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The Species of the Genus Larix. 19 
Larix spec. POTANIN found the material for BATALIN's type 
in the neighbourhood af Ta-tsien-lu in 1893, and the 
majority of the subsequent finds originate from this locality. 
Specimens were found by Purpom in 1910—1911 in Kansu 
and Shensi, and by Rock in 1922 and 1924 as far south 
as the mountains around Yangtsze in the north-west of 
Yunnan (Journ. Arnold Arb. VII. 1926, p. 46). Several other 
finds had already been made in the north-west of Yunnan 
by HANDEL-MAZZETTI in 1914—18, but they were first re- 
ported in 1929 (HAnDEL-MAZZETTI; Symbolae Sinicae, VII, 1, 
1929). HANDEL-MAZZETTI also reports its occurrence from the 
south of Szechuan, and as far west as the mountains 
between Salween and the Irrawady in the extreme north- 
east of Burma. It is found in the greatest abundance, 
forming forests, at an altitude of about 3000 and 3400 m. 
above sea-level, and in scattered groups down to 2700 m. 
above sea-level. | 
The material for BEıssneEr’s L. chinensis was found in 
1893—94 by Father GiuserrE GirRALDi at Tai-pei-shan in 
Shensi, and Purpom’s discovery originates from the same 
locality. This, together with the fact that the original 
material of L. Polanini agrees with BEıssneEr’s illustration 
(Fig. 70 in Nadelholzk. 1909), proves that the two species 
are identical. FRANCHET's L. tibetica, which was found by 
Prince Henry d’Orleans near Ta-tsien-lu, where so many 
finds of L. Potanini have subsequently been made, 
also coincides in every respect with the latter. 
The length of the cone varies from 2,5—7,5 cms. Two cones 
from the already-mentioned highest known locality, north- 
east of Ta-tsien-lu, 3300 to 4800 m. above sea-level (WILSON 
No. 903) measure 2,5—3 cms. Two other cones from 
Wırson’s material collected from about the same district, 
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