Csi 



(Reprinted from Mycolocia. Vo'. X^^^. No. 2. Marcli 1922 1 



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 tiAKUhiN 



NEW JAPANESE FUNGI 

 NOTES AND TRANSLATIONS— XI 



Tyozaburo Tanaka 



Helminthosi'okium Oryzae Miyabe & Ilori sp. nov. ex S. Ilori 

 in Noji Shikcnjo Hokoku (Bulletin of the Agric. Exper. Sta- 

 tion), Nishigahara, Tokyo, no. 18: 67-84. M. 34, xi, Nov., 

 1901. (Japanese) ; Saccardo, Sylloge fungorum 22: 1394. 1913 

 (nom. nud.) ; Oudcmans, Enum. syst. fung. i : J2T). 1919 

 (nom. nud.). 



Spots scattered or grouped, fuliginous or soot-color, velvety ; 

 conidiophores fascicled, 2-5 in group meeting rather loosely at the 

 base, (lark-brown, more or less bending, 7-15-septate, lowermost 

 cell largest, rather rounded and swollen, width of cells gradually 

 reduced toward the apex, terminated by blunt, thin-walled, light- 

 colored or almost colorless cell, 100-330 x 6-8 /u,; conidia lunate 

 or obclavate bending to one side, obtuse at both ends, easily de- 

 tached, pale-olivaceous of sooty shade, 6-ii-septate. only slightly 

 constricted at the septum, contents finely granular, 84-140 x 16- 

 22 fi, germinating at both ends. 



Parasitic on culms, leaves, and glumes of Orysa sativa. 



Type localities : Experimental farm of the Imperial Agricul- 

 tural Experiment Station, Nishigahara, Tokyo, Sept., 1900 (S. 

 Hori) ; Tokyo-fu Minamitama-gun Motohachioji-mura, Sept. 26. 

 1900 (S. Hori); Okayama-ken, Sept., 1900 (T. Nishida). 



Japanese name of the disease: Ine Goma-hagarebyo (Sesame- 

 spot leaf blight of rice plant) ex Hori in Dainippon Nokwaiho 

 (Journ. Agric. Soc, Japan), no. 380: 6. Feb., 1913. (Japanese.) 



Hori later revised the description as follows : Conidiophores 2-3- 

 fascicled, brownish, 100-330 x 7.2 ^u,; conidia 6-io-septate, fuscous. 

 See Hori's Nosakumotsu Byogaku (Discourse on diseases of agri- 

 cultural crops), Tokyo, Seibido, June, 1911, pp. 106-107. (Japa- 

 nese.) 



Illustration : Hori's original drawings of conidia and conidio- 

 phores are seen in the book above mentioned (p. 107). Ideta's 



81 



