4 FOSSIL FLORA OF THE SIERRA NEVADA. 
pean F’ sylvatica, Linn., to which it is related in an equal degree, differing 
by its more acute base, and by more numerous less straight secondary 
veins. 
Habitat. — Chalk Bluffs, California. Voy’s Collection. 
QUERCUS, Linn. 
§ I.— Leaves Entire. 
Quercus elsenoides, sp. nov. 
Pi. I. Figs. 9-12. 
Leaves coriaceous, oval or oblong, lanceolate, nearly equally narrowed upward to a 
point, or a short obtuse acumen, and downward to a short petiole; lateral veins 
at an open angle of divergence ; parallel camptodrome. 
These leaves vary in size from five to ten centimeters long, and from 
two to three centimeters broad ; either oval-pointed or oblong, lanceolate 
acuminate, gradually narrowed to the petiole. The midrib is narrow; 
the lateral veins open, diverging about 50°, curving, camptodrome, and 
generally branching near the borders. The areas are more generally 
simple, as in Fig. 11, but sometimes divided in the middle by tertiary 
veins, anastomosing with nervilles at a distance from the middle nerve, 
and passing by divisions into the areolation; nervilles distinct in right 
angle to the secondary veins, forming, by multiplied branches in opposite 
directions, small quadrate meshes, as seen in Figs. 11 and 12. The species 
is closely related to Quercus elena, Ung., especially to the figures in 
Heer (Flor. Tert. Helv. III, Pl. CLI. Fig. 3,) and in Saporta (Etud., 
Ill., Pl. V. Fig. 2). Like the following species, it is of the type’ of 
Quercus virens, Ait., and Q. cinerea, Muhx., of the Southern United States 
flora. 
Habitat. — Table Mountain. Voy’s Collection. 
Quercus convexa, sp. nov. 
Pl. I. Figs. 13-17. 
Leaves of a thick coriaceous consistence, small, oblong, obtuse, rounded, and narrowed 
to a short petiole; borders reflexed, very entire; surface convex ; nervation camp- 
todrome. 
The collection has a large number of finely preserved specimens of this 
species, easily identified by their small oblong, obtuse, always convex leaves. 
