30 



Mycologia 



blast fungus does no injury to Panicum pdludosum. Similar rela- 

 tion was also found true in case of the Dactylaria of Panicum 

 s (inguinale. 



In a later article (Noji Shikenjo Tokubetsu Hokoku — Special 

 Bull, Agr. Exp. Stat. — Taiwan, no. 16: 65-66. June 1917). 

 Sawada revised the diagnosis in following points : 



Young round spots measure 2-3 mm. in diam. ; conidiophores 

 slightly swollen near the base, bearing 1-10 conidia on alternately 

 inflected apices, brownish-gray, decreasing in intensity toward 

 the apex; conidia pyriform or elongated-pyriform, with collar 

 cell of 1 . 7 — 2 p. diam., 17-28 X 8.5-12 /x average 22.5 X 10.2 xi, ter- 

 minal cell 4-1 1 jjl average 7.4 /x, central cell 5—8.5 /x average 7/x, 

 basal cell 6-10 /x, average 8.1 /x; diameter of germ tube 3-3.5 /x. 



Two additional plates (black and white lithograph) illustrate 

 conidiophores, conidia and the germination of conidia, and one 

 woodcut figure (on p. 20) gives general appearance of an af- 

 fected leaf. 



Dactylaria Leersiae Sawada sp. nov. in Taiwan Hakubutsu 

 Gakkwai Kwaiho (Journ. of Formosan Nat. Hist. Soc), no. 

 27/28: 252-253. T. 5, xii, Dec. 1916. (Japanese.) 



Foliicolous ; spots usually orbicular, 2-3 mm. in diam : , or 

 nearly fusiform, 5X2 mm., straw-colored at center, brown on 

 margin ; conidiophores fasciculate or solitary, simple, 2-3-septate, 

 a little swollen near the base, alternately inflected at the apex, 

 brownish-gray at the lower part, gradually becoming lighter to- 

 ward the apex, 48—88 X 4~5 ^ ', conidia short-conic to elongate- 

 conic, 2-septate, not constricted, rounded at the base which ends 

 with a collar cell of 1,2-1.8/* in diam., hyaline, 20-35 X7-10/A, 

 average 27X8.6^, apical cell 6-13x1, average 8.7x1, central cell 

 7-12 /x, average 8.2 /x, basal cell 7-12 /x, average 9x1, basal cell not 

 sinuate toward the papilla ; germ tubes 3-4 /x diam., septate, bear- 

 ing acrogenous chlamydospores, chlamydospores cinereous, 9.5- 

 I2X9- 10 ^. 



On living leaves of Leersia hexandra. 



Type localities: Chonaihosho, Taihoku-cho, Taiwan, July 3, 

 1914, and Apr. 15, Dec. 4, 1915, and Aug. 18, 1916, Sawada; 

 Shirin, Taihoku-cho, Sept. 23, 1916, Sawada. 



Notes: Almost similar to rice blast fungus, only differing in 

 (1) smaller collar cells which are attached to non-attenuated 



