Memecylon L.
  • Sp. Pl. 1: 349. 1753. (1 May 1753)


Cite taxon page as 'WFO (2020): Memecylon L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000023703. Accessed on: 21 Oct 2020'

General Information

Shrubs or small trees, often glabrous; branches terete or 4-sided, many-branched. Leaves petiolate or sessile; leaf blade usually leathery, pinnately veined, margin entire. Inflorescences axillary or inserted on leafless stems, cymose or umbellate. Flowers 4-merous. Hypanthium cup-shaped, campanulate, subfunnel-shaped, or semiorbicular, apex repand or shallowly 4-lobed. Petals orbicular, oblong, or ovate, often oblique. Stamens 8, equal, isomorphic; filaments as long as anthers; anthers elliptic, small, longitudinally dehiscent; connective conic, inflated, lengthened, 2-3 × as large as anthers, sometimes abaxially with a circular concave gland. Ovary inferior, subglobose, 1-celled, apex truncate, 8-sulcate, radiated; ovule 6-12, with free central placentation. Fruit a baccate drupe, often globular, apex with hypanthium forming a ring; exocarp usually succulent, 1-seeded. Seed globular, glabrous; seed coat bony; cotyledon crumpled; embryo curved.

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

    Seeds 1 or 2; embryo convolute, exalbuminous; cotyledons thick or foliaceous.

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    Shrubs or trees, usually glabrous, rarely shortly pilose

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    Inflorescence of pseudo-umbellate contracted cymes arranged in a corymbose panicle with series of opposite or fascicled branches, generally reduced to simpler pseudo-umbels, cymes, fascicles or even single flowers; peduncles absent or well developed, either solitary or several from each leaf-axil

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    Leaves opposite, entire, coriaceous to submembranaceous, petiolate or subsessile; midrib always prominent, 2 basal longitudinal nerves either present or absent, when present either as prominent as the midrib or thin and sinuate, transverse veinlets strong to obscure

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    Calyx campanulate to obconical

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    Flowers 4-merous, hermaphrodite (possible exception of M. dioicum (Naud.) Cogn.), usually pedicellate; bracts and bracteoles often present

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    Stamens 8, equal; anthers medifixed, axe-shaped; thecae minute, opening by a slit; connective ending in a thick dorsal appendage as long as the thecae or twice as long and provided with a dorsal sessile hollow gland

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    Petals blue or white

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    Berry spherical, often with a corona formed by the persistent calyx-lobes

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    Ovary wholly adherent to the calyx-tube, 1-locular, apex swollen or depressed and provided with an epigynous disc with 8 radiating ribs that conceal the anthers in bud; ovules 5–20, on a central placenta; style filiform; stigma simple

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    Fruit an ovoid, globose or ellipsoid l(2)-seeded berry, crowned by the persistent calyx.

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    Ovary 1-locular, wholly adherent to the receptacle, sunken or convex at the apex; style filiform; ovules 2–12(20), on a central placenta.

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    Stamens 8, equal, sometimes 4 with abortive anthers; filaments filiform; anthers axe-shaped, with 2 anterior thecae dehiscing by 2 longitudinal slits and usually with a gland on the concave back.

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    Leaves opposite, entire, longitudinally 1–3(5)-nerved, shortly petiolate.

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    Trees or shrubs usually everywhere glabrous, with the young branches narrowly 4-winged, 4-gonous or terete.

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    Petals broadly ovate, obovate, circular-subdeltate, obtuse or apiculate, whitish or bluish.

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    Seeds large; cotyledons crumpled or not so.

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    Receptacle broadly campanulate, hemispherical or cupular, with the limb ± dilated, truncate, 4-toothed or -lobed.

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    Bracts minute.

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    Flowers 4-merous, small or minute, in fascicles or in cymes forming panicle-like or corymbose inflorescences.

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    Included Species

     Information From

    Melastomataceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B
    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
    • 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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • F All Rights Reserved
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • G See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use