88 



Mycologia 



cola they are straight, and the details of pycnidial structure differ 

 greatly in the two species. 



Septobasidium acaciae Sawada sp. nov., in Noji Shikenjo Toku- 

 betsu Hokoku (Special Report, Agr. Exp. Station) Taiwan 

 (Formosa), no. 2: 103-104, pis. 11, 12. M. 44, xi, Nov. 1911. 

 (Japanese.) 



Mycelial strands (pilea) filamentous, rigid, tightly adhering to 

 the bark, effused, 10 cm. across, 70-180 thick; surface smooth, 

 brown or tobacco-brown when dry, brunneous when wet ; margin 

 grayish-white; hyphae yellowish-brown when mature, branched, 

 septate, 3 \h in diam. ; protobasidia appearing on superficial hyphae, 

 spherical, colorless, finely guttulate, subsessile, 9-15^ across; 

 basidia rising from protobasidia, easily detached, cylindric, sub- 

 acute above and truncate below, straight or slightly curved, 

 hyaline, 1-5-septate, 52-81 X4~6/a; sterigmata from each cell of 

 basidia, 4-12 /x long; basidiospore hyaline, oblong to oblong- 

 obovoid, curved, 18-22 X 3-6 fi, germinating with short tubes 

 carrying sporidia of about the same appearance as basidiospores 

 measuring 11-15 X 3~5^ 



On trunks and twigs of Acacia Richii. 



Type locality : Taihokucho Shakuko, Formosa, Sept. 26, 1910, 

 K. Sawada and Y. Fujikuro; 1. c. Oct. 7, 1910, Y. Fujikuro. 



Additional hosts and localities: On Glochidion obovatum (Eu- 

 phorbiaceae), Agr. Exp. Station ground, Taihoku-cho Taikazeiho, 

 Formosa, Oct. 7, 1910, Y. Fujikuro; on Citrus sp. Taihoku-cho 

 Kiirun, Mar. 28, 191 1, K. Sawada. 



Illustrations: One halftone plate showing diseased twigs of 

 Acacia and Glochidion; one black and white lithographic plate 

 with 16 figures showing detailed structure of the fungus. 



Note: It has been further reported by K. Sawada (in Noji 

 Shikenjo Tokubetsu Hokoku, Taiwan, No. 11, Feb. 1915) that 

 this fungus also occurs in Formosa on Prunus Per ska (peach), 

 Primus salicina (plum), Thea sinensis (tea plant), Salix glandu- 

 losa var. Warburgii, and Melia Azedarach. 



The affection is closely related to the attack of scale insects, 

 and in many cases the dead insects were found embedded in 

 the mycelial strands. The fungus sometimes kills Acacia trees 



