No. 459.] ANATOMY OF CATALPA HYBRIDS. 117 
Of its value as an ornamental tree there can be no doubt. Its 
larger size and more rapid growth, its better habit and more 
showy inflorescence, make it a far more valuable ornamental tree 
than the Japanese species; it is more hardy than either of the 
North American species, and although the flowers are smaller, 
the panicles and the number of the individual flowers are much 
larger.” The inflorescence of the hybrid is also remarkable for 

Fic. 3.— Catalpa speciosa. Transverse section, X 44 
all an 
e, tangential and concentric bands 
spring wood; d, the narrow zone of the summer wood; 
iting zone of wood tracheids. 
of fiiius pd parenchyma ; /, the narrow, lim 
its prolonged duration which extends from June until September 
as presented by specimens grown here. 
We may now turn to a study of the internal structure of the 
hybrid and of the three related species in order to determine (1) 
if the crossing has made an impress upon the anatomical struc- 
ture, or if it is simply expressed in external characteristics; (2) 
