PUCCINIA ON THE JAPANESE UMBELLIFERAi. 12 1 
the Corean specimens correspond exactly with the character of the Japa- 
nese form on Phellopterus. 
Dietel ( 2 ) regarded a form on Cnidium japonicum collected by 
KUSANO as P. Apii. By the kindness of Mr. KUSANO I have been able 
to study both the uredospore and teleutospore stages of that fungus. 
Compared with Puccinia A pii, the uredospore is entirely different, the 
wall being very much thicker, although there is no apparent difference 
between them in the character of teleutospores. 
The form on Phellopterus and that on Cnidium are here treated as 
belonging to the same species. The further study may prove them as 
two distinct species. 
In a letter of Mr. KUSANO, it is communicated that the following 
differences are noticeable between these forms. 
The uredospores on Phellopterus have thicker membrane and also 
a distinct boundary line between the epispore and inner membrane. 
Germ-pores of the uredospores on Cnidium are 4 (or 3), while those on 
Phellopterus are usually 3, and never 4. 
My own observations, however, rather point to the contrary conclu- 
sion. Distinctive characters enumerated by Mr. IvUSANO are not constant 
and fixed. 
