Uvariastrum Engl. & Diels
  • Monogr. Afrik. Pflanzen-Fam. 6: 5, 31. 1901.


Cite taxon page as 'WFO (2020): Uvariastrum Engl. & Diels. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000039911. Accessed on: 27 Feb 2020'

Morphology

Shrubs or small trees, glabrous or with an indumentum of simple hairs (or also stellate in U. modestum Diels)

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    Carpels 3–15 (or more), cylindric or obconic, sometimes angular, free, with numerous biseriate ovules; style very short; stigma broadened, bilobed or irregular, rugose or verrucose

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    Monocarps indehiscent, ellipsoid or cylindric, stipitate, few–many-seeded, somewhat constricted between the seeds, usually succulent

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    Seeds ± horizontal, without an aril.

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    Sepals 3, valvate, free, enclosing the petals in bud, at which time the margins form wing-like ridges (see below), often densely ferruginous pubescent

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    Flowers hermaphrodite or rarely unisexual, axillary, solitary or paired, sometimes borne on the old wood; buds conical; bracteole 1, usually deciduous

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    Stamens numerous, linear, the cells lateral or extrorse; prolongation of the connective ± capitate; filaments very short

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    Petals 6, in 2 whorls of 3, usually both valvate but with inner whorl imbricate in one species, free, subequal

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    Ripe carpels indehiscent, succulent (? or sometimes dry), ellipsoid to cylindric, shortly stipitate, many- to few-seeded.

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    Seeds ± horizontal; aril absent.

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    Sepals 3, valvate, free, enclosing the petals and with the margins folded to form three ± prominent longitudinal wings in bud, often densely brown-pubescent.

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    Petals 6, in two whorls, both valvate (or the inner one imbricate in U. hexaloboides (R.E.Fr.) R.E.Fr.), expanding and spreading at anthesis, free, subequal (the outer whorl usually slightly longer).

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    Stamens ?, linear, with thecae extrorse and connective-prolongations ± capitate.

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    Carpels 3–10 or sometimes more numerous, free, cylindric or obconic, sometimes ± angular, with numerous ovules in two rows; style very short or absent; stigma ± expanded, bilobed or irregular.

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    Shrubs or trees, not climbing, glabrous or with simple hairs (and also stellate hairs in U. modestum Diels).

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    Buds conic.

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    Flowers bisexual (rarely unisexual), solitary or paired, axillary, sometimes on the old wood.

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    Bracteole 1, usually caducous.

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     Information From

    Annonaceae
    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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).