Melastomataceae Juss.
  • Gen. Pl. 328. 1789. (4 Aug 1789)


Cite taxon page as 'WFO (2022): Melastomataceae Juss. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000372. Accessed on: 07 Aug 2022'

General Information

Herbs, shrubs, or trees (to 20 m tall), erect, climbing, or rarely epiphytic. Stipules lacking. Leaves simple, commonly opposite and decussate with one of a pair slightly smaller than other, rarely verticillate or alternate by abortion of one of a pair, usually 1-4(or 5) secondary veins on each side of midvein, originating at or near base and anastomosing apically, tertiary veins numerous, parallel, and connecting secondary veins and midvein but in Memecylon secondary veins pinnate and tertiary veins reticulate. Inflorescences cymose, umbellate, corymbose, in paniculate clusters, or a cincinnus, rarely flowers single, fascicled, or born on a spike; bracts sometimes conspicuous and persistent. Flowers bisexual, actinomorphic but androecium often slightly zygomorphic, usually (3 or)4- or 5(or 6)-merous, perianth biseriate, perigynous; bracteoles opposite, usually caducous. Hypanthium funnel-shaped, campanulate, cyathiform, or urceolate. Calyx lobes (3-)5(or 6), valvate (rarely connate, but not in Chinese species). Petals (3-)5(or 6), equal to number of sepals, distinct, imbricate. Stamens usually twice as many as petals and in 2 whorls, rarely as many as petals by loss of 1 whorl, isomorphic or dimorphic; filaments distinct, often geniculate, inflexed in bud; anthers typically 2-celled, introrse, basifixed, dehiscent by 1 or 2 apical pores or by short longitudinal slits (Astronia, Memecylon); connective often variously appendaged. Pistil and style 1; stigma minute, capitate or truncate. Ovary commonly inferior or semi-inferior, locules usually (3 or)4 or 5(or 6) with numerous anatropous ovules, rarely 1-loculed and ovules ca. 9 (Memecylon); placentation axillary, parietal (Astronia and, outside China, Pternandra Jack), or free central (Memecylon). Fruit a dry or fleshy capsule or a berry, loculicidally dehiscent or indehiscent. Seeds (when 3-6-loculed) usually small, curved through half a circle (cochleate) or wedge-shaped (cuneate), in Memecylon seeds large and ovoid; endosperm absent.

  • Provided by: [C].Flora of China @ efloras.org
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    Fls commonly showy, mostly perfect, partly or wholly epigynous (or strongly perigynous with the hypanthium enveloping but free from the ovary), mostly 4–5-merous, regular except for the stamens; sep valvate; pet convolute, distinct; stamens usually twice as many as the pet; filaments generally inflexed in bud (each anther sometimes occupying a cavity between the hypanthium and the ovary), commonly twisted at anthesis so as to bring all the anthers to one side of the fl; anthers mostly opening by terminal pores; connective commonly provided with one or more appendages of diverse form; nectaries mostly wanting; ovary mostly 3–5-locular, with a terminal style and capitate or punctate stigma; ovules ± numerous, mostly axile; fr a loculicidal capsule or a berry; embryo with 2 commonly unequal cotyledons; endosperm wanting; lvs simple, usually opposite and entire, mostly exstipulate, commonly with 3–9 prominent veins, the lateral ones arching and subparallel. 200/4000, mostly of warm reg., esp. S. Amer.

  • Provided by: [E].Manual of Vascular Plants of Northeastern US and Canada
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    • 5
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    Morphology

    Seeds minute, without endosperm

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Calyx tubular, free or adnate to the ovary, or sometimes connected to it by septa-like strands; lobes imbricate or rarely valvate

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Petals imbricate, free, rarely united at the base

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Leaves simple, opposite or verticillate, mostly with 3 to 9 longitudinally parallel nerves; stipules 0

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Flowers hermaphrodite, mostly very showy, actinomorphic

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Ovary mostly inferior, 1- to many-celled; style simple; ovules numerous, axile, or rarely basal or parietal

  • Provided by: [B].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
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    Fruit a capsule or berry

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Corona sometimes present

  • Provided by: [B].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
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    Stamens the same to double the number of the petals; filaments free, often geniculate, inflexed; anthers 2-celled, opening by a pore at the apex or rarely by a slit (Memecylon), connective often appendaged at the base

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Herbs, shrubs or trees; branches opposite

  • Provided by: [B].Plants Of the World Online Portal - FWTA
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    • 1
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    Trees, shrubs or more commonly herbs, rarely climbers, sometimes epiphytes

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    Leaves opposite and decussate, rarely verticillate, sometimes anisophyllous, simple to entire, serrate, exstipulate, usually with a distinctive nervation of 2–8 strong basal nerves ± parallel to the midrib, rarely pinnately nerved

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    • 2
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    Ovary 1-locular with basal placentation >i>(Memecylon) to several-locular with axile placentation; ovules usually numerous; style and stigma 1

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    Stamens perigynous or epigynous, as many as the petals or more usually twice as many as the petals and in 2 whorls, the whorls equal to very unequal; anthers usually 2-thecous, introrse, basifixed, each anther dehiscing by a single pore or more rarely by a slit (Memecylon); anther-connectives often elongated and often either tubercled or spurred at the junction with the filament; filaments often geniculate, inflexed in bud, sometimes twisted

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    Seeds small or minute, without endosperm and with a very small embryo; one cotyledon larger than the other

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    Fruit a loculicidal capsule or a berry

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 2
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    Flowers hermaphrodite, regular (androecium sometimes slightly zygomorphic), mostly 4–5(–6)-merous

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    • 2
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    Inflorescences various, sometimes bracteate

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 2
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    Petals 4–5, free or rarely united at the base, imbricate or convolute, often magenta coloured

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 2
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    Calyx tubular or campanulate, free or partially adnate to the ovary or sometimes connected to it by septa-like strands (no distinction is made here between the hypanthium and calyx proper); lobes valvate or connate and forming a calyptra-like head in bud, deciduous or persistent; various appendages may alternate with or arise from the calyx-lobes

  • Provided by: [D].Plants Of the World Online Portal - FTEA
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    • 2
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    Seeds minute, cochleate, cuneiform, pyramidal or cylindrical in the many-seeded genera and globose or hemispherical in the few-seeded ones; embryo subcylindric or sub-globose, without endosperm

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Flowers actinomorphic or zygomorphic as regards the stamens, bisexual, (3)4–5(6)-merous

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Flowers in cymes, arranged in heads, fascicles or in ± ample panicles, rarely flowers solitary

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
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    Leaves opposite or sometimes verticillate, longitudinally (1)3–5–7(1 l)-nerved, rarely penninerved, simple, without stipules

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
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    Perennial or annual erect or prostrate terrestrial or epiphytic herbs, lianes, shrubs or trees, with a variable indumentum or glabrous

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Stamens epigynous, rarely perigynous, twice as many or rarely as many as the petals; filaments free, inflected in the bud; anthers basifixed, 2-locular, dehiscing by 1 apical pore (rarely by 2 and very rarely by 4) or by 2 longitudinal slits; connective produced or not at the base and provided anteriorly and/or posteriorly with appendages of several types

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Petals as many as the sepals, inserted on the margin of the receptacle, very rarely connate at the base, imbricate or contorted

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Sepals imbricate or rarely subvalvate, caducous or persistent, rarely 0; intersepalar segments sometimes present

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Receptacle free or adherent to the ovary by longitudinal ridges or ± adnate to it

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
    • ]. 

    Ovary 2-¥-locular or 1-locular by suppression of the dissepiments (Memecylon), glabrous, setose or with scales at the apex; style 1, terminal, straight or curved with a dot-like or subcapitate stigma; ovules anatropous

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
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    Fruit a many-seeded capsule, sometimes baccate, included in the receptacle, rarely semiexserted, opening by loculicidal valves, rarely dehiscing irregularly, or a berry, 1-few-seeded

  • Provided by: [A].Flora Zambesiaca - descriptions
    • Source: [
    • 3
    • ]. 

    Included Genus

     Information From

    Flora Zambesiaca - descriptions
    Flora Zambesiaca
    • A
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B The Trustees of the Royal Botanic Gardens, Kew
    Flora of China @ efloras.org
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • D
    Manual of Vascular Plants of Northeastern US and Canada
    https://www.nybg.org/
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • E Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Melastomataceae
    http://worldfloraonline.org/organisation/Melastomataceae
    Melastomataceae. World Flora Online Data. 2022.
    • F CC0 1.0 Universal (CC0 1.0).
    World Flora Online Consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2017.
    • G CC0 1.0 Universal (CC0 1.0).