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English oak identification: leaves, bark, fruit and twigs
English oak, Quercus robur, is an introduced tree in Pennsylvania. How to recognize it by its leaves, bark, fruit and twigs, and how to tell it from look-alikes.
Alternate, simple leaves with lobes. Leaves 4 to 6 inches long with 3 to 7 pairs of rounded lobes, tiny ear-lobes at the base and almost no leaf stem. Bark: Gray-brown, deeply furrowed with age. Checked Nov. 14, 2026.
How to identify English oak
| Leaf type | Alternate, simple leaves with lobes |
|---|---|
| Leaves | Leaves 4 to 6 inches long with 3 to 7 pairs of rounded lobes, tiny ear-lobes at the base and almost no leaf stem. |
| Bark | Gray-brown, deeply furrowed with age. |
| Fruit | Narrow acorns 3/4 to 1 inch long on a long stalk, cap covering about a third. |
| Twigs | Smooth yellow-brown twigs. |
| Size and shape | Large tree with a round crown that can pass 100 feet. |
From the Virginia Tech Dendrology fact sheet, in our own words.
Is English oak native to Pennsylvania?
The Pennsylvania Natural Heritage Program (PNHP) lists English oak as introduced: it is not native to Pennsylvania.
See all 140 trees, with a 4-question identifier, in our Pennsylvania tree identification guide.
Trees that look like English oak
| Tree | Its leaves |
|---|---|
| White oak Quercus alba | Alternate, simple leaves with lobes. Leaves 4 to 7 inches long with 7 to 10 rounded, finger-like lobes (no bristle tips), whitish underneath. |
Compare the leaves first, then the bark, fruit and twigs on each tree’s page.
Other oaks in Pennsylvania
Swamp white oak (Quercus bicolor), Scarlet oak (Quercus coccinea), Southern red oak (Quercus falcata), Bear oak (Quercus ilicifolia), Shingle oak (Quercus imbricaria), Blackjack oak (Quercus marilandica), Swamp chestnut oak (Quercus michauxii), Chestnut oak (Quercus montana), Chinkapin oak (Quercus muehlenbergii), Pin oak (Quercus palustris), Willow oak (Quercus phellos), Northern red oak (Quercus rubra), Shumard oak (Quercus shumardii), Post oak (Quercus stellata), Black oak (Quercus velutina), Sawtooth oak (Quercus acutissima).
Questions
How do you identify English oak?
Look for alternate, simple leaves with lobes. Leaves 4 to 6 inches long with 3 to 7 pairs of rounded lobes, tiny ear-lobes at the base and almost no leaf stem. Bark: Gray-brown, deeply furrowed with age.
Is English oak native to Pennsylvania?
The Pennsylvania Natural Heritage Program (PNHP) lists English oak as introduced: it is not native to Pennsylvania.
How big does English oak get?
Large tree with a round crown that can pass 100 feet.
How can you tell English oak in winter?
Check the twigs and bark. Twigs: Smooth yellow-brown twigs. Bark: Gray-brown, deeply furrowed with age.
What tree looks like English oak?
White oak. Compare the leaves first.
Sources: Virginia Tech Dendrology (Quercus robur fact sheet); Pennsylvania Natural Heritage Program, PA Vascular Plant List (native or introduced status). Checked Nov. 14, 2026.
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