Sourwood
Sourwood, or Sorrel Tree, a deciduous tree native to the eastern United States. This tree can grow up to 70 feet (21 m) tall, but its usual height is about 25 feet (8 m). It is often grown as an ornamental. Its lustrous green leaves are oblong, reaching a length of about 7 inches (18 cm). The bark is gray, tinged with red. In July or August, the tiny white, bell-shaped flowers bloom; they are about 1/3 of an inch (8 mm) long. The flowers are borne in long, drooping clusters 6 to 8 inches (15 to 20 cm) long. About a month later the flowers develop into grayish fruit. In the autumn, the foliage turns a brilliant scarlet. The tree is named for the sour taste of the leaves and twigs.
The sourwood is Oxydendrum arboreum of the heath family, Ericaceae.