MacDaniels, Laurence H. Formerly, Horticultural Section, School of Integrative Plant Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York.
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A large broad-leafed evergreen tree, Bertholletia excelsa, which grows wild in the forests of the Amazon valley of South America. The fruit of the Brazil nut tree is a spherical capsule, approximately 3–6 in. (7.5–15 cm) in diameter and 2–4 lb (0.9–1.8 kg) in weight. When the fruit is mature, it consists of an outer hard indehiscent husk, about 0.5 in. (1.2 cm) in thickness, enclosing an inner hard-shelled container or pod filled with approximately 20 rather triangular seeds or nuts (see illustration). See also: Lecythidales; Nut crop culture; Seed
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