56 TUE FLOEA OF THE DAKOTA GROUP. 



Qx^EECUS pouANOiDES Lesq. 

 Oret. Fl., i>. Cfi, PI. xxx, Fi?. !>. 



QUERGUS (I)RYOPHYLLtJM) PRIMORDIALIS LeSq. 



Oret. Fl., i>. 04, PI. v, Fig. 7. 



Que ROUS (Dryophylltjm) dakotensis Lesq. 

 PI. VII, Fig. 4. 



Cret. and Tert FL, p. 39. 



Leaves subcoriaceous, ovate-lanceolate, narrowed in an outside curve 

 to the base, less abruptly attenuated to an acute or blunt apex (not distinct), 

 entire toward the base, regularly dentate from the middle upward, short 

 pedicellate ; median nerve narrow, straight ; secondaries thin, nearly 

 straight, simple or divided into two or three branches, craspedodi-ome. It 

 is closely allied to the preceding species. 



Habitat: Kansas. No. 62 of the Museum of Comparative Zoology 

 of Cambridge, Massachusetts. 



QuERcus HEXAGONA Lesq. 

 PI. VII, Fig. 5. 



Cret. Fl., p. 64. PI. V, Fig. 8. 



Leaf rhomboidal-ovate, naiTOwed to a point from above the middle, 

 tapering do^^^lward, cuneate at base, irregularly dentate above, nervation 

 pinnate, simple, craspedodi'orae. 



The leaf figured here is somewhat smaller than that described in the 

 Cretaceous Flora. It has, however, the same characters. The basilar second- 

 aries follow quite near the borders and parallel to them, entering into very 

 short, slightly marked teeth, while the upper ones are alternate and pass to 

 stronger acute teeth, that of the third pair Ijeing the largest of all in both 

 specimens. To the first descnption of the .species nothing has to be added 

 but this, that the secondaries are not always simple, but sometimes once 

 branching. 



The relation of this species to Q. Osbornii, remarked in Cret. and Tert. 

 Fl., p. 39, is not well defined. It is more distinctly marked with Q. troglo- 

 (lifcs Heer'" of the Middle Cretaceous or Senonian of Atanekerdlnk, a species 

 which appears nearly identical, diftering merely by shorter, more obtuse 



'Fl. Foss. Arct., vol. 6, 2 Abth , PI. xxix, Fig. 14. 



