T. D. A. Cockerell — Descriptions of Tertiary Plants. 541 



Hydrangea florissantia Ckll. 



Rhus rotundifolia Kirchner, Trans. St. Louis Acad., viii, 

 p. 184, is the same thing. The name rotundifolia was much 

 earlier used in Hydrangea by Batinesque. Kirchner's type 



is, I believe, in the U. S. National Museum. 



Sambucus newtoni sp. nov. Fig. 6. 



Leaflet (doubtless a lateral one) about 132 mm long and 26 

 broad ; texture thin, this and the venation exactly as in living 



Fig. 



Fig. 5. 



Fig. 5. Rosa ruskiniana. 



Fig. 6. Sambucus newtoni. 



species of Sambucus; form parallel-sided, rapidly narrowing 

 apically to a sharp point, very much as in S. arborcscens Xuttall ; 

 margin with exceedingly minute denticulations, 1 to 5 in 5 ,nm , 

 and even these evanescent on the basal half. 



Florissant, Station 13 B {George Newton Rohwer, 1908). 

 The best side shows all but the base; the reverse lacks the 

 apex, but shows nearly all of the base, which is substantially as 

 in S. arborescens. This is the first American fossil Sambucus ; 

 in Europe the genus is represented by flowers in amber. 



Lomatia acutiloba Lx. is on the same slab as Sambucus 

 newtoni. 



