86 



Mycologia 



Illustration : One woodcut text figure showing conidiophore and 

 conidia. 



Sufficient material was not secured to make inoculation experi- 

 ments. The species is characterized by the very short terminal 

 branch of the conidiophore, the long main stem, ovoid conidia, and 

 uniform growth of germ tubes. 



Helicobasididum mompa N. Tanaka forma macrosporum K. 

 Hara form. nov. in Dainippon Sanshi Kwaiho (Journ. Seric. 

 Assoc. Japan) Tokyo. 26^^^: 725. T. 6. ix. Sept., 1917. 

 (Japanese.) 



Sporidia oblong-ovoid, straight or curved, rounded at the apex, 

 gradually pointing toward the base, 15-25 X^6-S fx, average 

 18 X 7/^- 



On Morus. 



Locality: Not given. 



This form is to be distinguished from the typical " Mompa " 

 fungus, which has much smaller sporidia, measuring 10-15 X 5- 

 7^. (N. Tanaka, in Journ. Coll. Sci., Tokyo. 4^: 194. 1891.) 



On account of the absence of protobasidia, the species belongs 

 to H elicohasidium instead of to Septohasidium, to which it was 

 transferred by Racibo.rski in 1909 (Bull. Int. Ac. Sci. Cracovie; 

 Math.-Nat., Ann. 1909: 365). 



Bureau of Plant Industry, 

 Washington, D. C. 



