SYNOPSIS OF THE GENUS LONICERA, 33 
On the geographical distribution and the morphological 
and ecological aspects of the genus, which presents some 
very interesting facts, I shall speak more fully in another 
paper; only a few notes on the geographical distribution 
may followhere. The genusis distributed throughout the 
temperate regions of the northern hemisphere, crossing the 
equator only in the Malayan Archipelago, where it reaches 
Java as its most southern point, and northwards extending 
to the arctic circle. Its greatest segregation occurs in cen- 
tral and eastern Asia, where all sections and most subsec- 
tions are represented. In North and Central America only 
twenty species occur, and the European together with the 
Mediterranean flora contains but eighteen species. All the 
rest are Asiatic. Of the two subgenera, Chamaecerasus is 
found throughout the whole range of the genus, while Peri- 
-clymenum does not extend so far north or southward, and 
in central Asia it is represented only by four species, each, 
however, belonging to a different subsection. In Europe 
and in North America, on the other hand, it is well repre- 
sented by many more or less polymorphous species. Of 
the four sections of Chamaecerasus, the section Isika has the 
widest range, but does not reach the Malayan Archipelago. 
Isoxylosteum is restricted to the higher elevations of cen- 
tral Asia and Coeloxylosteum extends from western cen- 
tral Asia through the Mediterranean region to Spain and 
Morocco. Nintooa is well represented in eastern and 
southern Asia and appears again in the western part of the 
Mediterranean region. In North America the subgenus 
Chamaecerasus is represented only by the section Isika with 
7 species, one of them circumpolar. 
In accounting for all published specific and varietal 
names, I have omitted purposely any reference to the 270 
new species proposed by Gandoger,* since his names seem to 
have their origin only in the wish to give to each specimen 
* Flora Europaea 11 ; 14-28 (1886). 
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