Cercocarpus. ROSIFLOIL-E. 37 



ROSIFLORjE. 



CERCOCARPUS., II. B. K. 



Cercocarpus antiquus, sp. nov. 



PI X. Figs. 6-11. 



Leaves obovate, cuneiform to the base and to the point, dentate from the middle upwards ; 

 lateral veins close, parallel, craspedodrome. 



The leaves, of a thick consistence, varying in size from two to six cen- 

 timeters long, and comparatively broad, are gradually narrowed down- 

 ward from the middle, slightly decurrent at the base to a short petiole, 

 and somewhat more obtusely cuneate to the point. The lateral veins 

 thick, but indefinite, close, parallel, on an acute angle of divergence of 

 40°, enter each one of the obtuse teeth which border the leaves from the 

 middle upwards, the lower part being entire. The surface seems covered 

 with a villous coating; for in Figs. 6, 7, and 10 the space between the 

 veins is indistinctly and irregularly lineate, as if the nervation was 

 obscured by hairs. These leaves are evidently referable to this genus; 

 they are, however, of an average size, somewhat larger than that of the 

 species now inhabiting the Rocky Mountains, and intermediate between 

 them and C. Father •gilloides, II. B. and Kunth., of Mexico. No species of 

 this genus has been found in a fossil state until now. 



Habitat. — Table Mountain, Tuolumne County, California. Represented 

 by nu nerous specimens in Voy's Collection. 



