202 
S. ITO. 
uredosori are generally found on the opposite surface of leaves to the 
teleutosori, in which the uredospores are not found mixed. 
2. The germ-pores of the uredospore are six in the American species, 
while in our species they are inconspicuous and most probably four. 
3. The dimension of our uredospore 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 clavate, sometimes sublinear. 
6. The apex of the teleutospore is 5 — 6 ;x thick in ours, while it is not 
or slightly thickened in the American. 
7. The length of the teleutospore in ours measures 62 /x 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. Puccinia Elymi-sibiricae S. ltd. n. sp. — (PI. XI. Fig. 1 .) 
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 — 22/2; brownish yellow- 
colored ; germ-pores 4 ; paraphyses absent. 
Teleutosori , hypophyllous ; minute, oblong, densely scattered over the 
surface, always covered by epidermis, blackish. Teleutospores cuneiform, 
cylindrical or clavate, apex truncate obliquely pointed or rounded, thickened 
(6—10 / x ), base attenuated, not or slightly constricted at the septum, smooth 
ferruginous, 36 — 70x18 — 22 fx ; pedicels short, brown, subdeciduous. The 
sori are surrounded by a thick bed of brown paraphyses. 
Hah. ( )n Elymus sibiricus L. 
Saghaien.— Nayashi (II. & III. Aug. 12, 1906. K. Miyabe & T. Miyagi). 
Hokkaido. — Prov. Shiribeshi : Okushiri (II. & III. July 27, 1890. K. Miyabe). 
Distrib. Japan. 
