236 
S. ITO. 
Brachypodiitm silvaticum is the only plant I have examined as a host 
for this fungus. P. Hennings recorded Brachypodium japonicum as its 
host-plant. 
/Ecidium stage only, found in Japan. 
56. Puccinia perplexans Plowr., Quart. Journ. Micr. Sc., 25, 1885, 
(164); Brit. Ured. and Ustil., 1889, (179); Sacc., Syll., 7 , 1888, (632); 
Dietel, in Hedw., 28, 1889, (278); in Engl., Bot. Jahrb., 34, 1905,(585); 
Klebahn, Zeits. f. Pflanzenk., 12, 1902, (145); Sydow, Monogr. Ured., 1, 
1904, (719). 
Syn. : dEcidium Ranunculaceariun DC., FI. franc., 6 , (97). 
Hab. On Ranunculus acer L. var. Steveni Rgl. 
Sagbalien. — Kshunnai (I. July 7, 1906. 'I'. Miyake). 
On Ranunculus acer L. ? 
Saghalien.— Odomari (I. June 19, 1906. T. Miyake) ; Darny (I. June 27, 190b. T. Miyake). 
On Ranunculus japonicus Langs. 
Hokkaido. — Prov. Ishikari : Sapporo (I. June i 5 , 1890. K. Miyaiie ; 1 . June 3, 1900. G. 
Yamada) ; Horomui (I. June 13, 1897. G. Yamada). 
Honshü. — Prov. Musashi : Shimura (I. May 1, 1901. K. Miyabe). 
Distrib. Europe and Japan. 
REMARKS. In Europe, the present species produces its uredo- and 
teleutospores on Alopecurus pratensis ; whose genetic relation with the 
ZEcidium on Ranunculus acer was experimentally proved by PLOWRIGHT 
in 1885. 
The presence of the uredo- and teleutospores of this fungus in Japan is 
not yet recorded. In 1905, DlETEL identified the ^Ecidium on Ranunculus 
acer var. japonicus as the present species from the specimen sent to him 
by Mr. NAMBU. 
The specimens preserved in the University Herbarium are on Ranun- 
culus acer var. Steveni and var. japonicus. They agree exactly in their 
morphological characters with the European specimens of Puccinia per- 
plexans. Another form of TEcidium on Ranunculus acer in Europe was 
combined experimentally by ScilROETER with Uromyccs Dactylidis. The 
uredo- and teleutospores of this Uromyces are also not yet found in our 
