Robert W. Freckmann Herbarium


  Quercus macrocarpa Michx. image
Photographer: Michael Clayton           

Botanical Illustration

Botanical Illustration

Kenneth J. Sytsma

Matthew L. Wagner

Matthew L. Wagner

Merel R. Black

Merel R. Black

Christopher Noll

Christopher Noll

Christopher Noll

Paul Drobot

Paul Drobot

Paul Drobot

Paul Drobot

Robert R. Kowal

Robert W. Freckmann

Robert W. Freckmann

Janice Stiefel
Family Fagaceae
Quercus macrocarpa Michx.
bur oak
Quercus: Latin for oak
macrocarpa: macros for "large;" carpon for "fruit"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
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Status: Native
Plant: perennial, deciduous tree to 98' + tall; dark gray brown, flat-ridged or scaly bark often with corky wings
Flower: smooth buds; blooms in spring
Fruit: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
Leaf: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
Habitat: moist to wet; bottomlands, prairies, savannas; usually on limestone or calcareous clays
(Glossary)

More Information Natural Communities Herbarium Specimens
All Quercus list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
Synonyms 
Quercus macrocarpa Michx. f. olivaeformis (F.Michx.) Trel.
Quercus macrocarpa Michx. subsp. olivaeformis (F.Michx.) A.Camus
Quercus macrocarpa Michx. var. depressa (Nutt.) Engelm.
Quercus macrocarpa Michx. var. macrocarpa
Quercus macrocarpa Michx. var. olivaeformis (F.Michx.) A.Gray
Quercus mandanensis Rydb.
Quercus obtusiloba Michx. var. depressa Nutt.
Quercus olivaeformis F.Michx.

         
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