The "Guanacaste" (Enterolobium cyclocarpum), a native tree to Costa Rica, was designated the National Tree on August 31, 1959. It belongs to the leguminous family and the subfamily of the Mimosas. It is found along the coasts of Central America as well as Cuba and in the lowlands of the Antilles.      The "Guanacaste" grows on lands at sea level and up to 900 m. (2,952 ft.) Its height varies from 25 m. (82 ft.) to 50 m. (164 ft.) high. The diameter of its trunk is usually 2 m (6.6 ft.). It grows fast in low and sunny lands, especially in Guanacaste. It has a robust trunk and a beautiful appearance.      "Guanacaste" means "ear tree" since its compressed and curled leaves look like ears. During March and April, the "vainas", its fruit, turn dark brown as it ripens and then falls. Its fruit generally carries between 10 and 22 seeds. Its flower is white and rounded.