River Birch, Water Birch, Yukon Birch
Betula occidentalis
Synonyms: Betula fontinalis, Betula fontinalis var. inopina, Betual microphylla var. fontinalis, Betula occidentalis var. fecunda, Betula occidentalis var. inopina, Betula papyrifera ssp. occidentalis, Betula papyrifera var. occidentalis
The leave sof water birch as seen at the park entrance, Denali National Park and Preserve...................September 4, 2009.
Paul Slichter