Skip to main content
  1. Family: Euphorbiaceae Juss.
    1. Genus: Croton L.
      1. Croton kilwae Radcl.-Sm.

        This species is accepted, and its native range is Tanzania (Kilwa), N. Mozambique.

    [FTEA]

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

    Habit
    A graceful monoecious shrub 1.5–3 m. tall.
    Twigs
    Young twigs slender, densely lepidote; older twigs glabrescent, sparingly lenticellate, greyish brown.
    Leaves
    Petioles 2–6 mm. long, lepidote; leaf-blade elliptic-ovate to ovate-lanceolate, (0.5–)2–7 cm. long, (0.2–) 1–3 cm. wide, usually acutely acuminate, rounded-cuneate, entire, with a pair of stipitate basal glands visible from above, membranaceous, lateral nerves 7–10 pairs, scarcely prominent above or beneath, evenly minutely stellate-pubescent and green above, silvery lepidote and sometimes faintly brown flecked beneath.
    Stipules
    Stipules subulate, 1 mm. long, lepidote.
    Inflorescences
    Racemes terminal, 3–5 cm. long, slender, up to 10-flowered, mostly ♂ but with 1–2 ♀ flowers at the base, completely lepidote; bracts resembling the stipules.
    Flowers
    Male flowers:pedicels up to 8 mm. long, slender; sepals 5, ovate, 2 mm. long, 1.25 mm. wide, acute, lepidote without, glabrous within, ciliate, white; petals 5, narrowly oblanceolate, 2 mm. long, 0.5 mm. wide, obtuse, glabrous without and within, ciliate, white; disc 5-lobed, covering the receptacle, the lobes truncate; stamens 16, filaments 1 mm. long, pubescent, anthers 0.75 mm. long. Female flowers:pedicels up to 1 cm. long; sepals as in the ♂ flowers; petals 0; disc minute; ovary globose, 1.5 mm. diameter, lepidote; styles 3, suberect, 2 mm. long, lepidote at the base, otherwise glabrous, deeply quadripartite, the lobes filiform, entire.
    Male
    Male flowers:pedicels up to 8 mm. long, slender; sepals 5, ovate, 2 mm. long, 1.25 mm. wide, acute, lepidote without, glabrous within, ciliate, white; petals 5, narrowly oblanceolate, 2 mm. long, 0.5 mm. wide, obtuse, glabrous without and within, ciliate, white; disc 5-lobed, covering the receptacle, the lobes truncate; stamens 16, filaments 1 mm. long, pubescent, anthers 0.75 mm. long.
    Female
    Female flowers:pedicels up to 1 cm. long; sepals as in the ♂ flowers; petals 0; disc minute; ovary globose, 1.5 mm. diameter, lepidote; styles 3, suberect, 2 mm. long, lepidote at the base, otherwise glabrous, deeply quadripartite, the lobes filiform, entire.
    Fruits
    Fruit globose or very slightly trilobate, 7 mm. long, 8 mm. diameter, septicidal, densely lepidote.
    Seeds
    Seeds compressed ovoid-ellipsoid, 5.5 mm. long, 4 mm. wide, yellowish brown, shiny, with a shallowly conical caruncle 1.3 mm. wide.
    Habitat
    In ground-water forest and in Brachylaena forest; 45–100 m.
    Distribution
    T8
    [FZ]

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

    Habit
    A shrub up to 4 m high, monoecious.
    Twigs
    Twigs greyish-brown.
    Indumentum
    Young growth densely rusty-lepidote.
    Stipules
    Stipules 1–2 mm long, triangular-subulate.
    Petiole
    Petioles 3–5 mm long.
    Leaf lamina
    Leaf blades 2–10 × 1–3.5 cm, elliptic-ovate to ovate-lanceolate, acuminate at the apex, entire, rounded to cordulate at the base, with a pair of shortly-stipitate or sessile basal glands at the petiole apex, membranaceous, evenly minutely stellate-pubescent and green on the upper surface, silvery-lepidote and faintly brown-flecked beneath; lateral nerves in 10–18 pairs, not or scarcely prominent above or beneath.
    Inflorescences
    Racemes 3–5 cm long, slender, terminal on short lateral shoots, mostly male with 1–2 female flowers at the base; bracts resembling the stipules.
    Male
    Male flowers: pedicels 7 mm long, slender; sepals 5, 2 × 1.5 mm, ovate, lepidote without, glabrous within, white; petals 5, 2 × 0.5 mm, narrowly oblanceolate, ciliate but otherwise glabrous, white; disk 5-lobed, the lobes truncate; stamens 16, filaments 1 mm long, pubescent, anthers 0.75 mm long.
    Flowers
    Female flowers: pedicels 3–8 mm long, stouter than in the male, densely lepidote; sepals 5, 2 × 1 mm, elliptic, lepidote without, minutely puberulous within near the apex; petals absent; disk crenellate, thin, flat; ovary 2 mm in diameter, globose, densely lepidote; styles 3–4, 2–2.5 mm long, suberect, deeply 4-partite with filiform segments, lepidote at the base, otherwise glabrous, purplish. Male flowers: pedicels 7 mm long, slender; sepals 5, 2 × 1.5 mm, ovate, lepidote without, glabrous within, white; petals 5, 2 × 0.5 mm, narrowly oblanceolate, ciliate but otherwise glabrous, white; disk 5-lobed, the lobes truncate; stamens 16, filaments 1 mm long, pubescent, anthers 0.75 mm long.
    Female
    Female flowers: pedicels 3–8 mm long, stouter than in the male, densely lepidote; sepals 5, 2 × 1 mm, elliptic, lepidote without, minutely puberulous within near the apex; petals absent; disk crenellate, thin, flat; ovary 2 mm in diameter, globose, densely lepidote; styles 3–4, 2–2.5 mm long, suberect, deeply 4-partite with filiform segments, lepidote at the base, otherwise glabrous, purplish.
    Fruits
    Fruits 7 × 7–8 mm, very slightly trilobate or quadrilobate-subglobose, septicidal, evenly lepidote.
    Seeds
    Seeds 6 × 4 × 3 mm, somewhat compressed-ellipsoid, smooth, slightly shiny, pale greyish-brown; caruncle c. 1.5 mm wide, shallowly convex.

    Images

    Distribution

    Native to:

    Mozambique, Tanzania

    Other Data

    Croton kilwae Radcl.-Sm. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Vollesen, K. [4368], Tanzania K000347458 holotype

    Bibliography

    First published in Kew Bull. 37: 422 (1982)

    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.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    Literature

    Flora of Tropical East Africa

    • A.R.-Sm. in Kew Bulletin 37: 422 (1982).

    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

    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