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Genus CASTANEA, Adans. — Part 1
B. Trees large; leaves smooth and green on both sides; nuts 2 to 3 in 4-valved, spiny bur.
(C. dentata) CHESTNUT
BB. Trees shrubby, leaves pale and pubescent beneath; nuts solitary in 2-valved bur. (C. pumila) CHINQUAPIN
AA. Leaves evergreen; fruit biennial.