Leaves are alternate, simple, lobed. Lobes have pointed tips.
Fruit is an acorn.
The northern pin oak is also called Hills oak, yellow oak, and jack oak. It is similar to the red oak but does not get as large and is heavier branched. The northern pin oak can be found in northeastern Iowa on moist, sandy soils and clay upland. The leaf lobes are bristle tipped, with lobe sinuses reaching almost toleaf mid-vein. The leaves are leathery in texture, dark shiny green above.