ox THE URKIJIXKAE PARASITIC OX TIIK JArANESE GRAMIXEAE. 241 



that the duration of the tclcutostage begins from September antl hists to the 

 end of April, while that of the uredostage ranges from April to September. 

 The author described accurately the characters of the uredospores. He 

 further remarked about the wariability in the shape of the tcleutosorus and 

 in the length of the pedicel of the teleutospore. The length of the pedicel 

 differs according to the position of the spores. When they are situated in 

 the middle part of the sorus. the length of the pedicel often reaches to i mm. 



In 189^, V. Hexxixgs (1) described the present fungus as a new species 

 under the name of Puccuiia Schottiniillcri from the specimen collected b}' 

 Otto Schott.MÜLLER in Nagasaki, in .1861, on Bambusa sp. In 1S94, G. 

 TviASSEE (i) observed that Pitccinia SclioltniilUcri o{ P. HexniXGS is nothing 

 but Piiccinia corticiuides of Bl'.KKEl.EV and BrOOME. In 1901, P. Hex- 

 NIXGS (3) retracted the name of Puccinia Scliottintilleri. 



Before that time, in 1899, P. INIaGXUS (i) proposed to found on it a new 

 genus Stereostratum. Me distinguished it from Puccinia b}' a h)-aline or 

 light colored epispore, b}- the number of germ-pores and b)' the peculiar 

 character of the sorus of the teleutospores. The author noted its relations 

 to Gymnosporangium, which it resembles in the hyaline wall and the shape 

 of sorus, but it differs in the non-gelatinous character of the pedicel. 



In 1875, ScilROETER established a new genus Uropyxis, laj-ing im- 

 portance on the presence of two or more germ-pores in each cell of the 

 teleutospore. Our species may be included in Uropyxis, considering from 

 the presence of two germ-pores and of thin hyaline membrane onlj-, but the 

 Stereum-like form of its sorus prevents us from doing so. 



In 1904, SVDOW 12) remarked that Stereostratum ought to be included 

 in the Uropyxis series of Puccinia. 



Based on my personal observations of many specimens (i) I am inclined 

 to accept the \-iew of P. MAGNUS in considering our species as a type of a 

 new genus Stereostratum. (2) The host-plant is not limited to Arnudinaria 

 Suiwiii as has hitherto been considered, but PJiyllostachys baiithnscndcs, 

 P. pxhcvula and Sasa albo-viari^inata are also to be counted as its liost- 

 plants. 



