Betula fruticosa

About

Betula fruticosa, commonly known as dwarf bog birch or Japanese bog birch is a species of dwarf birch native to southern Siberia and the Russian Far East, northern China, Mongolia, Korea, and Japan. In Japan it is found only in Tokachi Subprefecture on the island of Hokkaido. In China it grows in Heilongjiang, Inner Mongolia, and the Changbai Mountains of Jilin.

Summary from Wikipedia