10 FOSSIL FLORA OF THE SIEREA NEVADA. 



which it differs by the acuminate point. Nothing more of the nervation 

 can be observed upon the specimen than what is seen on the figure. 

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



SAL1X, L. 



Salix Californica, sp. nov. 



PI I. Figs. 18-21. 



Leaves sxibcoriaceous. > ntire oval-obtuse, or oblong, obtusely pointed, or lanceolate, tapering 

 to a long acumen, rounded in narrowing to the base, short petioled ; secondary nerves 

 in an acute angle of divergence ; areolation, obsolete. 



The four leaves figured of this species show a great diversity of shape. 

 They vary in size from four to six centimeters long, and from one and 

 a half to two centimeters broad, the broadest part being generally a 

 little below the middle, and hence, either gradually decreasing into a 

 long acumen, as in Fig. 19, or to a short slightly obtuse point, as in Fig. 

 21, or rounded and more obtuse at the top; the consistence is subcoria- 

 ceous, and the surface smooth ; the midrib is narrow, and the secondary 

 veins are only discernible, with some parallel nervilles in right angle, as 

 in Fig. 18. They have generally one pair of basilar veinlets, derived 

 from the midrib near the base of the lamina, and following the borders 

 to their connection with an upper vein by nervilles. 



This species is intimately related to S. Integra, Goepp., Schoss. Fl., p. 25, 

 PI. IX. Figs. 1-16, differing by more distant lateral veins, more obtuse 

 or obtusely pointed leaves, generally broader, and of larger size. Goeppert 

 compares his species to Salix repens, L., which has in the shape of some 

 of its leaves some relation to this species also, but is very distinct by 

 the salient nervation. Ours is rather comparable to the leaves of S. 

 Coulteri, Anders., or to S. sessilifolia, Nutt., both species of the Western 

 slope of North America. 



Habitat. — Table Mountain, Tuolumne County, California. Voy's Collec- 

 tion. 



Salix elliptica, sp. nov. 

 PL I. Fig. 22. 



Leaves elliptical, equally narrowed, and rounded to an obtuse point ami to the petiole, 

 borders minutely unequally serratt : lateral veins curving to and along the borders ; 

 tertiary veins short and thin, nervilles numerous and distinct. 



