444 MR. HISAYOSHI TAKEDA ON THE 
than in any other of the Kurile Islands, and at the same time anticipate that 
not a few plants characteristic of a colder climate had established themselves 
on this island. This is actually the case. The following comparative table 
will show the number of species and the relative percentage common to 
Shikotan and some neighbouring districts. It should, however, be borne 
in mind that, owing to the scanty floristic data of other islands and 
especially of the northern Kuriles, the following numbers may require 
hereafter a slight alteration :— 
Hontó (the main island of Japan )............ 264 species = 81:5 per cent. 
BÑakhallen......... a. 253 4, = TW p.c. 
Yezo ................ bee e bec e eee eee e cette cere cae 298 4, = 920 p.c. 
S. Kuriles (Kunnashiri up to Chiripoi) ... 339 „ = 738 p.e 
N. Wuriles (Shimoshiri up to Shumshu) ... 113. , = 348 p.c. 
25 species or 10:8 per cent. of the Shikotan Flora are mainly distributed 
in the Archipelago of Japan (a few are, however, known to occur, though 
rarely, in Corea). There are 8 species endemic in the Kurile Islands. It is 
very interesting to notice that 42 species are known from Hontô and Yezo, 
but not from Sakhalien. 34 species are known to occur in Sakhalien and 
Yezo, but not in Hontô The following 4 species have not been recorded 
from either Hontó or Yezo, but from Sakhalien ; they are :—Silene repens, 
Sagina saginoides, Epilobium lineare, and Thesium repens ; while Ovyria 
digyna and Clintonia udensis are found in Hontô as well, but not in Yezo. 
There are aiso 5 species occurring only in the Kuriles and Yezo, but not in 
Sakhalien or Hontô, and one of them— Geranium yezoense—is endemic in 
this district ; they are :— Geranium yezoense, Mertensia rivularis, Juphrasia 
mollis, Artemisia laciniata, and Patrinia sibirica. It is also worth while to 
notice that /satis oblongata, Cnicus kamtschaticus, Androsace Chamajasme , 
and Poa cenisia are known from nowhere else in Japan but the Kuriles. 
These are distributed over north-eastern Asia and the Aleutian Islands, and 
a few of them are found in Alaska as well. Lastly, I may perhaps 
mention here that Platanthera minor and Galium triflorum are found in 
Hontó, but have not been recorded from Yezo. While the Galium occurs 
in North America, the Platanthera is endemic in Japan. 
Of those 324 species we now know from Shikotan, 144 species, including 
my Š new species and one variety, are not mentioned in Miyabe’s Flora, 
while 58 genera and 11 families are additions to that publication. In my 
list, given in the following pages, all the additional families, genera, and 
species are indicated with an asterisk, notwithstanding that some of them 
have been published elsewhere. 
To deal with the relationship of the flora of Shikotan alone to that of other 
parts of the world would be of little value, unless the whole Kurile Islands 
