Herbs & Plants


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Botanical Name : Oxydendrum arboreum
Family: Ericaceae
Genus: Oxydendrum DC.
Species: O. arboreum
Kingdom: Plantae
Order: Ericales

Common Names : Sourwood or sorrel tree

Habitat :Sourwood is native to eastern North America, from southern Pennsylvania south to northwest Florida and west to southern Illinois; it is most common in the lower chain of the Appalachian Mountains. The tree is frequently seen as a component of oak-heath forests.

Sourwood is a small tree or large shrub, growing to 10–20 m tall (30 to 65 feet) with a trunk up to 50 cm (20 inches) diameter. Occasionally on extremely productive sites, this species can reach heights in excess of 30 meters and 60 cm diameter. The leaves are spirally arranged, deciduous, 8–20 cm (3-8 inches) long and 4–9 cm (2.5 to 3.5 inches) broad, with a finely serrated margin; they are dark green in summer, but turn vivid red in fall. The flowers are white, bell-shaped, 6–9 mm ( 1/4 to 1/3 inch) long, produced on 15–25 cm (6-10 inches) long panicles. The fruit is a small woody capsule. The roots are shallow, and the tree grows best when there is little root competition; it also requires acidic soils for successful growth. The leaves can be chewed (but should not be swallowed) to help alleviate a dry-feeling mouth.


The bark is gray with a reddish tinge, deeply furrowed and scaly. Branchlets at first are light yellow green, but later turn reddish brown. The wood is reddish brown, with paler sapwood; it is heavy, hard, and close-grained, and will take a high polish. Its specific gravity is 0.7458, with a density of 46.48 lb/cu ft.

The winter buds are axillary, minute, dark red, and partly immersed in the bark. Inner scales enlarge when spring growth begins. Leaves are alternate, four to seven inches long, 1.5 to 2.5 inches wide, oblong to ablanceolate, wedge-shaped at the base, serrate, and acute or acuminate. Leaf veins are Feather-veined, the midrib is conspicuous. They emerge from the bud revolute, bronze green and shining, and smooth; when full grown, they are dark green, shining above, and pale and glaucous below. In autumn, they turn bright scarlet. Petioles are long and slender, with stipules wanting. They are heavily laden with acid.

In June and July, perfect, cream-white flowers are borne in terminal panicles of secund racemes seven to eight inches long; rachis and short pedicels are downy. The calyx is five-parted and persistent; lobes are valvate in bud. The corolla is ovoid-cylindric, narrowed at the throat, cream-white, and five-toothed. The 10 stamens are inserted on the corolla; filaments are wider than the anthers; anthers are two-celled. The pistil is ovary superior, ovoid, and five-celled; the style is columnar; the stigma is simple; the disk is ten-toothed, and ovules are many.

The fruit is a capsule, downy, five-valved, five-angled, and tipped by the persistent style; the pedicels are curving

Medicinal Uses:
Indians boiled the leaves and gave feverish patients the liquid to drink; they also used this tea to treat the urinary ailments of older men.  A poultice of leaves mixed with bark was used to reduce swellings.  The leaves have also been considered a tonic. A tea made from the leaves has been used in the treatment of asthma, diarrhea, indigestion and to check excessive menstrual bleeding.  The bark has been chewed in the treatment of mouth ulcers.The leaves are also a laxative.

Other Uses:
The sourwood is perfectly hardy in the north and a worthy ornamental tree in lawns and parks. Its late bloom makes it desirable, and its autumnal coloring is particularly beautiful and brilliant. The leaves are heavily charged with acid, and to some extent have the poise of those of the peach.

It is renowned for nectar, and for the honey which is produced from it. Juice from its blooms is used to make sourwood jelly. The shoots were used by the Cherokee and the Catawba to make arrowshafts.

The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.


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