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a eb NDT Xe 
DESCRIPTION OF FOSSIL LEAVES FROM THE TUNNEL OF THE NORTH FORK 
COMPANY, NEAR FOREST CITY.* 
Quercus transgressus, sp. nov. 
Leaf coriaceous, short-petioled, oblong-ovate, tapering to a short acumen, rounded at base to a 
short petiole ; borders entire, recurved ; lateral nerves open, parallel, numerous, 12-14, 
interlinked by distinct transverse nervilles. 
This leaf, five centimeters long, represents a species closely allied to 
Quercus chrysolepis, D. C., of California. From the statements of authors, 
this oak is abundantly distributed from the plains to the mountains. Among 
my specimens there is, sent by Dr. Kellogg from the Sierra Nevada, a 
branch bearing coriaceous, entire leaves, with the same characters as the 
fossil one. Considering merely this specimen, I should be authorized to 
refer the fossil leaf to this species; but the normal form has leaves more 
or less dentate. If this characteristic should be, after further discoveries, 
recognized upon other fossil leaves of the same formation, the identity of 
the Pliocene oak with Q. chrysolepis should be clearly established. 
Quercus Steenstrupiana? Herr, Arct. Fl. I. p. 109. Pl. XL Fig.5; XLVI. Figs. 8, 9. 
Leaf small, four to five centimeters long (ihe upper part is broken), ovate-lanceolate, rounded 
in narrowing to the unequal base, obscurely dentate on the borders ; laterai nerves close, 
parallel, entering the teeth, which in this specimen are scarcely distinct, the borders being 
mostly destroyed. 
** The specimens here described were collected by Professor Pettee, in 1879, in a tunnel near the Bald 
Mountain tunnel on the North Fork of Oregon Creek (see Plate Q), about 4,500 feet above the sea-level, and 
twenty miles north of Chalk Bluffs. Localities in the hydraulic mining region where the leaves are sufficiently 
well-preserved for identification are not common; and, in view of the fact that as much light as possible is 
desired in regard to the nature and range of the Pliocene vegetation, it was considered best that these speci- 
mens should be referred to Mr. Lesquereux for examination, and the results published as an appendix to his 
previous communication on the subject of the fossil plants of the auriferous gravels. —J. D. W. 
