The Melastomataceae
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Description: Botanical characteristics of this family with descriptions and photographs of a number of individual species.
Flowering Plant Families, UH Botany The Melastomataceae are herbs, shrubs, or trees comprising about 200 genera and 4,000 species that are further characterized by having the major leaf veins usually 3-9 palmate and running in a parallel fashion from the base of the blade to near the leaf tip. The leaves are opposite and decussate or rarely alternate by abortion of one of the members of a pair; stipules are absent. The flowers are bisexual and actinomorphic to rather zygomorphic, at least with respect to the androecium and style. The perianth is biseriate, arising from a perigynous or epigynous zone. The calyx most commonly consists of 5 valvate sepals but these may be coalesced into a hoodlike calyptra. The corolla commonly has 5 distinct petals. The androecium most often consist of two whorls, each with the stamens equaling the number of petals but rarely has only one whorl or numerous stamens. The stamens may be dimorphic but the functional ones are typically claw-like, commonly with knee-like joints and appendaged anthers that open usually by terminal pores. The gynoecium consists of a single compound pistil of mostly 4-14 carpels, a single style and stigma, and a superior or more commonly inferior ovary mostly with 4-14 locules and very numerous axile ovules. The fruit is a capsule or berry.
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| Date | activated: 27-Oct-1986 last updated: 24-May-2011 expires: 31-Jul-2014 |