CONTRIBUTIONS FROM THE WISLEY LABORATORY. 45 



CONTRIBUTIONS FROM THE WISLEY LABORATORY. 



III. Azalea Gall (Exobasidium Japonicum Shieai). 

 By Fred. J. Chittenden, F.L.S. 



In the year 1896 M. Shirai* described a gall upon the Indian Azalea 

 (Rhododendron indicum, usually known in gardens as Azalea indica), and 

 stated that it was very common upon that plant in Tokyo in May. 



Fig. 12. — Fungus-Gall on Rhododendron indicum. (Natural size.) 



The gall was found to be due to the attack of a fungus, up to that 

 time undescribed, which Shirai described and named Exobasidium 

 japonicum. 



* "^Descriptions of some new Japanese Species of Exobasidium," in Bot. Mag.< 

 Tokyo,' 1896, p. 52. 



