Leaves ovate in shape and finely toothed. Bark is dark brown or gray, shiny, and usually not peeling, and may be furrowed when mature. Broken twigs are fragrant with the scent of wintergreen. The flowers and fruit are produced in hanging catkins; the small winged seeds are released in the fall and winter. Found mostly in moist woods.
Black birch has both male and female flowers that bloom in April. The male catkins are 2-3 inches long, while the female catkins are only 1 inch long.