1. Family: Rhamnaceae Juss.
    1. Jaffrea H.C.Hopkins & Pillon

      1. This genus is accepted, and its native range is New Caledonia.

    [KBu]

    Hopkins, H.C.F., Pillon, Y., Stacy, E.A. et al. 2015. Jaffrea, a new genus of Rhamnaceae endemic to New Caledonia, with notes on Alphitonia and Emmenosperma. Kew Bulletin 70: 42. DOI https://doi.org/10.1007/s12225-015-9593-6

    Type
    Type: Jaffrea xerocarpa (Baill.) H. C. Hopkins & Pillon = Alphitonia xerocarpa Baill.
    Habit
    Trees or shrubs, without spines
    Indumentum
    Indumentum when present, of simple, straight to curved hairs
    Stipules
    Stipules small, triangular, free, with scabrid margins, fugaceous
    Leaves
    Leaves simple, alternate, entire; secondary venation pinnate, higher order venation reticulate or obscure
    Inflorescences
    Inflorescence thyrsoid, subsiduary units pseudo-umbellate, the flowers tending to be in fascicles
    Flowers
    Flowers bisexual, with a conical hypanthium, the sepals, petals and stamens borne around its rim; sepals 5, triangular, each with a keel along the midline on the upper surface; petals 5, cucullate, each enclosing an anther, incurved to ± erect at anthesis, shorter than sepals; stamens 5; filaments subequal to petals, ± erect at anthesis; disc a series of lumps or a ± continuous ring attached to the wall of the hypanthium but not entirely filling its mouth; ovary semi-inferior at anthesis, locules 3 (4), each containing a single erect ovule; style conical, thick, stigma 3 (4)-lobed
    Fruits
    Fruits woody, ellipsoid and beaked, with an annular scar close to the base, apparently tardily dehiscent; the part proximal to the scar somewhat thickened, resembling a cupule; exocarp dark at maturity; mesocarp thin or absent; endocarpids crustaceous, dehiscing initially from the apex then falling to reveal 3 erect seeds that sometimes persist on the base of the fruit
    Seeds
    Seeds ellipsoid, ± dorso-ventrally flattened, exarillate; testa hard, shiny, orange, sometimes minutely pitted; presence of endosperm unknown.
    Distribution
    A genus of two species, both endemic to New Caledonia.
    Note

    Named in honour of Tanguy Jaffré, who has worked extensively on the flora New Caledonia and especially on its ecology, and who was formerly head of the herbarium (NOU) at the Institut de Recherche pour le Développement (IRD), previously the Office de la Recherche Scientifique et Technique d'Outre-Mer (ORSTOM), in Nouméa. His collections include: Jaffré 848, 1333 and 3054 (Jaffrea xerocarpa) and Jaffré 1025 (J. erubescens).

    Differs from Emmenosperma s.s. by its flowers, in which the hypanthium is narrowly conical (vs cup-shaped in Emmenosperma s.s.) and the disc is thick, comprising a series of lumps or a ± continuous ring around the gynoecium (vs disc thin, lining the hypanthium in Emmenosperma s.s.) and by its fruits, which are ellipsoid and markedly beaked with a thickened, cone-shaped cupule below the ring-scar (vs fruits globose or 3-lobed with a small apiculum, bulging below the ring-scar in Emmenosperma s.s.).

    Distribution

    Native to:

    New Caledonia

    Jaffrea H.C.Hopkins & Pillon appears in other Kew resources:

    First published in Kew Bull. 70(4)-42: 15 (2015)

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    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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