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  1. Family: Euphorbiaceae Juss.
    1. Genus: Croton L.
      1. Croton polytrichus Pax

        This species is accepted, and its native range is South Sudan to Zambia.

    [FTEA]

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

    Habit
    A monoecious, sometimes semi-scandent shrub or small tree up to 7.5 m. tall, but more usually 3–5 m. tall.
    Shoots
    Young shoots densely fulvous to ferruginous stellate-tomentose, in the following season becoming quite glabrous and pale grey or grey-brown.
    Leaves
    Petioles 1–4 cm. long, ferruginous to grey velvety-tomentose; leaf-blade ovate, ovate-lanceolate, oblong-ovate or oblong-elliptic, or in the first leaves of a flush somewhat obovate, (3–)5–8(–13) cm. long, (1.5–)3–6(–7) cm. wide, usually somewhat abruptly and acutely acuminate, the acumen being curved to one side, subcuneate, rounded or slightly cordate or cordulate, the 2 basal glands beneath small and sessile, subentire or minutely glandular-toothed, rigidly membranous to thinly chartaceous, 5–7-nerved from the base, remaining lateral nerves 4–6(–7) pairs, midrib and nerves prominent beneath, tertiary nerves subparallel, densely fulvous to ferruginous stellate-tomentose above and beneath at first, later becoming evenly or sparingly stellate-pubescent above and fairly densely or evenly so beneath, dark green above, paler beneath.
    Stipules
    Stipules linear-subulate or filiform, 3–6 mm. long, sparingly to evenly stellate-pubescent, readily caducous.
    Buds
    Late-season axillary buds ovoid, 7 mm. long, 4-perulate, densely tomentose.
    Inflorescences
    Racemes terminal or subterminal, up to 12 cm. long, the lower third-half ♀, the upper half-two-thirds ♂, axis fulvous to ferruginous stellate-tomentose; bracts linear, 3–5 mm. long, evenly stellate-pubescent.
    Flowers
    Male flowers:pedicels 4–5 mm. long, evenly stellate-pubescent; sepals 5, elliptic-ovate, 2 mm. long, 1 mm. wide, fulvous to ferruginous stellate-pubescent without, glabrous within, greenish; petals 5, oblong-obovate, equalling the sepals, puberulous at the base and apex, creamy-yellow or whitish; disc-glands free, rounded; stamens 15, filaments 2 mm. long, glabrous, anthers 1 mm. long; receptacle pilose. Female flowers:pedicels 0.5–1 mm. long, densely stellate-pubescent; sepals 5, linear-lanceolate, 3 mm. long, 0.5–1 mm. wide, sparingly stellate-pubescent without, glabrous within, greenish; petals 0, single stellate hairs occupying their expected points of insertion; disc 5-lobed, the lobes rounded, flat, glabrous; ovary subglobose, 1.5 mm. diameter, densely fulvous to ferruginous stellate-tomentose; styles 3, spreading, 3 mm. long, slightly pubescent at the base, bilobed, the lobes linear, 2 mm. long, glabrous.
    Male
    Male flowers:pedicels 4–5 mm. long, evenly stellate-pubescent; sepals 5, elliptic-ovate, 2 mm. long, 1 mm. wide, fulvous to ferruginous stellate-pubescent without, glabrous within, greenish; petals 5, oblong-obovate, equalling the sepals, puberulous at the base and apex, creamy-yellow or whitish; disc-glands free, rounded; stamens 15, filaments 2 mm. long, glabrous, anthers 1 mm. long; receptacle pilose.
    Female
    Female flowers:pedicels 0.5–1 mm. long, densely stellate-pubescent; sepals 5, linear-lanceolate, 3 mm. long, 0.5–1 mm. wide, sparingly stellate-pubescent without, glabrous within, greenish; petals 0, single stellate hairs occupying their expected points of insertion; disc 5-lobed, the lobes rounded, flat, glabrous; ovary subglobose, 1.5 mm. diameter, densely fulvous to ferruginous stellate-tomentose; styles 3, spreading, 3 mm. long, slightly pubescent at the base, bilobed, the lobes linear, 2 mm. long, glabrous.
    Fruits
    Fruit 3-lobed, 6 mm. long, 6 mm. diameter, septicidal, evenly brownish stellate-pubescent.
    Seeds
    Seeds broadly ovoid, 4–5 mm. long, 3–3.5 mm. wide, dark brown, with a flattened caruncle 1.5 mm. wide.
    Habitat
    Dry evergreen forest and thicket, occasionally in woodland, sometimes on rocky hills or riverine; 300–1600 m.
    Distribution
    K6 T2 T3 T5 T6 T8

    Images

    Distribution

    Native to:

    Kenya, Sudan, Tanzania, Zambia

    Accepted Infraspecifics

    Other Data

    Croton polytrichus Pax appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Schweinfurth, G. [1845], Sudan K000347434 Unknown type material

    Bibliography

    First published in Bot. Jahrb. Syst. 15: 533 (1893)

    Accepted by

    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
    • 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.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    Literature

    Flora of Tropical East Africa

    • F. W. Andr., The Flowering Plants of the Anglo-Egyptian Sudan 2: 60 (1952).
    • J.P.M. Brenan, Check-lists of the Forest Trees and Shrubs of the British Empire no. 5, part II, Tanganyika Territory p. 206 (1949).
    • A. Engler & O. Drude, Die Vegetation Der Erde, IX, Pflanzenwelt Afrikas 3(2): 48 (1921).
    • Hutch. in Flora of Tropical Africa 6(1): 752 (1912).
    • Pax in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 15: 533 (1893).

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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