Chestnut Oak ( Quercus prinus ) is a common tree of out area and has the same general properties as other species. The acorns are usually quite bitter, but are large. The Iroquois used them for food.
The name refers to the leaf shape, which is reminiscent of Chestnut because of the general shape that has a wavy margin suggesting the curved teeth of the Chestnut rather than the typical deeply lobed shape of an Oak.
Oak can be used as an astringent and tonic for respiratory, skin, and digestive issues. Perhaps this is a good and somewhat unusual representative of a "metal element" remedy, per Chinese 5 Element Theory that has the lungs, large intestine, and skin as primary organ associations.