442 Salmon : The Erysiphaceae of Japan 



Uncinula accris. — Europe (throughout); Asia (Transcaucasia). 



U. australiana. — Australia (New South Wales). 



U. clandcstina. — Europe (not recorded farther east than 

 Austria-Hungary and Poland); Africa (Algeria). 



U. CI into nil. — North America (United States, widely spread in 

 the Eastern States, but not recorded further west than Minnesota). 



U. necator. — Europe (widely spread in the conidial state [Oidium 



o 



North America 



(United States (throughout) and Canada (Ontario), with perithecia). 



U. polycJiaeta. — Asia (China, (Yunnan)); North America 

 (United States (South Carolina, Alabama, Mississippi)) ; South 

 America (Argentine (Buenos Ayres)). 



U. salicis. — Europe (throughout) ; Asia (Transcaucasia, India, 

 Siberia (Minussinsk), China (Yunnan)) ; North America (United 



Quebec) 



arranged in the following six classes : 

 I. Cosmopolitan species : Erysip 



Tap 



galeop 



sidis f E. graminis, E. polygoni, Microsphacra aim, Phyllactinia 

 corylca, Podosphaera oxyacanthac, Spliaerotheca humuli and var. 

 fuligincciy Uncinula salicis. 



2. European and North American species, recorded in Asia 



Japan only : 



Podosph 



tricha, P. oxyacantJiae var. tridactyla, Uncinida necator. 



3- 



Mi 



bcrbcridis, Uncinula aceris ; (b) European and African : Uncimda 

 clandestina. 



4. American species : Uncinula Clintonii (United States (East- 

 ern States)) ; U. polychacta (found in China also) (United States 

 (Eastern States) and South America). 



5. Australian species : Uncimda australiana. 



6. Species known only from Japan : Uncinula fraxini, U. 

 Sengokui, U. salicis var. Miyabci (see also U. verniciferac, p. 440). 



The following is an alphabetical list of the Japanese species, 

 with their host-plants and localities. Appended to this is a host 

 index. 



