Zanoni, Thomas A. Jardín Botánico Nacional, Santo Domingo, Dominican Republic; New York Botanical Garden, New York, New York.
Last reviewed:December 2019
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An order of the class Cycadopsida of the division Pinophyta (gymnosperms) consisting of four families, Cycadaceae, Stangeriaceae, Zamiaceae and Boweniaceae, with perhaps 100 species. The order dates from the upper Carboniferous and has few living representatives. The cycads were distributed worldwide in the Mesozoic, but today are restricted to subtropical and tropical regions, with the plants occurring in small colonies; few have broad distributions.
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