30 Mycologia 



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

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

 sanguinale. 



In a later article (Noji Shikenjo Tokubetsu Hokoku — Special 

 Bull., Agr. Exp. Stat. — Tafvvan, no. i6: 65-66. June 191 7). 

 Sawada revised the diagnosis in following points : 



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

 slightly swollen near the base, bearing i-io conidia on alternately 

 inflected apices, brownish-gray, decreasing in intensity toward 

 the apex ; conidia pyrif orm or elongated-pyrif orm, with collar 

 cell of 1.7-2 /A diam., 17-28 X 8.5-i2|a average 22.5 X 10.2 /x, ter- 

 minal cell 4-1 1 /J. average 7.4 /a, central cell 5-8.5 /a average y [j., 

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



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 end? 

 with a collar cell of 1.2-1.8/i. in diam., hyaline, 20-35 X 7-iO/t, 

 average 27X8.6 /a, apical cell 6-13 ;«., average 8.7 /a, central cell 

 y-i2fj., average 8.2 ft, basal cell 7-12 ^u, average 9 /a, basal cell not 

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

 ing acrogenous chlamydospores, chlamydospores cinereous, 9.5- 

 12 X 9-10 /A. 



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 

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



