36 FOSSIL FLORA OF THE SIERRA NEVADA. 



leaflets. No species of Juglans, either fossil or living, is distinctly related 

 to this leaf. It has in its shape some likeness to J. Bilinica, Ung., whose 

 leaves are very variable in form and size, and sometimes as sharply ser- 

 rate as this one; but the characters of nervation are quite different. 

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



Juglans egregia, sp. nov. 



PI IX. Fig. 12 ; PI. X. Fig. 1. 



Leaflets large, firm, but not quite coriaceous, oblong-lanceolate, rapidly narrowed to an 

 obtuse point ; more gradually attenuated to the petiole ; borders sharply, minutely, 

 distantly serrate ; nervation camptodrome. 



Though the leaflets represented upon our plates are different, especially 

 in their size, they seem referable to the same species, all the characters, 

 except the rounded base of the leaves of Fig. 1, PI. X., being alike. Dif- 

 ferences of the same kind are generally remarked upon species of Juglans 

 of the present flora. The leaflets, eighteen to twenty centimeters long, 

 four to eight centimeters broad, are either oblanceolate, gradually nar- 

 rowed to the petiole, and obtusely pointed, or oblong, rounded to the 

 base, and rapidly attenuated or cuneiform to the point; the borders are 

 more or less distantly serrate from near the base, and the lateral nerves, 

 slightly more open toward the base, are generally equidistant, and on 

 the same angle of divergence, averaging 50°. They are, when distant, 

 separated by intermediate tertiary veins traversing to the middle of the 

 areas, where, joined by nervilles in right angle, they enter into the areo- 

 lation mostly composed of subdivisions of the nervilles, forming irregularly 

 square or equilateral large meshes. The veins following the borders in 

 simple bows are joined to the teeth by veinlets only, and do not enter 

 the borders by their ends. This character refers these fine leaves to 

 Juglans rather than to Carta, to which they have some likeness of shape. 

 No fossil species is comparable to this one, except, in a very distant 

 way, J. Bilinica, Ung, whose leaflets, as remarked above, are very variable 

 in shape. 



Habitat. — Chalk Bluffs, California, with numerous fragments of Aralia 

 WMtneyi. Professor J. D. Whitney. 



