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Compare sources for Quercus lyrata

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Field
Oaks of the World
The Sibley Guide to Trees
Oak Compendium
Common Names
overcup oak, swamp post oak
Overcup Oak, Swamp Post Oak, Swamp White Oak, Water White Oak
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Geographic Range

Southeastern United States, from New Jersey to Texas; 0-200 m ; introduced in Europe in 1786;

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Growth Habit

15-25 m ; crown rounded, with numerous branches; trunk short, often tortuous;

Deciduous, small to medium crooked tree usually under 60’. Closely related to macrocarpa.

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Leaves

10-20 x 4-10 cm; oboval, lyre-shaped; apex pointed or obtuse; base cuneate attenuate; 3-5 pairs of lobes, very shallow near base; dark green, hairless obove; silvery tomentose beneath at first, becoming more or less glabrescent; 5-8 vein pairs; petiole 1 to 2.5 cm long, slender, orangish yellow;

  • 5 1/2”
  • variable shape, often three equal squarish lobes at leaf tip, broad sinuses at midleaf, narrow base
  • underleag whitish when young, becoming green, sometimes hairy

Odd ball Q nigra sprouts are often mistaken for Q lyrata. Mucros are usually visible and the leaf underside will cinch the ID.

Fruits (Acorns)

acorn 2.5-5 cm long, subglobose, minutely puberulent; singly or paired; almost all covered by scaly, subsessile cup; maturing in 1 year; cotyledons distinct;

  • 1”
  • cup enclosing almost entire nut
  • stalk to 1 1/2”
  • flaots on water

note immature acorns of other oaks are enclosed by cup, but much smaller

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Twigs
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gray-brown

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Buds
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small grayish

Small and may have fimbrils like Q macrocarpa. Also point a bit inwards like others in this subsection (Q macrocarpa and Q bicolor).

Hardiness & Habitat

hardy; prefers moist soils; slow-growing;

  • Common in swamp forests, periodically inundated. especially in bottomlannds of lower Mississippi Valley
  • Uncommon in cultivation
  • Zones 5-9
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Additional Information

– A. Camus : n° 277 ; – Sub-genus Quercus, Section Quercus, Subsection Prinoideae; – Hybrids with Q.virginiana (= x comptoniae ), bicolor (= x humidicola ), macrocarpa (= x megaleia ), stellata (= x sterrettii) , michauxii (= x tottenii) ;

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