Feb.,i9io.j s. rro.-ox typhulochaeta, a new genus. 21 



Appendages branched in a definite manner 8. 



6. Appendages not uncinate at the apex 7. 



Appendages uncinate at the apex ; conidia single, 



not containing fibrosin-body Uncinula. 



7. Appendages more or less similar to the mycelium ; 



conidia in chain, not containing fibrosin-body 



Erysiphe. 



Appendages clavate in shape ; conidia not yet 

 observed Typhulochaeta. 



8. Appendages 2-3 forked, uncinate at the apex; conidia 



in chain, with fibrosin-body Sawadaea. 



Appendages dichotomously branched ; conidia single, 

 not containing fibrosin-body Microsphaera. 



9. Appendages equatorial, acicular, with a bulbous 



base ; conidia single, not containing fibrosin-body 



Phyllactinia. 



10. Appendages similar to Erysiphe; conidia single, not 

 containing fibrosin-body Oidiopsis. 



Finally, I wish to express here my heartiest thanks to Prof. 

 Dr. K. Miyabe to whom I am indebted for his suggestions and 

 to Mr. K. Hara who has kindly sent me this interesting 

 fungus. 



Literature cited. 



1. Leveille, J. H. Organisation et disposition nie"thodique des especes qui com- 



posent le genre Erysiphe. (Ann. sci. nat., Ill, 15, 1851). 



2. Link, H. F. Willdenow, Species Plantarum, 6, 1824. 



3. Miyake, I. Ueber einige Pilz-Krankheiten unserer Nutzpflanzen. (Bot. Mag., 



Tokyo, 21 , 1907). 



4. Neger, F. W. Beitrage zur Biologie der Erysipheen. (Flora, 88, 1901.) 



5. Palea, E. Ueber die Gattung Phyllactinia. (Ber. Deut. Bot. Gesell., I 7, 1899). 



6. Salmon, E. S. On Certain Structures in Phyllactinia LeV. (Journ. Bot. 37, 1899). 



7. A Monograph of the Erysiphaceae. (Mem. Torrey Bot. Club, 9, 1900). 



8. The Erysiphaceae of Japan. (Bull. Torrey Bot. Club, 27, 1900). 



9. Supplementary Notes on the Erysiphaceae. (Bull. Torrey Bot. Club, 29, 



1902). 



