﻿422 ON THE BOTANY OF JAPAN. 



Amon"- the few Lycopodiacece the only thing remarkable is the discovery of our 

 Eastern American Lycopodium lucidulum, Michx., in Japan. Its known northwestern 

 limit before was the valley of the Saskatchawan. Our L. dendroidetim, however, which 

 rano-es Avestward to the northwest coast, was already known in Kamtschatka and 

 Eastern Siberia. 



The Musci of the collection are now under examination by Messrs. Sullivant and 

 Lesquereux. They exhibit a similar mixtm-e of North American and of European species. 

 The Lichenes, which Professor Tiickerraan, and the Alfja, which Professor Harvey, are 

 now studying, will probably afford interesting geographical data. The Fun(ji, upon 

 which jNIessrs. Berkeley and Curtis have drawn up a report, are too cosmopolitan for 

 our purpose. 



In the following table I have endeavored to enumerate the species, or at least the 

 genera, of the Japanese plants known to me, which have particular relatives in other 

 and distant parts of the northern temperate zone. Tropical or subtropical forms, of 

 which there are a few in the southern districts, are omitted. So are all the types peculiar 

 to the Japano-Chinese region, or which have near relatives only in tropical or southern 

 parts of the world, and all weeds or other plants which may owe their present diffusion 

 to man's agency. Some species enumerated in the Japanese column which have not 

 fallen under my observation, are distinguished by being enclosed in parentheses. 



A very few species are mentioned which as yet have been found only on the adjacent 

 mainland, as Sedum sedoides on the Chinese, and Streptopus roseus on the Okotsk 

 coast. 



In parallel columns on each side, I have added the identical, analogous, or nearly re- 

 lated species, so far as known to me, or for which there is good authority, indigenous on 

 the one hand to Western North America (i. e. to the district west of the Rocky INIoun- 

 tains, or at least west of the great plains of their eastern slope) and to Eastern North 

 America ; on the other hand, to Central and Northern Asia, and to Europe. 



For Northern Asia, Ledebour's Flora Rossica is a sufficient guide. Only those 

 species are mentioned in this column which range westward as far as the Davurian, or 

 eastward as far as to the Altaic region. For the central or Himalayan region the 

 means of comparison available to me are necessarily very imperfect, until Drs. Hooker 

 and Thomson have proceeded farther with the Flora Indica and the Prsecursores, and 

 with the distribution of their great collections^ of which I am generously allowed a 

 share. I cannot pretend to have examined many of the Himalayan species here men- 

 tioned ; nor am I able to estimate their relationship to their Japanese congeners at all 

 critically. So that I have generally cited only identical or apparently closely repre- 



