and Old World Birches. 181 
Kenai : Pewinenla and Kadiac Island; while B. alaskana is 
characterized as “the ‘canoe birch’ of all travellers in Alaska,” 
and the range pee includes “the Alaskan coast on the shores 
of Lynn Canal... ; and westward.” Since Lynn Canal lies 
on the coast in the same latitude as Kenai Peninsula and 
A comparison of specimens of Betula kenaica and B. alas- 
kana likewise fails to reveal any cer ysis For instance, 
Coville and ager No. 2,423 of B. kenaica (sheet No. 
me | 
south to Japan, Mandschuria, Mongolia and Sungaria. This 
Asian tree was treated by Regel in the Prodromus as Betula 
alba, subsp. mandshurica and latifolia, while the more 
strongl resiniferous were included in his wns verrucosa, § 
resinife era. The form treated by Regel as subspecies /ati- 
Solia had, mbes been described by Siebold* in 1880 as 
Betula japonica 
* Verh. Batay. Gen., xii (1830), 25, 
