Quercus rubra
A fast-growing North American oak with distinctive bark.
Quercus rubra, commonly known as the northern red oak or common red oak, is a deciduous tree in the red oak group (Quercus section Lobatae). Native to eastern and central North America, it has been introduced to small areas in Western Europe, where it is frequently cultivated in gardens and parks. It is noted for its rapid growth, long lifespan, and distinctive bark with shiny stripes down the center of the ridges.
- field
- Botany
- native_range
- Eastern and central United States, southeast and south-central Canada
- introduced_range
- Small areas in Western Europe
- typical_height
- 28 meters (92 feet), exceptionally to 43 meters (141 feet)
- maximum_lifespan
- Up to 400 years
- known_for
- Fast growth, bark with shiny stripes, and acorns requiring cold stratification
Lore & Background
Quercus rubra grows straight and tall in forests, reaching up to 28 meters, with a trunk diameter of 50–100 centimeters. Open-grown trees may develop a stouter trunk up to 2 meters in diameter. Its bark features ridges with shiny stripes down the center, a trait that extends the entire length of the trunk, distinguishing it from other oaks. The leaves emerge in spring when day length reaches 13 hours, regardless of air temperature, and turn rich red or brown in autumn. Acorns mature over two growing seasons and require at least three months of temperatures below 4°C to germinate.
Reader's Guide
Quercus rubra is significant as the most common oak species in the northeastern United States after the pin oak, and its population has increased since European settlement due to forest clearing that reduced formerly dominant white oaks. It serves as a model organism for studying symbiotic relationships, dispersal, and habituation across temperate environments. The species faces threats from canker pathogens such as Diplodia corticola and fungi like Phytophthora cinnamomi and Phytophthora ramorum, as well as oak wilt caused by Bretziella fagacearum. Insect pests include the red oak borer and spongy moths. Despite these stresses, the northern red oak has adapted moderate resistance to flooding and heat stress, maintaining photosynthetic activity under high carbon dioxide levels. Its wood is used in construction and furniture, and its acorns, though bitter due to tannins, are eaten by deer, squirrels, and birds.
Did You Know?
- Northern red oak is the only oak with bark striping all the way down the trunk.
- Its acorns require at least three months of temperatures below 4°C to germinate.
- A living example of 326 years was noted in 2001.
- The species is self-incompatible and wind-pollinated.
More in Flowering Trees & Shrubs 1-20
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