Arboretum Trees—River Birch

Betula nigra

River birch is a popular deciduous tree known for its characteristic bark which changes as it matures. Young trees have a mosaic of peeling, papery bark of a silvery color that curls back to reveal a sterner bark that is pale cinnamon in color; as it ages, the papery scales transition to thicker plates, creating a visible gradient of age. These trees are often seen in lowlands, marshes, and other wet areas though they do not tolerate shade well. In addition to these and its ability to withstand acidic soils, river birch is often used for erosion control especially in mining areas. It is sometimes used in furniture, and Native Americans would also boil its sap to make a sweetener similar to maple syrup.

 

Family: Betulaceae

Foliage: Deciduous

Mature height range: 30-50 ft. though can reach heights of 90 ft. or more

Light exposure: Full Sun to Partial Shade

Soil preference: Moist

Tolerance: Can tolerate flooding conditions and acidic soils, making it well suited for erosion control; tolerates higher temperatures than other birches

Wildlife: nesting by waterfowl, seed-eating by ruffed grouse and wild turkey, browsing by game mammals, larval host plant for over 15 moth species

 

The peeling bark of river birch by Greg Hume – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=46808610

 

River birch leaves and seeds by Googoo85 – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=26477603

 

Mature river birch by Jgwil2 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=89413687