204 S. ITO. 



Siuilaccaruni-DigrapJiidis Klcb. 

 Paridi-Digrapliidis (Plowr.) Klcb. 

 Scliundtiaiia Diet. 



Convallariac-Digraphidis (Sopp.) Kleb. 

 Orcliidcarum-Phalnridis 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 Phalnris anindinacca. They arc yEcidia on Convallaria 

 Majalls, MajaiitJtonian Convallaria, Polvgonatuni officinale, P. latifolium 

 var. comnmtatmn, P. Jutniilc, Paris quadrifolia var. obovata and Orchis 

 aristata. Besides these \vc have an yEcidium on Trillium kaintscJiaticnm 

 which is pretty near in its systematic position to Paris. 



Comparing our /Ecidia above mentioned to the description of the 

 European species, I can hardly find any morphological difrcrence between 

 them. From this fact one may be inclined to divide our " Pnccuiia scssilis" 

 into four following species, that is, Puccinia Convallariac-Digraphidis, P. 

 Smilaceartiin-Digraphidis, P. Paridi-Digrapliidis anti /'. Orchidcarinii- 

 Phalaridis. Rut the following factors made me hesitate to treat them in 

 that way. 



1. ^cidium on Convallaria Majalis was collected in Saghalien b\' Mr. 

 T. MiYAKE. He has a sjjccimcn oi Puccinia sp. parasitic on the same host- 

 plant, although it was collected in quite a different localit)- in the same 

 island. 



2. ^cidiiim on JMajanthemum Convallaria occurs comparatively abun- 

 dantly in our country. Puccinia Majantlicmi Diet., a species peculiar to Japan, 

 grows also on the same host-plant, \ery rarely accompanied by the vEcidium. 



3. There is no record of infection experiment with the /Ecidium on 

 Polygonatuni latifolium var. commutatitm and /'. humilc. 



4. Paris quadrifolia var. obovata is found abundantl}" in Hokkaido, yet 

 the ./Ecidium is very rarely found on it. I h.ave collected it only once at 

 Kuriyama, Prov. Ishikari. And I have fiiled to find Phalaris anindinacca 

 in that vicinity. 



