A medium-sized tree with sour-tasting leaves and white flower clusters. Important honey plant.

§ Quick facts

SizeHeight 8–20 m
Lifespan75–100 years
OrderEricales
FamilyEricaceae

§ Encyclopedia

Oxydendrum arboreum, commonly known as sourwood or sorrel tree, is the sole species in the genus Oxydendrum, in the family Ericaceae. It 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.

Source: Wikipedia — Oxydendrum Licensed under CC BY-SA 4.0

§ Identification

Field marks. Small to medium tree with smooth gray bark; lance-shaped leaves; drooping clusters of small white bell-shaped flowers.

Similar species. Other native trees (different leaf shape).

§ Diet & behavior

Diet. N/A — photosynthesis

Behavior. Native tree of southeastern Appalachians. Important honey plant — produces distinctive amber sourwood honey.

§ Range

Southeastern US

§ Habitat

Mixed forests, mountain slopes

§ Threats

Forest loss.

§ Conservation status

According to the IUCN Red List, the sourwood is currently classified as Least Concern.

§ What helps

Support southern hardwood forest conservation.

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§ Further reading

§ Sources cited

  • USDA Forest Service Silvics Manual