Quercus macrocarpa Michx.  
Family: Fagaceae
bur oak
[Quercus macrocarpa f. olivaeformis Michx., Quercus macrocarpa subsp. olivaeformis Michx., Quercus macrocarpa var. depressa Michx., Quercus macrocarpa var. olivaeformis Michx., Quercus mandanensis Rydb., Quercus obtusiloba var. depressa Michx., Quercus olivaeformis F.Michx.]
Quercus macrocarpa image
Christopher Noll  
Etymology: Quercus: Latin for oak
Plants: perennial, deciduous tree to 98' + tall; dark gray brown, flat-ridged or scaly bark often with corky wings
Leaves: obovate to narrowly elliptic in outline, often fiddle-shaped, bases rounded to pointed, edges lobed and/or toothed with deepest lobes near the base, rounded tip becoming merely toothed, upper side dark dull green, underside light green to whitish
Flowers: smooth buds; blooms in spring
Fruits: 1-3 acorns on stout stalks; semi-circular to turban-like cup covering 1/2-7/8 of the nut; light brown to grayish, oval to oblong nut
Habitat: moist to wet; bottomlands, prairies, savannas; usually on limestone or calcareous clays
Conservation Status: Native
Quercus macrocarpa image
Matthew L. Wagner  
Quercus macrocarpa image
Merel R. Black  
Quercus macrocarpa image
Paul Drobot  
Quercus macrocarpa image
Robert W. Freckmann  
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