50 Nr. 2. C. H. OSTENFELD and C. SYRACH LARSEN: 
of its tributary, the Aldan River, and still farther northwards, 
L. Gmelini occurring alone to the south of it. Mayr based 
his opinion upon material collected by CAJANDER in the 
course of his journey along the Lena from its source to its 
estuary; but CAJANDER himself described all the larches 
along the lower course of the Lena as L. Gmelini. Comparing 
Mayr’s illustration of L. Cajanderi (Fremdl. Wald und Parkb. 
1906, Fig. 88) with TRAUTVETTER’S L. dahurica (Pl. Imag. 
Descrip. Fl. Russ. Ill. Fasc. 7, 1846, Plate 32), one may well 
go so far as to say that Mayr’s specimens represent a very 
typical L. Gmelini; it originates, moreover, from a northerly 
locality (North of lat. 63° N.) similar to that from which 
TRAUTVETTER derived his material (lat. 72'/2° N.). — 
L. Gmelini is stated to have been introduced into Europe 
in 1827, and put into culture in Denmark in 1889 (or earlier), 
where attempts have been made to utilise it in the forests 
(A. OPPERMANN: 1923, p. 271). To judge by its occurrence 
on the cold, foggy coasts of the sea of Ochot, it is 
reasonable to suppose that it possesses forest-forming 
capabilities in other unfavourable localities, of which we 
have a pronounced example in the Faeroe Islands. 
Besides the variations which we do not think are worth 
keeping as special varieties (L. kurilensis and L. Cajanderi), 
the species-complex L. Gmelini has two geographical 
varieties of more systematic value, viz., var. olgensis and 
var. Principis Rupprechtii, both of which occur south of the 
area of occurrence of the real L. Gmelini. 
Herb. Mat. examined: 
Ad. fluv. Boganida 72'/2°, MippENDoRFF (Hort. Bot. Haun.); type col- 
lection to L. dahurica. — Sib. Orient. Udskoi, Exp. Acad. 1844 (Kew). — 
Ochotsk Sea, C. WRIGHT, Coll. U. S. Explor. Exp. 1853—56 (Kew). — 
Amur, Maximowicz, ex Herb. Hort. Petropol. — Maximowicz, Iter secund, 
1860. Manchuria austro-orient. ad. fontes fluv. Fundim (Kew). — Manschur. 
