was apjiarently originally subcoriaceous, seems to 

 have been heavily compressed, and therefore looks thin, especially along 

 the borders. 



Habitat: Ellsworth County, Kansas. No. 224 of the collection of 

 Mr. E,. D. Lacoe, of Pittston, Pennsylvania. 



QUERCUS SUSPECTA, sp. UOV. 



PL XL VII, Fig. 7 ; PI. XLVIII, Figs. 1, 2. 



Leaves large, coriaceous, broadly oval or nearly round, nairowed 

 toward the base, undulate or obtusely dentate on the borders, obtuse or 

 emarginate atapex; median nerve stout; secondaries strong, oblique, equi- 

 distant, simple or branching in the upper part, effaced before reaching the 

 borders, craspedodrome. 



The leaves are large, 7"™ to 13""" in length, 6"" to O"'" in width, nar- 

 rowing toward the petiole, with six to eight pairs of alternate secondaries, 

 the lowest supra-basilar, all parallel, passing toward the borders at an angle 

 of divergence of 40° to 50°, becoming thick from the. middle downward, 

 gi-adually thinning toward the borders, some of them brandling. 



The smaller one (Fig. 7, PI. XLVIl) is more distinctly, obtusely, and 

 equally dentate; the secondaries, simple on one side, branch on the other, 

 and are of the same character as those of Fig. 1, PI. XLVIII, which is large, 

 nearly entii'e or with undulate borders. 



These leaves may be compared in size, foi*m, and nervation to Q. Wilmsii 

 and Q. latisfiima Hos.,* two species of doubtful relation, and also to Q. Dcloesi 

 Heer.^ But the points of utiinity do not sufficiently sustain the reference of 

 these leaves to Quercus. 



Habitat: Ellsworth County, Kansas. Nos. 217 and 226 of Mr. R.-D. 

 Lacoe's collection. Fig. 2 of PI. LX, from near Fort Harker, Kansas, is 

 No. 2757 of the U. S. National Museum catalogue. 



' Fl. Fo88. Arct., vol. 4, pt. 1, p. 73, PI. xv, Fig. 6. 



^ Fl. Foss. Arct. vol. 5, pt. 3, PI. vi, Fig. 8 ; PI. vil, Fig. 5. 



^Loc. cit., vol. 7, PI. xcu, Fig. 1. 



^Dicotyl. derWestfjll. Kreideformatioii, p. 9.5, PI. xil, Figs. 3-6, and p. 97, PI. xill, Fig. 11. 



"Fl. Tert. Helv., vol. 2, p. 56, PI. Lxxviii, Fig. 7. 



