Vol. 44 ; No. 11 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
—— 
NOVEMBER, 1917 
Relationship of the genus Kuehneola* 
Bris oat panes 
The genus Kuehneola was established by Magnus} some twenty 
years ago to better emphasize the peculiar rust on Rubus having 
white and delicate-walled teliospores, a rust that had previously 
for a decade been called Phragmidium albidum. The colorless 
telia with their catenulate teliospores, so unlike rusts in general, 
were placed in the genus Oidium by Link in 1824, and in the 
genus Torula by Fries in 1832. 
For a brief interval after the fungus was recognized as a rust, 
and before it was assigned to Phragmidium, or its close ally 
Kuehneola, it passed under the name of Chrysomyxa albida. In 
giving this name Julius Kiihn,t with his usual thoroughness and 
insight, clearly set forth the characteristics of both urediniospores 
and teliospores, pointing out that in the shape and manner of 
formation of the delicate, cylindrical teliospores, as well as in the 
absence of paraphyses around the uredinial sorus, and in the 
general appearance of the urediniospores, there was indicated a 
closer relationship with Chrysomyxa (M elampsoropsis) than with 
Phragmidium. 
The original Kuehneola albida (Kiihn) Magn., now better 
* Presented in part before the American Phytopathological Society at the 
Columbus meeting, December 29, 1915. 
+ Bot. Centr. 74: 169. 1898. 
t Bot. Centr. 16: 154. 1883. 
[The Butietin for October (44: 463-500. pl. 23) was issued October 1, 1917] 
501 
