ON THE UREDINEAE PARASITIC ON THE JAPANESE GRAMINEAE. 24 1 
that the duration of the teleutostage begins from September and lasts 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 variability in the shape of the teleutosorus 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 1 mm. 
In 1893, P. HENNINGS (i) described the present fungus as a new species 
under the name of Puccinia Schottmiilleri from the specimen collected by 
Otto Schottmüller in Nagasaki, in 1861, on Bambusa sp. In 1894, G. 
MASSEE (i) observed that Puccinia Schottmiilleri of P. HENNINGS is nothing 
but Puccinia corticioides of BERKELEY and BROOME. In 1901, P. HEN- 
NINGS (3) retracted the name of Puccinia Schottmiilleri. 
Before that time, in 1899, P. Magnus (i) proposed to found on it a new 
genus Stereostratum. He distinguished it from Puccinia by a hyaline or 
light colored epispore, by the number of germ-pores and by 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, SCHROETER established a new genus Uropyxis, laying 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 only, but the 
Stereum-like form of its sorus prevents us from doing so. 
In 1904, SYDOW (2) remarked that Stereostratum ought to be included 
in the Uropyxis series of Puccinia. 
Based on my personal observations of many specimens (1) I am inclined 
to accept the view of P. MAGNUS in considering our species as a type of a 
new genus Stereostratum. (2) The host-plant is not limited to Arundinaria 
Sivioni as has hitherto been considered, but Phyllostachys bambusoides, 
P. puberula and Sasa albo-marginata are also to be counted as its host- 
plants. 
