184 



BOJWMCAL MAGAZINE. voi. xvi. 



8. The spore-Lalls are siUToutKled while tliey are young by an invest- 

 ment consisting of gelatinous sterile hyphre (Figs. VI, s b and X). 

 At maturity, these balls which then measure 45-105//. x 45-85 /7. in 

 size lose their investment and become easily separable. 



9, The spore-balls are formed in more or less concentric rings around 

 each vascular bundle, and the ri[)ening proceeds centripetally toward 

 the bundle (Fig. XII). 



10. As can be gathered up from the above account, the present species 

 is evidently referable to the genus Sorosporium, and should bear the 

 name Sorosporium Panici miliacei (Pers.). 



11. Eesemblauce of the fungus in question to Sorosporium Syntherismaj 

 (Schwn.) Farlow was pointed out by Pammel^'^ in 1892, when the 

 latter species was still being retained in the genus llstilago. 



12. The hyphal stratum inside the epidermis of the srautpustule is well 

 developed in Sorosporium Synthcrismaj and also in S. Everhortii Ell. 

 et Gall., as far as my observation is concerned. This is also the 

 case with 8. Ehrenbergii Kiihn according to Dietel/^^ In the above- 

 named two species of Sorosporium, however, the hyphal strands are 

 wanting in the smutpustule, at least, in the specimens which I have 

 examined. 



Agricultural Experiment Station, 



Sapi'Oho, Hokkaido, Jai'AN, SErT. 25, 1902 



Explanation of Figures in Plate I. 



{In Figs. 1 — V. s represents srautpustule ; I, leaf.) 



Fig. I. — Whole inflorescence above the uppermost node transformed 

 into smutpustule bearing a bract, br., natural size. 



Fig. 11. — Inflorescence and the internode immediately below it trans- 

 formed into srautpustule ; one-half natural size. 



Fig. III. — Fully ripened smutpustule ; the leaf, 1, borne on the latter 

 is nearly dried up; one-half natural size. 



(1) L. H. Pammel, New FunRiis Diseases of Iowa. Jonrn. of Mycology, 1892. 



(2) P. Dietel :— HemibasicUi (in Engler-Prantl's Pdanzenfamilien.) 



