Dwarf bog birch is a small birch of wetlands and streambanks in northeastern Asia. It grows as a shrub, usually no taller than about 10 ft (3 m), instead of forming a tall white-barked tree.
Bog birch (Betula pumila) is native to North America and tends to have rounder leaves with rounded teeth. Dwarf bog birch is from northeastern Asia and usually has longer leaves with sharper teeth; close photos help.
Why they get mixed upBoth are low birches associated with wet places.