1. Family: Picrodendraceae Small
    1. Oldfieldia Benth. & Hook.f.

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

    [FZ]

    Euphorbiaceae, A. Radcliffe-Smith. Flora Zambesiaca 9:4. 1996

    Habit
    Dioecious pachycaul trees or shrubs with a simple indumentum.
    Stem
    Twigs with prominent leaf scars.
    Buds
    Buds perulate (furnished with protective scales).
    Leaves
    Leaves alternate, opposite-decussate or verticillate in whorls of 3, long-petiolate, exstipulate, digitately 3–8-foliolate; leaflets subsessile or petiolulate, entire, penninerved, brochidodromous.
    Inflorescences
    Inflorescences axillary, solitary or geminate, cymose; male inflorescences subsessile or pedunculate, many-flowered, lax or capitate; female inflorescences pedunculate, the peduncles extending in fruit, 1–3-flowered.
    Flowers
    Male flowers small, shortly pedicellate; sepals 5–8, unequal, united at the base, imbricate; petals absent; stamens 4–12, free, filaments inserted between the lobes of the disk, unequal, anthers dorsifixed, extrorse, minutely papillose, longitudinally widely dehiscent; disk central, thick, fleshy, lobate-sinuate, pubescent; pistillode filiform, minute or absent. Female flowers: pedicels very short, lengthening slightly in fruit; sepals longer, narrower and stouter than in the male, but otherwise similar, persistent in fruit; disk hypogynous, annular, short, fleshy, crenellate; ovary 2–3-locular, with 2 ovules per locule; styles 2–3, short, connate at the base; stigmas ± reniform, shallowly 2–4-lobulate, caducous.
    Fruits
    Fruits 2–3-locular, depressedobovoid-subglobose, tardily loculicidally dehiscent into 2–3 valves each with an attached septum; pericarp coriaceous; mesocarp crustaceous; endocarp chartaceous; columella persistent, often with the seeds attached.
    Seeds
    Seeds 1–2 per locule, usually 3 per fruit, somewhat compressed; exotesta fleshy; endotesta crustaceous; funicle thickened, carunculoid; albumen fleshy; embryo green, cotyledons broad, flat.
    [FTEA]

    Euphorbiaceae, A. R.-Smith. Flora of Tropical East Africa. 1987

    Habit
    Dioecious trees or shrubs with simple indumentum
    Twigs
    Twigs cicatricose
    Buds
    Buds perulate
    Leaves
    Leaves alternate, opposite-decussate or verticillate, petiolate, exstipulate, digitate; leaflets subsessile or petiolulate, entire, penninerved
    Inflorescences
    Inflorescences axillary, solitary or geminate, cymose Male inflorescences subsessile or pedunculate, many-flowered, lax or capituliform Female inflorescences pedunculate, the peduncle lengthening in fruit, (1–)2(–3)-flowered
    Male
    Male inflorescences subsessile or pedunculate, many-flowered, lax or capituliform Male flowers small, shortly pedicellate; sepals 5–8, unequal, fused at the base, imbricate; petals 0; stamens 4–12, free, inserted between the lobes of the disc, filaments unequal, anthers dorsifixed, extrorse, minutely papillose, longitudinally widely dehiscent; disc central, thick, fleshy, lobate-sinuate, pubescent; pistillode filiform, minute or 0
    Female
    Female inflorescences pedunculate, the peduncle lengthening in fruit, (1–)2(–3)-flowered Female flowers: pedicels lengthening in fruit; sepals and petals as in the ♂ flowers; disc hypogynous, annular, fleshy, short, crenellate; ovary 2–3-locular, with 2 ovules per locule; styles 2–3, connate at the base, stigmas ± reniform, 2–4-lobulate, caducous
    Flowers
    Male flowers small, shortly pedicellate; sepals 5–8, unequal, fused at the base, imbricate; petals 0; stamens 4–12, free, inserted between the lobes of the disc, filaments unequal, anthers dorsifixed, extrorse, minutely papillose, longitudinally widely dehiscent; disc central, thick, fleshy, lobate-sinuate, pubescent; pistillode filiform, minute or 0 Female flowers: pedicels lengthening in fruit; sepals and petals as in the ♂ flowers; disc hypogynous, annular, fleshy, short, crenellate; ovary 2–3-locular, with 2 ovules per locule; styles 2–3, connate at the base, stigmas ± reniform, 2–4-lobulate, caducous
    Fruits
    Fruit tardily loculicidally dehiscent; valves 2–3, each with a septum attached; pericarp slightly coriaceous; endocarp crustaceous
    Seeds
    Seeds 1–2 per locule, somewhat compressed, with a thickened carunculoid funicle; testa crustaceous; albumen fleshy; embryo green; cotyledons broad, flat.

    Images

    Distribution

    Native to:

    Angola, Cameroon, Central African Repu, Congo, Gabon, Ivory Coast, Kenya, Liberia, Malawi, Mozambique, Sierra Leone, Somalia, Tanzania, Zambia, Zaïre

    Introduced into:

    Benin

    Oldfieldia Benth. & Hook.f. appears in other Kew resources:

    First published in Hooker's J. Bot. Kew Gard. Misc. 2: 184 (1850)

    Accepted by

    • Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of West Tropical Africa
    • Pax & K. Hoffm. in Engl. Pflanzenr. Euph. 15: 297 (1922).
    • —F.T.A. 6, 1: 625
    Flora Zambesiaca
    • J. Léonard in Bull. Jard. Bot. État 26: 338 (1956).
    • Müller Argoviensis in De Candolle, Prodr. 15, 2: 1259 (1866).
    • in Hooker’s J. Bot. Kew Gard. Misc. 2: 184, t. 6 (1850).
    Flora of Tropical East Africa
    • J. Léon. in B.J.B.B. 26: 338 (1956)
    • Pax in E.P. IV. 147(15): 297 (1922)
    • Hutch. in F.T.A. 6(1): 625 (1912)
    • G.P. 3(1): 281 (1880)
    • G.P. 1(3): 999 (1867)
    • Muell. Arg. in DC., Prodr. 15(2): 1259 (1866)
    • in Hook., Journ. Bot. 2: 184, t. 6 (1850)

    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