98 Nr. 2. C.H. OSTENFELD and C. SYRACH LARSEN: 
usually of a very summary character, usually based only 
on the accounts of others. 
Of the many statements regarding its occurrence in 
North America, there are only two authors who could 
Fig. 33. L. Gmelini X sibirica. Kurkut on the west side of Lake Baikal, 
(leg. Sukatschew, 1928). (Nat. size, upper row dry, lower row wet). 
have based their records on personal observations. The one 
MacnaB (in the Quart. Journ. Agric. V, 1834—35, pp. 594 
—605), simply mentions one species of larch (Larix pendula) 
observed by him in the neighbourhood of Lake Ontario, 
and his description coincides entirely with L. laricina, thus 
being of no value as regards the present question. The 
other description, which strikes one as more convincing, 
is given by PursH (Flora Americae Septentrionalis, II, 1814, 
