60 Nr.2. C. H. OSTENFELD and C. SYRACH LARSEN: 
Herbarium, but other information with respect to the 
colour is lacking. This larch is not found in cultivation 
in Denmark, where everything bearing a resemblance to 
it almost certainly has its origin in Korea, and belongs to 
var. olgensis. 
DALLIMORE & JACKSON (Handb. Conif. 1923, p. 298) are 
incorrect in citing REHDER & WILSON as the authors of 
the species L. Principis Rupprechtii; REHDER & WILSON were 
the first to classify it as a variety of L. dahurica, while 
Mayr must still be accounted the author of the species, 
if it is to be maintained as such. 
On the occasion of the Arnold Arboretum Expedition 
to the East in 1917—1918, WiLson discovered a larch with 
a peculiar cone,- which he has named L. dahurica var. 
Principis Rupprechtü f. viridis. Two trees of unknown origin 
have been planted near the monastery of Yutingi in Kongo- 
san in the province of Kogan in Korea. The cones of the 
specimen lying before us (No. 10508) vary in length from 
2,5 to 3,5 cms., and in breadth from 2,3 to 2,6 cms. (open 
and dry). The cone-scales are faintly emarginate, of a 
reddish-brown colour, with a distinct blue bloom. The 
bracts are blue-black, and are visible between the cone- 
scales. The light, open structure of the cone characteristic 
of L. Gmelini and its varieties is absent; in its place there 
is a close, solid structure which, together with the long, 
cylindrical cone, is reminiscent of L. decidua. It is impos- 
sible to come to any definite conclusion with regard to 
this form; further researches on the spot and cultivation 
are necessary. 
Herb. Mat. examined: 
Po hua shan, China bor. 1876, BRETSCHNEIDER No. 14480 (Kew; Brit. 
Mus.). — Wutai shan, Wutai village, temple grounds, Shansi prov. 1909, 
