66 



THE BOTASICAL MAGAZINE. 



[Vol. XXI. No. 243. 



tends to 3-6 mm. The center of the scurf becomes afterwards 

 pale reddish or violet and then leaves brownish dead spots. 



The subcuticular mycelium predominating on the underside 

 of the leaves converts all into ascogenous cells. 



The asci are long, cylindrical or slightly clavate, and round- 

 ed at both ends or slightly truncate at the upper end, measuring 

 40-50 fi in length and 10— 13 ,« in breadth. The stalk cells 

 rounded at the base are also long, measuring 10-15 fi in length 

 and are broad as the asci. Their wall is somewhat thinner 

 than that of the asci. 



The ascos pores are globose or elliptical, usually 8 in an 

 ascus, 5/i or 4— 5x7/i Sometimes the asci are filled up with 

 conidia of various sizes. 



On Acer purpurascens Fr. et Sav. (Jap. name Kaji-kaede). 

 At several places about Nikko in Prov. Shimozuke. 27. V. 

 1906. A large host tree near the Nikko-Hotel is furiously 

 attacked ; especially the leaves of the sheltered shoots are 

 sprinkled with a great number of diseased spots, a slight 

 distortion often resulting. No less furiously is also affected a 



host tree on the road 

 side near Umagaeshi. 

 In diseased spots any 

 anatomical change is 

 scarsely visible, but 

 owing to the surface 

 extension at these 

 places the leaves are 

 more or less arched 

 towards the surface 

 on which the asci are 

 produced. As to the 

 action of the fungus 

 upon the host the 

 present species shows 

 nothing peculiar as 

 distinguishing it from any other Taphrina on Acer. Taking 

 the dimension and form of the asci into consideration it stands 



