Betula pumila

Swamp or dwarf birch is a member of the birch or Betulaceae family and is a shrub that occurs in a vast area from Alaska to Oregon and then eastward to New England. It reaches 4 m in height.

• Leaves are alternate, simple, small, coarsely serrated, rounded at the base and close together.
• The species is monoecious, with male and female catkins in the spring.