White oak group and red oak group: what the sources say about the split
What the University of Missouri Extension, the USDA Forest Service Wood Handbook, the New York Department of Environmental Conservation and Forest Research say about the two oak groups: leaves, bark, acorns, wood, the species each source puts in each group and why oak wilt treats the groups differently.
Checked against the sources at the bottom of this page on October 9, 2026. Rules, fees and pay change: the source has the last word.
This page reports what the named sources say. It does not identify any tree from a description or photo. Each fact names its source, all read on October 9, 2026. The page compares groups of oak; a profile of each species named is linked where this site has one.
The split in one table
| Point | White oak group | Red oak group |
|---|---|---|
| Leaves | Rounded lobes (University of Missouri Extension; New York DEC says rounded leaf tips) | Bristle-tipped lobes (University of Missouri Extension; New York DEC says pointed leaf tips). Missouri lists shingle oak among the red oaks. |
| Bark | Grayish and usually scaly (University of Missouri Extension) | Typically dark and furrowed (University of Missouri Extension) |
| Acorns | Mature at the end of the first growing season, somewhat sweeter, caps knobby outside and smooth underneath (University of Missouri Extension) | Take two years to mature and are bitter tasting, inner shell coated with hairs, cap scales usually thin (University of Missouri Extension) |
| Wood: pores | Heartwood pores are usually plugged with tyloses, so the wood tends to be impenetrable to liquids (Wood Handbook) | Generally lacks tyloses in the pores; the open pores make it unsuitable for tight cooperage unless barrels are lined (Wood Handbook) |
| Wood: other | Somewhat heavier than red oak, heartwood has good decay resistance (Wood Handbook) | Heavy, fairly high shrinkage on drying; heartwood brown with a tinge of red (Wood Handbook) |
Which species the Wood Handbook puts in each group
The USDA Forest Service Wood Handbook (FPL-GTR-282) lists the principal white oak group species as white, chestnut, post, overcup, swamp chestnut, bur, chinkapin and swamp white oak. This site has profiles for white oak, chestnut oak, post oak, overcup oak, swamp chestnut oak, bur oak and swamp white oak.
The Wood Handbook lists the principal red oak group species as northern red, scarlet, Shumard, pin, Nuttall, black, southern red, cherrybark, water, laurel and willow oak. Profiles here cover northern red oak, scarlet oak, pin oak, black oak, southern red oak, water oak, laurel oak and willow oak. The Wood Handbook says sawn red oak lumber cannot be separated by species on wood characteristics alone, and that the red group can be told from white oak by the size and arrangement of pores in the latewood and generally by the lack of tyloses. It lists live oak under a separate tropical oak group, covered by the live oak page.
For the United Kingdom, Forest Research says sessile and pedunculate oak are members of the white oak group, and the profiles are on the sessile oak and pedunculate oak pages.
Why oak wilt treats the groups differently
The New York Department of Environmental Conservation says all oaks are susceptible to the oak wilt fungus, but trees in the red oak group often die much faster than those in the white oak group. It says red oaks such as northern red, scarlet, pin and black oak may die in anything from a few weeks to six months, with fast spread between trees, while in white oaks only a few branches show symptoms in a given year and the disease advances slowly across several years. Forest Research says all 58 North American native oak species are susceptible to some degree, that red oaks are the most susceptible and can die within months, and that some North American white oaks shake off the infection or take many years to die. It adds that it cannot presume that British white oaks share that ability. The full disease profile is on the oak wilt page, and the register of other oak problems is on the oak register.
What the sources say about uses
The Wood Handbook says high-quality white oak is especially sought for tight cooperage, that heartwood is often specified for ship planking because of its decay resistance, and that red oaks are primarily cut into lumber, crossties, mine timbers, fence posts, veneer, pulpwood and fuelwood, with ties, timbers and posts needing preservative treatment for satisfactory service.
Sources
- University of Missouri Extension, Quail-Friendly Plants of the Midwest (MP903), oaks page, reviewed March 2022, read October 9, 2026
- USDA Forest Service, Forest Products Laboratory, Wood Handbook (FPL-GTR-282), 2021, chapter 2, read October 9, 2026
- New York State Department of Environmental Conservation, oak wilt page, read October 9, 2026
- Forest Research, oak wilt (Ceratocystis fagacearum) page, read October 9, 2026