204 
S. ITO. 
3- 
P. 
Smilacearum-Digra phidis Kleb. 
4- 
P. 
Paridi-Digraphidis (Plowr.) Kleb. 
5- 
P. 
Schmidtiana Diet. 
6. 
P. 
Convallariae-Digraphidis (Sopp.) Kleb. 
7- 
P. 
Orchidearum-Phalaridis Kleb. 
In the absence of infection experiments, it is difficult to say to^ which of 
these seven biological species our plant belongs. 
There are also in our country several aecidial forms on the same or 
related host-plants as those found in Europe, which have a relation with 
Puccinia on Phalaris arundinacea. They are TEcidia on Convallana 
Mafalis, Majanthemum Convallaria, Polygonatum officinale, P. latifolium 
var. commutatum, P. humile, Paris quadrifolia var. obovata and Orchis 
aristata. Besides these we have an yEcidium on Trillium kamtschaticum 
which is pretty near in its systematic position to Paris. 
Comparing our TEcidia above mentioned to the description of the 
European species, I can hardly find any morphological difference between 
them. From this fact one may be inclined to divide our “ Puccinia sessilis ” 
into four following species, that is, Puccinia Convallariae-Digraphidis , P. 
Smilacearum-Digraphidis, P. Paridi-Digraphidis and P. Orchidearum- 
Phalaridis. But the following factors made me hesitate to treat them in 
that way. 
1. ^Ecidium on Convallaria Majalis was collected in Saghalien by Mr. 
T. MIYAKE. He has a specimen of Puccinia sp. parasitic on the same host- 
plant, although it was collected in quite a different locality in the same 
island. 
2. TEcidiüm on Majanthemum Convallaria occurs comparatively abun- 
dantly in our country. Puccinia Majanthemi Diet., a species peculiar to Japan, 
grows also on the same host-plant, very rarely accompanied by the TEcidium. 
3. There is no record of infection experiment with the Aicidium on 
Polygonatum latifolium var. commutatum and P. humile. 
4. Paris quadrifolia var. obovata is found abundantly in Hokkaido, yet 
the TEcidium is very rarely found on it. I have collected it only once at 
Kuriyama, Prov. Ishikari. And I have failed to find Phalaris arundinacea 
in that vicinity. 
