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


Cite taxon page as 'WFO (2019): Melastomataceae Juss. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000372. Accessed on: 09 Dec 2019'

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: [D].Flora Of CHina @ efloras.org
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    Morphology

    Seeds minute, without endosperm

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

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    Petals imbricate, free, rarely united at the base

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    Leaves simple, opposite or verticillate, mostly with 3 to 9 longitudinally parallel nerves; stipules 0

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    Flowers hermaphrodite, mostly very showy, actinomorphic

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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
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    Fruit a capsule or berry

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    Corona sometimes present

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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: [C].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: [C].Plants Of the World Online Portal - FTEA
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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

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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: [C].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: [C].Plants Of the World Online Portal - FTEA
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    Fruit a loculicidal capsule or a berry

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

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

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

  • Provided by: [C].Plants Of the World Online Portal - FTEA
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    • 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: [C].Plants Of the World Online Portal - FTEA
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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

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    Flowers actinomorphic or zygomorphic as regards the stamens, bisexual, (3)4–5(6)-merous

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    Flowers in cymes, arranged in heads, fascicles or in ± ample panicles, rarely flowers solitary

  • Provided by: [A].Plants Of the World Online Portal - FZ
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    Leaves opposite or sometimes verticillate, longitudinally (1)3–5–7(1 l)-nerved, rarely penninerved, simple, without stipules

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    Perennial or annual erect or prostrate terrestrial or epiphytic herbs, lianes, shrubs or trees, with a variable indumentum or glabrous

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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

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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

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    Sepals imbricate or rarely subvalvate, caducous or persistent, rarely 0; intersepalar segments sometimes present

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    Receptacle free or adherent to the ovary by longitudinal ridges or ± adnate to it

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    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].Plants Of the World Online Portal - FZ
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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].Plants Of the World Online Portal - FZ
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    Included Genus

     Information From

    Plants Of the World Online Portal - FZ
    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
    • 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
    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
    • C
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    '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.
    • D Missouri Botanical Garden
    Melastomataceae
    World Flora Online Data. 2017.
    • E CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).