Virtues: Excellent large shade tree. Adaptable and drought tolerant. Unique-looking acorns. Super cold hardy.
Foliage: Large dark green leaves are typically 6 to 12 inches long. Typical oak-leaf shape, but with rounded edges. Turns yellowish brown in fall.
Fruit: Large oval acorns appear in the fall. Their caps are very large, sometimes covering three-quarters of the nut, and covered with a tan, mossy-textrued coat, or bur.
Habit: Deciduous tree, 60 to 80 feet tall with a 60 to 80 foot canopy. The canopy has a nicely rounded shape.
Season: Spring through fall as a shade tree.
Origin: Prairies, woods and stream edges of the central US and Canada.
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Top image public domain
Bottom image courtesy of Missouri Botanical Garden PlantFinder