chestnut oak Fagaceae Quercus prinus L. symbol: QUPR2 Leaf: Alternate, simple, 4 to 6 inches long, obovate to elliptical in shape with a crenate margin, shiny green above and paler below. Flower: Species is monoecious; male flowers are yellow-green, borne in naked catkins, 2 to 4 inches long; female flowers are reddish and appear as single spikes, appearing with the leaves in mid-spring. Fruit: Acorns are 1 to 1 1/2 inches long, ovoid in shape and separate from the cap when mature; cap is thin, warty and shaped like a teacup, edges of cap are very thin; matures in one growing season, ripening in the fall. Twig: Medium textured, lacking hair, orange-brown or grayish in color with chestnut brown multiple terminal buds that are pointed, narrowly conical and quite long. Bark: Gray-brown to brown, very smooth when young; developing hard and wide flat-topped ridges which later become thicker and more sharply pointed ridges; somewhat resembling the back of an alligator or ridge tops. Form: A medium sized tree to 80 feet tall that on better sites will develop a straight trunk and narrow crown; on drier ridge tops it is much smaller with a crooked stem. Looks like: chinkapin oak - swamp white oak - swamp chestnut oak - American chestnut Additional Range Information: Quercus prinus is native to North America. Range may be expanded by planting. See states reporting chestnut oak. External Links: USDAFS Silvics of North America USDAFS Additional Silvics Landowner Factsheet USDA Plants Database Horticulture