Quercus bicolor

Swamp White Oak

Fagaceae

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Habitat

  • native to eastern United States
  • hardy to zone 4

Habit and Form

  • a medium-sized, deciduous tree
  • upright oval crown, open
  • 50 to 60' tall
  • 50' to 60' wide
  • coarse texture
  • moderate growth rate

Summer Foliage

  • alternate leaf arrangement
  • simple, deciduous leaves
  • obovate leaf shape
  • 4" to 8" long
  • 2" to 4
    " wide
  • lobed, rounded
  • white hairs on leaf underside
  • dark green leaf color

Autumn Foliage

  • copper to red fall color

Flowers

  • monoecious
  • male flowers are pendulous yellow-green catkins
  • blooms in May
  • messy

Fruit

  • rounded acorn
  • 0.5' to 1" across
  • usually found in pairs
  • long peduncle
  • involucre covers a third of acorn
  • attracts wildlife

Bark

  • lower branches droop
  • yellowish brown stems
  • deeply furrowed and ridged bark
  • flaky
  • dark brown bark color

Culture

  • part shade to full sun
  • likes swampy situations
  • prefers acidic soil
  • transplant from container
  • drought tolerant

Landscape Use

  • shade tree
  • lawn tree
  • specimen
  • park tree
  • for large area

Liabilities

  • borers oak slug
  • caterpillars
  • variable oak caterpillars
  • gypsy moth
  • anthracnose
  • canker
  • powdery mildew

ID Features

  • leaves with rounded lobes
  • imbricate, ovate, chestnut brown, 0.25" long buds that are pubescent
  • dark brown, flaky bark
  • acorns usually found in pairs

Propagation

  • by seed

Cultivars/Varieties

'Asjes' (Rosehill®) - This plant is most likely a hybrid with Q. robur (English oak), which it strongly resembles. It is resistant to leaf ailments such as mildew and features a somewhat fastigiate, upright form with lustrous green foliage. The acorns resemble those of English oak.

'Long' (Regal Prince®, a selection of Quercus x warei) - This new selection is the result of a cross with a fastigiate English oak (Quercus robur 'Fastigiata). It is a vigorous upright-oval grower reaching 60' tall and only 25' wide. The foliage is handsome all season with a silvery lower surface. Due to its parentage, this plant is tolerant of a wide range of conditions, including both wet and dry soil.

© Copyright Mark H. Brand, 1997-2015.

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Citation and Acknowledgements: University of Connecticut Plant Database, http://hort.uconn.edu/plants, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.