Cornus. DISCANTHE.E. 23 



CORNUS, Linn. 



Cornus ovalis, sp. nov. 



PL VI. Figs. 1, 2. 



Leaves small, entire, oval, obtuse, rounded to a short petiole, penninerve ; secondary 

 nerves closer toward the base, the upper ones distant, simple, acrodome. 



We have only the two fragments figured, representing leaves five to 

 six centimeters long, and three centimeters broad in the middle. They 

 are nearly exactly oval, the base joining the short petiole by an inward 

 curve. The three lower pairs of secondary veins are close to each other, 

 half a centimeter distant, while the fourth pair is more than double that 

 distance from the third. They are all simple or without branches, either 

 alternate or opposite on the same angle of divergence of 40°, joined 

 by thin nervilles in right angle, and following the borders in simple 

 curve's. 



The characters of nervation are the same as in the species of Cornus 

 of the North American flora. By considering them only, we could refer 

 these leaves to C. atternifoUa, L., common over the eastern slope of the 

 United States. Its leaves, generally acuminate, are sometimes rounded 

 at the summit, like that of Fig. 1, by the splitting of the lamina and the 

 incurving of the sides. There is, however, a difference in the base of the 

 leaves which in the living species is generally narrowed and slightly 

 tapering to the petiole. The rounded base is observable upon the leaves 

 of C. Mix, L, of Europe, and C. sessilis, Torr., of California, both of the 

 same section as the fossil ones. 



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

 lection. 



Cornus Kelloggii, *i>- nov. 



PL VI. Fig. ?>. 



Leaves large, entire, broadly oval or nearly round, contracted upwards into <i *h<>rt 

 acumen, narrowed by " curve tn tin base ; secondary veins few, opposite, campto- 

 dromi : nervilles strait,/, simple, distant, continuous. 



This fine leaf, about fourteen centimeters long (the lower part is broken), 

 ten and a half centimeters broad, has characters very similar to those 

 of Cormts Nutiattii, Aiulub . of California. In the living species the lateral 



