1. Family: Rosaceae Juss.
    1. Hagenia J.F.Gmel.

      1. This genus is accepted, and is native to Africa..

    [FZ]

    Rosaceae, E. J. Mendes. Flora Zambesiaca 4. 1978

    Habit
    Dioecious or polygamo-dioecious tree; branchlets ringed by the scars of the fallen leaf-bases.
    Leaves
    Leaves imparipinnate, crowded; stipules large, adnate to the base of the petiole, sheathing the branchlets.
    Inflorescences
    Panicles large, terminal, drooping.
    Flowers
    Flowers with 2–3 bracts embracing the base of the calyx-tube; calyx-tube with (4)5 “epicalyx ” -lobes alternating with and inserted below the (4)5 calyx-lobes; calyx-lobes in male flowers larger than the epicalyx, in female and hermaphrodite flowers smaller than the epicalyx; petals (4)5, alternating with the calyx-lobes, or 0; stamens up to 20, inserted on the annular hairy disk lining the mouth of the calyx-tube; carpels (1)2, free within the receptacle; styles (1)2, terminal; stigmas asymmetrically discoid; ovule single, pendulous.
    Fruits
    Achenes with fragile pericarp.
    [FTEA]

    Rosaceae, R. A. Graham. Flora of Tropical East Africa. 1960

    Habit
    Dioecious or polygamous tree
    Leaves
    Leaves imparipinnate
    Flowers
    Flowers small, anemophilous, aggregated into large many-flowered panicles Male flowers with the outer calyx-lobes smaller than the inner, the receptacle not accrescent, the ovaries aborting; stamens 12–20 Female flowers with the outer calyx-lobes and receptacle accrescent, the outer lobes much larger than the inner and serving ultimately to parachute the ripe fruit by rotation; stamens with very short filaments and abortive anthers; styles 2; carpels 2, free within the receptacle; ovule single, pendant Hermaphrodite flowers apparently rare, similar to ♀ flowers but having (at least some) fertile anthers
    Corolla
    Petals 0 or rudimentary
    Calyx
    Calyx adnate to the receptacle, apically produced into (4–)5 lobes (“bracteoles”)
    Receptacle
    Receptacle closed at the throat, terminating in (4–)5 (inner) lobes which usually alternate with the calyx-lobes: thus each flower bears an “inner” and an “outer” row of calyx-lobes, all membranous
    Male
    Male flowers with the outer calyx-lobes smaller than the inner, the receptacle not accrescent, the ovaries aborting; stamens 12–20
    Female
    Female flowers with the outer calyx-lobes and receptacle accrescent, the outer lobes much larger than the inner and serving ultimately to parachute the ripe fruit by rotation; stamens with very short filaments and abortive anthers; styles 2; carpels 2, free within the receptacle; ovule single, pendant
    Hermaphrodite
    Hermaphrodite flowers apparently rare, similar to ♀ flowers but having (at least some) fertile anthers
    Fruits
    Achenes brown, (often only 1 developing), reticulately rugose, ± ovoid with a thin, fragile pericarp.

    Images

    Distribution

    Native to:

    Burundi, Eritrea, Ethiopia, Kenya, Malawi, Rwanda, Sudan, Tanzania, Uganda, Zambia, Zaïre

    Hagenia J.F.Gmel. appears in other Kew resources:

    First published in Syst. Nat. ed. 13[bis]: 613 (1791)

    Literature

    Flora Zambesiaca
    • Syst. Nat. ed. 13, 2: 600, 613 (1791).
    Flora of Tropical East Africa
    • Syst. 2: 613 (1791)

    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 2020. 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 2020. 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