202 S. ITO. 



uredosori arc generally found on the oj)positc SLirface of leaves to the 

 teleutosori, in which the uredospores are not found mixed. 



2. The germ-pores of the medosporc arc six in the American species, 

 while in oiu' species they are inconspicuous and most probably four. 



3. The dimension of our urcdospore is a little larger than that of the 

 American species. 



4. The teleutosori are recorded to be amphigenous, while ours are 

 exclusively hypophyllous. 



5. The teleutospores in our species are subcylindrical or cylindrical, 

 while the American are oblong-clavate or clavatc, sometimes sublinear. 



6. The apex of the teleutospore is 5 — 6// thick in ours, while it is not 

 or slightly thickened in the American. 



7. The length of the teleutosjDore in ours measures 62 11 at its maximum, 

 while 70/-! in the American species. 



These differences will, I believe, sufficiently support the establishment 

 of a new species of rust fungi. 



16. Pitccinia Elymi-sibiricae S. Ito. n. sp. — (PI. XL Fig. i.) 



Uredosori, amphigenous, mostly epiphyllous ; minute, oblong, scattered 

 or gregarious, sometimes arranged in lines, naked, with the ruptured 

 epidermis, pulverulent, dark orange-colored. Uredospores, globose, sub- 

 globose or ovate, verrucoso-echinulate, 28 — 32x20 — 22,«; brownish yellow- 

 colored ; germ-pores 4 ; paraphyses absent. 



Teleutosori, hypophyllous ; minute, oblong, densely scattered o\'er the 

 surface, always covered by epidermis, blackish. Teleutospores cuneiform, 

 cylindrical or clavate, apex truncate obliquely pointed or rounded, thickened 

 (6— 10,«), base attenuated, not or slightly constricted at the septum, smooth 

 ferruginous, 36 — 70x18 — 22//; pedicels short, brown, subdeciduous. The 

 sori arc surrounded by a thick bed of brown paraphyses. 



Hab. On Elyiiins Sibiriens L. 



Saghaien.— Nayashi (II. & III. -Vug. 12, 1906. K. MiYAi;r. & T. Miyagi). 



Hokkaido.— I'rov. Shiribeshi : Okushiri (II. & III. July 27, 1S90. K. ^iIivaijk). 



Distrib. Japan. 



