Larix 347 



1899, and some of these have been grafted on the common larch and are now 

 growing in the Arnold Arboretum, Massachusetts. 



This larch in botanical characters stands nearest to L. occidentalis. Occurring 

 at a high elevation in Shensi at about lat. 38°, it should prove perfectly hardy in this 

 country ; but must not be expected to be of much importance as a forest tree. 



The remaining species, ten in number, are tolerably well known, and are readily 

 distinguishable by the characters of the cones and flowers. In the absence of cones, 

 the following arrangement will give a good clue to the species : — 



A. Leaves deeply keeled on both surfaces. 



1. Larix Lyallii, Parlatore. Western N. America. 



Young branchlets completely covered with a dense greyish tomentum, which 

 persists in part in the second year. 



2. Larix Potanini, Batalin. Western China. 



Young branchlets bright yellow in colour, with a scattered pubescence. 



B. Leaves keeled only on the lower surface, the upper surface being flattened or 



rounded. 



* Young branchlets pubescent. 



■f" Leaves glaticous, bluish, with two conspicuous bands of stomata, each of five lines, 

 on the lower suiface. 



3. Larix leptolepis, Endlicher. Japan. 



Branchlets of the second year reddish, with a glaucous tinge. Leaves 

 numerous in the bundle, at least forty, long and slender, arranged in an 

 erect cone-like pencil. 



4. Larix htrilensis, Mayr. Kurile Islands. 



Branchlets of the second year shining reddish brown, pubescent, not glaucous. 

 Leaves few in the bundle, often only twenty to thirty, short and very broad, 

 spreading so as to form an open cup around the bud. 

 ft Leaves greenish, with two inconspicuous bands of stomata, each of two to tJiree 

 lines, on the lower s^trface. 



5. Larix Griff thii, Hooker. Himalayas. 



Branchlets of the second year very stout, dull reddish brown, pubescent. 

 Short shoots broad and fringed above by very large loose reflected 

 pubescent membranous bud-scales. 



6. Larix occidentalis, Nuttall. Western N. America. 



Branchlets of the second year slender, light brown, shining, pubescent. Short 

 shoots slender, with narrow inconspicuous fringe of bud-scales. 



7. Larix sibirica, Ledebour. Russia, Siberia. 



Branchlets of the second year slender, shining, greyish yellow, glabrous, the long 

 hairs present in the furrows between the pulvini of the first year's shoot 

 having fallen off. Leaves very long and slender, up to 2 inches in length. 



