1. Family: Fabaceae Lindl.
    1. Genus: Vachellia Wight & Arn.
      1. Vachellia drepanolobium (Harms ex Y.Sjöstedt) P.J.H.Hurter

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

    [FTEA]

    Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

    Habit
    Bush or small tree 1–5(–7.5) m. high, with short radiating branches from main stem, sometimes spreading at top.
    Branches
    Young branchlets shortly pubescent to puberulous, rarely glabrous, grey then going brown; no powdery inner bark on twigs.
    Bark
    Old bark black or grey, usually rough, sometimes smoothish.
    Stipules
    Stipules spinescent, mostly 1.5–4.5(–7.5) cm. long (some shorter ones often also present), straight, grey or whitish, some fused at base into ± round “ant-galls” 1–3.5 cm. in diameter, grape-purple going blackish.
    Leaves
    Leaves:petiole 2–5 (very rarely to 10) mm. long, glandular at the lowest of the 3–13 pairs of pinnae; rhachis 0.8–4.5(–9) cm. long, glandular between the top 1–6 pairs of pinnae; leaflets 11–22 pairs, glabrous or minutely ciliolate, subacute or acute sometimes obtuse at apex, 1.5–5.5 mm. long, 0.7–1.25 (–1.75) mm. wide.
    Flowers
    Flowers white or sometimes cream, in heads; involucel at or rarely a short way above base of the glabrous puberulous or shortly pubescent peduncle.
    Calyx
    Calyx 0.75–1.5(–2.5) mm, long, glabrous or ciliolate.
    Corolla
    Corolla glabrous outside, sometimes puberulous on lobes, 3–4 mm. long.
    Fruits
    Pods (Fig. 16/48, p. 67) falcate or annular, thinly coriaceous, finely longitudinally venose, glabrous or ± puberulous, mostly attenuate or even acuminate at ends, 4–7 cm. long, 0.5–1.0 cm. wide.
    Seeds
    Seeds mottled whitish-grey and dark brown, smooth, irregularly quadrate or elliptic, compressed, 10–12 mm. long, 4.5–5.5 mm. wide; areole 5–6 mm. long, 3–3.5 mm. wide.
    Habitat
    Shrub or dwarf-tree grassland; “gregarious, usually on alkaline hard-pan grey soils with Lannea humilis and Commiphora schimperi, or in fringing ‘mbuga’, or on dark clay cracking lime-accumulating soils” (T.T.C.L.: 336); 600–2680 m.
    Distribution
    K1 K2 K3 K4 K5 K6 T1 T2 T3 T4 T5 U1 U3
    [ILDIS]

    International Legume Database and Information Service

    Conservation
    Not Threatened
    Ecology
    Africa: Somalia-Masai wooded grasslands.
    Habit
    Perennial, Not climbing, Shrub/Tree
    Vernacular
    Whistling Thorn

    Distribution

    Native to:

    Ethiopia, Kenya, Somalia, Sudan, Tanzania, Uganda, Zaïre

    Vachellia drepanolobium (Harms ex Y.Sjöstedt) P.J.H.Hurter appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Richards, H.M. [7061], Tanzania Acacia drepanolobium 16399.000

    First published in D.J.Mabberley, Plant-book, ed. 3: 1021 (2008)

    Literature

    Kew Backbone Distributions
    • Lock, J.M. (1989). Legumes of Africa a check-list: 1-619. Royal Botanic Gardens, Kew.

    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.

    International Legume Database and Information Service
    International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    http://creativecommons.org/licenses/by/3.0

    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 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