52 Illustrations of Conifers. 



KEY TO LARIX. 



A. LEAVES DEEPLY KEELED ON BOTH SURFACES. 



Larijc Lyallii, Parlatore. Young branches covered with a dense greyish tomentum 

 which persists in part in the second year. 



B. LEAVES KEELED ONLY ON THE LOWER SURFACE, THE UPPER SURFACE BEING FLATTENED OR 

 ROUNDED. 



* Young branchlets pubescent. 

 t Leaves glaucous, bluish, with two conspicuous bands of stomata on the lower surface. 



Larix kptolejris, Endlicher. Branchlets of the second year reddish, with a glaucous 

 tinge. Leaves numerous in the bundle, long and slender, arranged in an erect, 

 cone like pencil. 



Larix kurilentis, Mayr. Branchlets of the second year shining, reddish-brown, pubes- 

 cent, not glaucous. Leaves few in the bundle, short and very broad, spreading so 

 as to form an open cup round the bud. 



1 1 Leaves greenish, with two inconspicuous bands of stomata on the lower surface. 



Larix Griffithii, Hooker. Branchlets of the second year very stout, dull reddish-brown ; 

 pubescent. Short shoots broad and fringed above by very large loose reflected 

 pubescent membraneous bud-scales. 



Larix occidentalis, Nuttall. Branchlets of the second year slender, light brown, shining, 

 pubescent. Short shoots slender, with a narrow conspicuous fringe of bud-scales. 



Larix rilririca, Ledebour. 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. 



* * Young branchlets glabrous. 

 t Branchlets yellowish-grey in colour. 



Larix europcea, De Candolle. Branchlets of the second year shining, glabrous, yellowish- 

 grey. 



1 1 Branchlets brown in colour. 



Larix americana, Michaux. Young branchlets often glaucous. Branchlets of the 

 second year shining brown. Short shoots blackish. Leaves short, not exceeding 

 1J inches in length. 



(1). In certains specimens of this species the branchlets are indistinguishable from those of Larix 

 eurojma, and in the absence of cones only show a difference in the leaves which are very long and slender in 

 L. nbirica, 



Larix dahurica, Turczaninow. Young branchlets never glaucous. Branchlets of the 

 second year shining brown. Short shoots blackish. Leaves long, exceeding 1J 

 inches in length. 



These two species strongly resemble each other in technical characters, but are readily distinguished as 

 seen in cultivation in this country by the appearance of the branchlets which in L. dahurica are vigorous, 

 lopg and straight, whereas in L. americana, which makes slow growth, they are short, curved and twisted. 



Larix occidentalis, Nuttall, var. In glabrous specimens of this species the chestnut- 

 brown short shoots will readily distinguish them from either of the two preceding 

 species. 



