g FOSSIL FLORA OF THE SIERRA NEVADA. 



Quercus Voyana, sp. nov. 



PL II. Fig. 12. 



Leaf small, subcoriaceoxts, nearly round in outline, crenulate from the middle to the 

 base, undulate and truncate at the top; midrib thick; secondary nerves curved, 

 subcamptodrome, deeply marked, as also the percurrent nervilles in right angle to the 

 veins. 



This small leaf, nearly round or enlarged truncate at the top, and rounded 

 to the petiole, has the same character of nervation as the former species ; 

 the lower veins distinctly camptod route, the upper ones entering the borders, 

 either directly or by branching veinlets. The lower part is by its form 

 similar to the leaves described above as Quercus distincta, and indeed, but 

 for its truncate top, it would be considered as a variety of the same species. 

 Its size is only about three centimeters across, and both ways. Its rela- 

 tion is to Q. agrifolia, Nee. 



Habitat. — Chalk Bluffs, Nevada County, California. Voy's Collection. 



§ III. — Leaves deeply Lunate. 



Quercus pseudo-lyrata, sp. nov. 



PI. II. Figs. 1, 2. 



Leaves of large sir*; oblong obovatt in outline, cuneate to the petiole, divided into deep 

 linear obtusely pointed or acuminate lobes, either simjrte or marked toward the point 

 by om or two largi. teeth; secondary veins few and distant, passing up in an acute 

 angle of divergence to tht points of the lobes. 



The consistence of these two fine leaves is not very thick, only sub- 

 coriaceous ; they are narrowed at the base, and wedge-form to the petiole, 

 four lobate on each side, the two lower pairs of lobes short, entire, obtuse, 

 the third longer, with the lobes either entire obtusely pointed, or cut near 

 the point in two or three acute or acuminate teeth ; the lobes have the 

 same declination as the secondary veins, which diverge from the midrib 

 on an angle of 40-50°. The secondary veins pass up to the point of the 

 lobes, and are more generally simple, sometimes branching, the divisions 

 either curving along the borders, or the upper ones entering the teeth 

 of the lobes. The intermediate tertiary veins are short, and generally on 

 a more open angle of divergence. 



These fine leaves represent the section of our American lyrate Oaks in 



