poinciana poinsēā´nə, –ă´nə [key], any shrub or tree of the tropical and subtropical genus Poinciana of the family Leguminosae ( pulse family). Poincianas are popular ornamentals for their showy orange or scarlet blossoms. The royal poinciana or peacock flower ( P. regia ), native to Madagascar, is one of the most striking of tropical trees. It is widely cultivated elsewhere, e.g., the West Indies, the S United States, and Bermuda. Poincianas are classified in the division Magnoliophyta , class Magnoliopsida, order Rosales, family Leguminosae.

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