Quercus. AMENTACEZ. 7 
These leaves are of the same section as those of the two former species. 
Their form is ovate, rounded at the base to a comparatively long petiole, 
obtusely pointed, the borders marked by short distant teeth, scarcely dis- 
cernible in some of the specimens, like that of Fig. 7 for example. The 
nervation is subcamptodrome, the lower secondary nerves curving to the 
borders and following them in festoons, the upper ones entering the teeth 
while their upper branches follow the borders, and pass to the intermediate 
teeth by veinlets. The secondary veins are distant, the lower ones at a 
more open angle of divergence, and curved, the upper ones nearly straight, 
generally forking once, or simple, or sparingly branching in the middle 
of the areas. 
To this species, also, the fossil leaves published by European authors 
offer scarcely any analogy. The peculiar nervation is comparable to that 
of the leaves of Quercus attenuata, Goepp., Tert. fl. v. Schossnitz, p. 17, PL. 
VII. Figs. 4, 5, which have a different type of denticulation of the bor- 
ders, and their base narrowed to the petiole. A more marked relation is 
found with the living species Q. crassifoha, Humb. and Bonpl., of Mexico, 
and Q. agrifola, Nee, of California. 
Habitat. — Chalk Bluffs, Nevada County, California. Voy’s Collection. 
Quercus Goepperti, sp. nov. 
PL dl Hig. 2. 
Leaf small, oblong, narrowed in equal degree upward to an obtuse point, and downward 
to a short petiole ; borders doubly serrate or denticulate ; secondary veins parallel, 
subcamptodrome. 
The species is known by a single oblong, lanceolate obtusely pointed 
leaf, four centimeters long, a little more than one centimeter broad, nar- 
rowed in curving to a short slender petiole; borders denticulate, the teeth 
entered by the points of the secondary veins, being a little larger or more 
prominent ; secondary veins parallel, either entering the teeth by the 
points, or curving quite near the borders, and passing to them by branch- 
lets, a nervation of the same type as that of Quercus Nevadensis. By the 
border divisions only, this leaf is related to @Q. attenuata, Goepp. loc. cit., Fig. 
5; but it greatly differs from it by its more numerous secondary veins, its 
oblong linear shape, etc. 
Habitat.— Same as the former. Voy’s Collection. 
