ox THE UREÜINEAE PARASITIC ON THE JAPANESE GRAMINEAE. 227 



cinia on Phragmites comvuinis, I was able to find the following differences. 

 By its longer pedicel and larger spores, our species is distinguished from 

 Pucclnia Magnitsiana and P. siinillima. And from other species, our plant 

 is easily distinguished by its narrower and cinnamon-colored spores. The 

 basidiospores of this species have no power to infect Rumex domesticus. 



43. Puccinia aestivalis Diet., in Engl., Bot. Jahrb., 34, 1905, (585) ; 



37, 1906. (loi).— (PI. XII. Fig. 3). 



Hab. On Pollinia nuda Trin. 



Honshu.— Prov. Musashi : Tokyo (II. July 1901. G. Vamada ; III. Sept. 22, 1905. N. Nambu). 

 — Prov. üzen : Ömagari (II. & III. July 31, 1908. M. Miura). 

 Distrib. Japan. 



Remarks. Dietel (S) writes that the teleutospores germinate at once 

 when ripe. I also recognized the same fact in our specimens. According to 

 him its teleutospores are somewhat like those oi Puccinia PollinicB BarcL, of 

 Himalaya in general characters. 



According to DlETEL (9), tiiis fungus has two kinds of uredospores; one 

 is globose or oval in shape, echinulatc, with a light brownish-colored thin 

 cpispore, while the other is piriform or oval in shape, nearly smooth, and 

 deep brown in color. 



From the statement of Dietel it seems that these two kinds of uredo- 

 spores occur in separate sori ; but during the course of my study, I found that 

 both of them are formed in the same sorus. 



44. Puccinia microspora Diet., in Engl., Bot. Jahrb., 37, 1906, (loi). — 

 (PI. XII. Fig. 4). 



Hab. On Rottboellia coinprcssa L. Ma.r.Japonica Hack. 

 Honshu. — I'rov. Mus.-islii : Tokyo (II. & HI. Oct. 12, 190-I. N. Nambu). 

 Distrib. Japan. 



Remarks. I was able to examine the type specimen of this species by 

 the kindness of Mr. N. Nambu. The present species differs entirely, as 

 Dietel (9) remarked, from Urcdo Rottba'lliiv and Puccinia Rottbcsllice. 

 Compared with Urcdo Rottbccllia:, the uredosori of our species are smaller 

 in size, and are generally loosely covered by the epidermis, and also 

 its urdospores are smaller with capitate paraphyses intermixed with them. 



