16 Nr. 2. C. H. OSTENFELD and C. SYRACH LARSEN: 
L. Mastersiana is the link between L. Griffithiana and L. Po- 
tanini. It differs from the former in the size of the cones, which 
in the case of L. Mastersiana are not more than about half as 
Fig. 3. L. Mastersiana Rehd. 
& Wils. Cones from China 
Western Szechuan. (leg. E. 
H. Wilson 1908) (Nat. size, 
upper row dry, lower row 
wet, the same two cones). 
long as those of the Himalayan 
larch. The difference in length 
between the bracts and the cone- 
scales is also much more marked 
in the case of L. Griffithiana than 
of L. Mastersiana. The two spe- 
cies differ in point of habitus, 
the branches of the second order 
of L. Griffithiana being consider- 
ably more pendulous than is 
the case with L. Maslersiana. 
Compared with L. Potanini, 
the difference is most pronounc- 
ed with regard to the orange or 
reddish-brown bark on the one- 
vear’s shoots of the latter, tog- 
ether with the comparatively 
short, straight, bracts, and the 
purple-red colour of the cones; 
in comparison, the bright, yellow- 
ish-brown shoots, and the 
longer, strongly recurved bracts, 
and the red and brown cones of 
L. Mastersiana, are very distinctive. 
Following upon his discovery of L. Mastersiana in 1908, 
WILSON sent seeds to the ARNOLD Arboretum, but the tree 
is not yet in culture in Denmark. 
Herb. Mat. examined: 
W.SzEcHuan No. 906, E. H. Wırson 1908, Type, in Arn. Arb.; also in 
U. S. Nat. Herb.; Brit. Mus.; Kew Herb.; Hort. Bot. Haun. — 
