NEW JAPANESE FUNGI 



NOTES AND TRANSLATIONS— II 



Tyozaburo Tanaka 



Phytophthora Allii K. Sawada sp. nov. in Noji Shikenjo 

 Tokubetsu Hokoku (Special Report Agric. Exper. Station), 

 Taiwan (Formosa), No. n, p. 59-60, pi. 1-2. T. 4, iii, Mar. 

 I9I5- 



Forming a cottony white mycelial mass on diseased portions of 

 leaves of Allium fistulosum. Hyphae filiform, hyaline, thin- 

 walled, with granular contents, continuous when young but always 

 septate when old, much branched, 3-8 /x across, penetrating the 

 cell walls of the host tissues. Haustoria not observed. Coni- 

 diophores appear through stomata of the host or sometimes break 

 through the epidermal tissue, mostly accompanied by hyphae ; 

 conidiophores filiform, fine, single or branching pseudo-dichoto- 

 mously or rather irregularly ramose, 140-480X4-6/*; conidia 

 terminal, globular, ovoid, obovoid or lemon-shaped, hyaline, 

 apically mamillate with a hemispherical papillum 5-10 /* high, 

 40-74X30^50/*, averaging] 49.4X36.5/*,, with or without a 

 thickened septum at the base ; falling off not rarely with a portion 

 of persistent conidiophore at the end, producing 15-60 zoospores 

 or germinating with germ tube. 



Oogonia formations were observed in cultures on media made 

 of bean agar-agar, and lima bean agar-agar. Oogonia spherical, 

 thin- walled, diam. 17-26 /t (average 20.7 jx), containing one 

 oospore ; oospores spherical, colorless or pale-honey-yellow, diam. 

 14-23/* (averaging 16.9/*), walls 0.5-1.5 /* thick. Antheridia 

 surrounding tightly the stalk of oogonia then becoming attached 

 close to the wall of oogonia at the lower portion not far from the 

 juncture of the stalk, usually round to obovoid, 8-18 X 10-14 /t. 



Parasitic on the leaves and flower stalks of Allium fistulosum. 



Type locality: Taihoku-cho Chonaiho-sho, Taiwan (Formosa), 

 collected by K. Sawada, Feb. 17, 1913 and July 3, 1913. 



Illustrations : 45 black and white lithographic figures showing 

 detailed structure of the fungus. 



An attempt to inoculate the ordinary onion {Allium Cepa) with 

 this fungus was not successful, so it seems that the infection is 



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