The Arecaceae
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Description: Brief description of the genus, with many photographs illustrating botanic features and the economically important plants.
Flowering Plant Families, UH Botany The Arecaceae are woody shrubs, vines, or trees comprising about 200 genera and 3,000 species that are further characterized by having large or very large leaves, each with a tubular sheathing base that typically splits open on one side at maturity. The leaves are alternate, petiolate, and palmately or pinnately cleft to once or twice compound. The inflorescence is usually paniculate and is typically subtended by one or more bracts or spathes that may become woody at maturity. The flowers are actinomorphic, generally small, and are bisexual or more often unisexual. The perianth usually consists of two whorls of 3 distinct or connate segments each, often distinguished primarily by size, the outer series or calyx being the smaller. The androecium consists typically of 6 distinct stamens in two whorls of 3 each but sometimes comprises up to several hundred variously connate or adnate stamens. The gynoecium is syncarpous or apocarpous. Syncarpous forms consist of a single compound pistil of usually 3 carpels, 1 or 3 styles, and a superior ovary with 3 locules, each containing a single basal, axile, or apical ovule. Apocarpous, forms consist of usually 3 simple pistils, each with a superior ovary containing one locule with a single basal to apical ovule. The fruit is usually a drupe.
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| Date | activated: 27-Oct-1986 last updated: 24-May-2011 expires: 31-Jul-2014 |