Quercus macrocarpa
Common name:
Bur Oak
Mossycup Oak
Pronunciation:
KWER-kus ma-kro-CAR-pa
Family:
Fagaceae
Genus:
Type:
Broadleaf
Native to (or naturalized in) Oregon:
No
- Deciduous tree, 70-80 ft (21-24 m) height, similar or greater spread, developing into an oval form with a massive trunk and stout branches. Bark dark gray to gray-brown, becoming deep ridged and furrowed. Leaves alternate, simple, 10-25 cm long, about half as wide, obovate to oblong-obovate, generally cuneate base, shape variable, often with a broadly expanded toothed portion above 2 deep notches and a lower portion with a few short, rounded lobes, other leaves with 7-9 deep lobes (resembling white oak), upper surface glossy green, pale and hairy below. Autumn color yellow-green, yellow, and yellow-brown. Fruit (acorn) solitary, 2-4 cm long, enclosed more than half by a deep cap which is conspicuously fringed.
- Sun, difficult to transplants. Very adaptable to various soil conditions and fairly tolerant of urban conditions.
- Hardy to USDA Zone 3 Native range from Nova Scotia to Pennsylvania, west to Manitoba and Texas.
- macrocarpa: with large fruit
- Corvallis: in the parking strip on the north side of Harrison Ave. west of 14th St.
Click image to enlarge
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expanding leaves and flowers (catkins)
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plant habit
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plant habit
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plant habit
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leaf
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immature fruit and leaves
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leaves and immature fruit
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leaves and fruit
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ripening fruit (acorns), September
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plant habit, fall
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plant habit, fall
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leaves, fall
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mature fruit (acorns)
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plant habit, winter
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trunk, bark
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trunk, giant puffball (Calvatia gigantia) at base
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winter twigs, buds
