Tanaka : New Japanese Fungi 



89 



heisho, Aug. 6, 191 1 (Y. Fujikuro) ; Kagicho Toroku, Apr. 30, 

 1913 (K. Sawada). 



Resembles Cercospora minima Tracy & Earle (Bull. Torr. 

 Bot. CI. 23 5 : 206. May, 1896) on pear from America, but differs 

 in being hypophyllous and in having longer conidiophores and 

 shorter but thicker conidia of grayish color, while the American 

 species is characterized by being epiphyllous and having shorter 

 conidiophores and slender and hyaline conidia. 



The extent of injury due to this fungus is not known. 



Ustilago formosana *K. Sawada sp. nov. in Taiwan Hakubutsu 

 Gakkwai Kwaiho (Journ. Formosan Nat. Hist. Soc.) no. 34: 

 6-8. T. 7, v, May, 1918. (Japanese.) 



Infesting inflorescence and the upper part of the culm; sori 

 linear, fuliginous, 2.5-14 cm. long, at first enclosed by grayish- 

 white membrane, later escaping from enclosing sheath, ruptures 

 and emits black spore mass inside, leaving only fibrous tissue be- 

 hind ; spores globose or subangular-globose, light reddish-brown, 

 containing granules, 5-7 ^ generally 5.5-6 /jl in diam. ; epispore 

 apparently smooth, but finely echinulate under close observation; 

 promycelia very short and continuous, or somewhat longer and 

 uniseptate, producing sporidia at the end or at the joint between 

 two cells, 8-17 x 1-3 /jl; sporidia fusoid to oblong-fusoid, often 

 producing secondary sporidia thereupon, 3-6 x 1-2 fi ; germinating 

 tube sometimes formed on the promycelium. 



On Panicum proliferum. 



When the disease occurs in the field, whole culms arising from 

 common root are infested. 



Type localities : Formosa. Taihokucho Chonaihosho, May, 

 1906 (S. Suzuki), Apr. 22, 1907 (Y. Fujikuro), Aug. 10, 1908 

 (Y. Fujikuro), Nov. 27, 1908 (K. Sawada), Dec. 4, 1908 (K. 

 Sawada) ; Toencho Nanseisho, June 2, 191 7 (K. Sawada) ; Tai- 

 tocho Daimabukutsu, Apr. 29, 1909 (K. Sawada) ; Taitocho Toran, 

 May 21, 1911 (K. Sawada). 



Differs from Ustilago Panici-prolifcri P. Henn., which occurs 

 on Panicum proliferum acuminatum in America, in having dis- 

 tinctly smaller spores. 



Bureau of Plant Industry, 

 Washington, D. C. 



