The Species of the Genus Larix. 5 
great assistance from the Scottish Department of Forestry, 
Mr. J. M. Murray having on several occasions sent us im- 
portant material of the Larix species cultivated in Scotland. 
In this paper, however, as said above, we have restricted 
ourselves to laying particular stress upon the wild-growing 
Jarches, that is to say, the genus Larix as it occurs in 
nature, and have in most cases deferred the treatment of 
the cultivated forms. 
We take this opportunity of expressing our gratitude 
to all those who, in one way or another, have assisted us 
in our labours. 
Two maps and a very short summary of some of the 
results of the results of the present paper were published 
by us in “Die Pflanzenareale 2. Rh. Heft 7. 1930”, as Karte 
62—64. | 
Il. Larix, Miller. 
Larix, Miller, is a very well-defined genus. It differs 
from all the other genera of Pinaceae in being deciduous, 
and in the dwarf as well as the long shoots being provided 
with green leaves. Only its near relative, Pseudolarix, also 
has deciduous leaves, but the latter differs in possessing 
cones, which drop their scales at maturity. 
The genus is only found in the northern hemisphere, in 
the southern part of which it only occurs spontaneously 
in mountainous regions, while towards the north, and 
particularly in the Arctic regions, it goes down to the 
lowlands, where it forms extensive forests. 
The genus is divided into 10 species and three varieties, 
some of which are but little known even to-day. 
They may be classified as follows: — 
