IOO 
T. MIYAKE. 
2 . Puccinia Osmorrhizae (Peck) Cke. et Peck in XXIX. Rep. State 
Mus. New York, p. 73 (1878) ; Syd., Monogr. Ured. I. p. 397. 
Syn. : ZEcidium Osmorrluzce Peck, 24. Rep. p. 92. 
Puccinia Osmorrluzce, Lindr., Umbell. Ured. S. 17. (1902). 
Spermogonia , circularly clustered, light yellow colored. 
dEcidia, hypophyllous, or on the petioles and stems ; cup-shaped, 
yellowish, with slightly torn edges ; those on the leaves, small, roundish or 
oblong, clustered on small yellowish spots, and those on the petioles and 
stems in elongated clusters. ZEcidiospores, polygonal, globose, orange 
yellow, 18-32 X 16-25//.. 
Uredosori, hypophyllous ; scattered, small, powdery, cinnamon-colored. 
Uredospores, subglobose, ovate or elliptical, echinulate, yellow or yellowish 
brown, 22-30 X 18-27// > germ-pores 3 or rarely 2. 
Teleutosori , hypophyllous ; blackish, surrounded by the ruptured epider- 
mis. Teleutospores, elliptical or oblong, apex not thickened, slightly con- 
stricted, base slightly attenuated, reticulated, chestnut-brown, 33-53 x 
22-27// > germ-pore of the upper cell at the apex, that of the lower at 2/3 
from the septum ; pedicels, hyaline, slender, deciduous. 
Hab. On Osmorrhiza japonica Sieb, et Zucc. 
Hokkaido. — Prov. Iburi : Mororan (II. & III. G. Yam ADA. July 21, 
1897), Usu (III. G. YAMADA. July 23, 1897). 
DlSTRIB. North America and Japan. 
Remarks. This species is very closely related to P. Chcerophylli. Ac- 
cording to LlNDROTH (i) these two species are exactly alike in the 
•character of their teleutospores and secidiospores ; but in the uredospores 
they show a marked difference. The uredospore of P. Osmorrluzce is said 
to be slightly smaller in size than that of P. Chcerophylli ; and the wall 
of the spore decidedly thicker in the former than in the latter. Moreover, 
the number of the germ-pores is 2 in P. Osmorrluzce , and 3 in P. Chcero- 
phylli. These differences, however, do not hold good in the Japanese 
specimens. A careful comparison does not reveal any difference in their 
size, in the thickness of their wall nor in the number of their germ-pores. 
In fact, our form may perhaps differ from the American type. But until 
