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The Species of the Genus Larix. 
(very small coned). (Ottawa Herb.). — Ohio: 1 coll. (Gray Herb.). 
— Buffalo, G. W. CLINTON (Brit. Mus.). — Maine, Dr. A. Gray, 1877 
(Kew). — Maine, J. BLAKE (Brit. Mus.). — BROwNVILLE, Maine, Aug. 
29, 1895, J. G. Jack (Arn. Arb.). — New Hampshire, 5 colls. in Arn. Arb. 
at Gray Herb. — Adirondacks Mt. New York, T. S. BRANDEGEE, 1884, 
Ex. Herb. Univ. Calif. (Hort. Bot. Haun.). 1 other coll. of New York 
(Gray Herb.). — Near Port Huron, St. Claire Co. Michigan, C. K. Dopge, 
October 11, 1891 (Arn. Arb.). — North of College, Agricultural College, 
Michigan, 1898 (Arn. Arb.). — Roadside near Douglas Lake, Cheboygan 
Co., Michigan, J. H. Exvers, July, 7, 1917. (Arn. Arb.). — Michigan, 3 colls. 
one red coned (Gray Herb.); also in U. S. Nat. Herb. — Wisconsin: 3. 
eolls. (Gray Herb.). — Illinois (Gray Herb.). — Maryland, Pennsylvania, 
New Jersey and Indiana (U. S. Nat. Herb.). — Saskatchewan, North 
of Prince Albert, Macoun, 1896 (small coned) (Ottawa Herb.). — N. 
W. Ter., Lat. 61° Long. 104°, TyrELL, 1893 (Ottawa Herb.). — Lake Huron, 
Dr. Topp (Kew.). — Winnipeg Lake, 1884, Jas. M. Macoun (Ottawa Herb. ; 
Brit. Mus.). — Lake Superior, HEIMBÜRGER 1928 (Hort. Bot. Haun.). — 
Heron Bay, C. H. OsTENFELD, 1924 (Hort. Bot. Haun.). — Charlotte, Ver- 
mont, 1877, C. G. PRINGLE (Kew). — Mac. Cubbins Lake, Minnesota, E. 
P. SHELDON, May, 1895. Ex. Herb. Univ. Calif. (Hort. Bot. Haun.). — 
Swamps at Mineral Springs 1913, Ove Pautsen (Hort. Bot. Haun.). 
Dease River, Northern Brit. Col., Dawson, 1887 (Brit. Mus.; Ottawa 
Herb.). — Kokomo Creck, 40 ml. north of Fairbanks, Alaska, L. M. 
PRINGLE, Aug. 17, 1909. (U. S. Nat. Herb. et ex U. S. Nat. Herb. in Hort. 
Bot. Haun.). — Fort Gibbon Alaska, A. G. MapprEw, Ex. Herb. U. S. Nat. 
Herb. (Hort. Bot. Haun.). — Fort Gibbon along the Yukon River, A. S. 
Hircucock, 1909 (U. S. Nat. Herb.). — E. KoExxE : Herb. dendrologicum 
(Hort. Bot. Haun.). 
IV. Hybrids. 
There are three areas where two different species of larch 
meet in nature. In two cases, those of L. Potanini—L. Ma- 
stersiana, and L. occidentalis—L. Lyallii, the species are so 
little known and so closely related, that it has hitherto 
been impossible to distinguish hybrids between them. In 
the third case, however, where the question is one of two 
widely differing species, L. sibirica—L. Gmelini, it is evident 
that hybrids are produced in the areas where their respec- 
tive boundaries meet. 
