Betula szechuanica

Betula szechuanica (Sichuan Birch or Szechuan birch) is a birch species native to Sichuan, China, conical in shape, growing to 20 meters in height, with white bark, yellow-green male catkins or green female catkins, and dark, blue-green leaves. == Synonyms == ...
Found on http://en.wikipedia.org/wiki/Betula_szechuanica
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