10 Nr. 2. C. H. OSTENFELD and C. SYRACH LARSEN: 
to 2900 m. above sea-level. Specimens were subsequently 
found in the Chumbi valley, in the extreme south of Tibet, 
at an altitude of 3000 m., and in Sikkim it is stated to 
grow at elevations ranging from 2400 to 3600 m. above 
sea-level. These facts show it to be indigenous to the 
Larix Griffilhiana (ESS G)Carr 
highest tree-clad regions of the eastern Himalayas in the 
neighbourhood of the forest line, and only in the heart of 
vallies leading from north and south to the mighty peaks, 
the final and only mantle of which is the eternal snow. 
Hooker found it growing over ancient moraines at a height 
of 3600 m. above sea-level, where it attained its best 
development. He also found it upon grass-clad or thicket- 
strewn mountain slopes, but only where the soil was stony 
and the drainage good. It is thus shown to be a pronounced 
mountain tree, choosing the fresh, light soil for its abode. 
It represents the most southerly species of the genus, lat. 
27°—28 N. (Map: ]). 
