1. Family: Annonaceae Juss.
    1. Uvariastrum Engl.

      1. This genus is accepted, and its native range is Tropical Africa.

    [FTEA]

    Annonaceae, B. Verdcourt. Flora of Tropical East Africa. 1971

    Habit
    Shrubs or small trees, glabrous or with an indumentum of simple hairs (or also stellate in U. modestum Diels)
    Flowers
    Flowers hermaphrodite or rarely unisexual, axillary, solitary or paired, sometimes borne on the old wood; buds conical; bracteole 1, usually deciduous
    Calyx
    Sepals 3, valvate, free, enclosing the petals in bud, at which time the margins form wing-like ridges (see below), often densely ferruginous pubescent
    Corolla
    Petals 6, in 2 whorls of 3, usually both valvate but with inner whorl imbricate in one species, free, subequal
    Stamens
    Stamens numerous, linear, the cells lateral or extrorse; prolongation of the connective ± capitate; filaments very short
    Carpels
    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
    Fruits
    Monocarps indehiscent, ellipsoid or cylindric, stipitate, few–many-seeded, somewhat constricted between the seeds, usually succulent
    Seeds
    Seeds ± horizontal, without an aril.
    [FZ]

    Annonaceae, N. K. B. Robson. Flora Zambesiaca 1:1. 1960

    Habit
    Shrubs or trees, not climbing, glabrous or with simple hairs (and also stellate hairs in U. modestum Diels).
    Buds
    Buds conic.
    Flowers
    Flowers bisexual (rarely unisexual), solitary or paired, axillary, sometimes on the old wood.
    Bracts
    Bracteole 1, usually caducous.
    Calyx
    Sepals 3, valvate, free, enclosing the petals and with the margins folded to form three ± prominent longitudinal wings in bud, often densely brown-pubescent.
    Corolla
    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).
    Stamens
    Stamens ?, linear, with thecae extrorse and connective-prolongations ± capitate.
    Carpels
    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.
    Fruits
    Ripe carpels indehiscent, succulent (? or sometimes dry), ellipsoid to cylindric, shortly stipitate, many- to few-seeded.
    Seeds
    Seeds ± horizontal; aril absent.

    Images

    Distribution

    Native to:

    Cameroon, Central African Repu, Congo, Equatorial Guinea, Gabon, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Tanzania, Zambia, Zaïre

    Uvariastrum Engl. appears in other Kew resources:

    First published in Monogr. Afrik. Pflanzen-Fam. 6: 31 (1901)

    Accepted by

    • Couvreur, T.L.P. (2014). Revision of the African genus Uvariastrum (Annonaceae) PhytoKeys 33: 1-40.

    Literature

    Flora of West Tropical Africa
    • Sprague & Hutch, in Kew Bull. 1916: 159.
    • —Engl. & Diels Monogr. Afr. Annonac 31 (1901)
    Flora Zambesiaca
    • in Engl., Mon. Afr. Pflanz. 6: 31 (1901).
    Flora of Tropical East Africa
    • E.M. 6: 31, t. 10/B (1901)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0