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Deciduous nut-producing tree (Juglans cinerea) of the walnut family, native to eastern North America. A mature tree has gray, deeply furrowed bark. Each leaf has 11–17 yellowish green leaflets that are hairy underneath. Chocolate-coloured partitions divide the pith of the twig into many chambers. The egg-shaped fruit has a sticky, greenish brown husk. The hard, woody nut bears many ridges and contains a sweet, oily seed. The tree is economically important for its edible nuts and for a yellow or orange dye obtained from the fruit husks. Some substances in the inner bark of the roots are used in medicines.
This entry comes from Encyclopædia Britannica Concise. For the full entry on butternut, visit Britannica.com.