Tanaka : New Japanese Fungi 



31 



base of conidia, (2) much larger chlamydospores, (3) less richly 

 formed aerial hyphae in culture, and (4) when observed in cul- 

 ture distinctly more slender conidia with narrow basal cells. 

 Hyphae of this species do not develop on bouillon-agar prepared 

 with the extract of Panicum paludosum, while the rice blast fun- 

 gus does very well on that medium. Inoculation failed on rice 

 plant, just as the rice blast fungus has not been successfully trans- 

 ferred to Leersia hexandra. 



Redescribing this species in Noji Shikenjo Tokubetsu Hokoku 

 (Spec. Bull., Agr. Exp. Stat.), Taiwan, no. 16: 65 (June 1917), 

 Sawada states that the spots are at first orbicular, 1-3 mm. in 

 diam., then becoming angular, finally resuming fusiform shape. 

 Illustration in black and white lithograph shows conidiophores, 

 conidia, and germination of conidia in detail. Leaf spots are 

 also shown in a text figure appearing on p. 21. 

 Dactylaria Costi Sawada sp. nov. in Noji Shikenjo Tokubetsu 



Hokoku (Special Bull., Agr. Exp. Stat.), Taiwan, no. 16: 24- 



25, 66-67. T. 6, vi. June 1917. (Japanese.) 



Spots usually occurring on leaves ; small, orbicular, never be- 

 coming fusiform, 1-1.5 mm. in diam.; conidiophores fasciculate 

 or solitary, simple, generally 2-3-septate, slightly swollen near 

 the base, brownish-gray, becoming lighter toward the apex; 

 conidia elongate-pyriform to clavate-fusoid, 2-septate, not con- 

 stricted, both ends obtuse, often rounded at the base, with small 

 collar cell of 1.5-1,7 A* m diam., hyaline, 20-30 X 7.5-10 ^ average 

 24X8.6/X, apical cell 8.5-12^, average 10.6 other cells prac- 

 tically in equal length, basal cell not attenuated toward the papilla c 



On living leaves of Costus speciosus. 



Type locality: Chuho, Kagi-cho, Taiwan, Oct. 15, 1913, T. 

 Kawakami. 



Illustrations : One text figure (on p. 24) showing leaf spots, 

 and one black and white lithographic plate giving detailed figures 

 of conidia. 



Note : In an elaborate article of Y. Nishikado in Ohara Nogyo 

 Kenkyusho Hokoku (Report of the Ohara Agricultural Insti- 

 tute) i 2 : 171-218, Dec. 1917, two more species of blast fungi 

 found on Setaria spp. and on Zingiber spp. are described which 

 are determined as spp. nov., Piricularia Setariae and P. Zingi- 



