Shrubs or trees , to 20(-45) m. Bark gray or brown, smooth or deeply furrowed. Twigs densely yellowish tomentose. Leaf blade adaxially convex, to 60-120 mm, leathery to brittle, margins often revolute, regularly toothed, teeth prominent to obscure; surfaces abaxially prominently and densely woolly, often glabrate at maturity, revealing gray or bluish green waxy surface, veins often distally impressed. Fruits: cup scales subulate, spreading to strongly recurved, hooked; nut yellowish brown, globose to cylindric-tapered, to 15-35 mm, extremely hard, densely tomentose, eventually glabrate.
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