1. Family: Fabaceae Lindl.
    1. Genus: Crotalaria L.
      1. Crotalaria nigricans Baker

        This species is accepted, and its native range is Tanzania to S. Tropical Africa.

    [FZ]

    Leguminosae, various authors. Flora Zambesiaca 3:7. 2003

    Habit
    Perennial herb; stems erect or prostrate, much branched, 0.3–1.5 m long, with fine spreading hairs; plants often drying blackish.
    Leaves
    Leaves 3-foliolate; leaflets (1)1.5–3 × 0.5–1.2 cm, oblanceolate to oblong-obovate, usually sparsely pubescent above, thinly hairy beneath; petiole 2–6 mm long; stipules 3–6 mm long, lanceolate.
    Flowers
    Flowers 4–12 in sessile or shortly pedunculate terminal heads; bracts 4–7(9) mm long, ovate, acuminate; pedicels short; bracteoles inserted just below the calyx, similar to the bract but a little smaller.
    Calyx
    Calyx 4-lobed, 8–13 mm long, almost enclosing the corolla, slightly accrescent, pubescent; lobes ovate, 2–3 times as long as the tube.
    Corolla
    Standard circular-ovate to oblate, usually pale yellow, reddish-tinged and puberulous along the midvein outside towards the apex; wings longer than the keel; keel 8–10 mm long, rounded about the middle, with a short incurved beak.
    Fruits
    Pod enveloped by the calyx, sessile, 7–10 mm long, ellipsoid, spreading pubescent outside, sparsely hairy inside, 4–8-seeded.
    Seeds
    Seeds c. 2.5 mm long, oblique-cordiform, smooth, mauvish-brown.
    [ILDIS]

    International Legume Database and Information Service

    Conservation
    Not Threatened
    Ecology
    Africa: Zambezian woodland
    Habit
    Perennial, Not climbing, Herb
    [FTEA]

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

    Habit
    Perennial, with erect or prostrate stems, up to 7(–15) dm. long.
    Stem
    Stem much branched, with rather sparse fine spreading hairs; plants often drying blackish.
    Leaves
    Leaves shortly petiolate, 3-foliolate; leaflets oblanceolate to obovate-oblong, up to 15–28 mm. long, 5–12 mm. wide, sparsely pubescent or rarely glabrous above, thinly pubescent beneath; petiole up to 2–6 mm. long.
    Stipules
    Stipules lanceolate, up to 3–6 mm. long.
    Flowers
    Flowers ± 4–12, in sessile or shortly pedunculate dense heads up to 2·5 cm. long; bracts ovate, up to 5(–9) mm. long, acuminate; bracteoles inserted just below the calyx, similar to the bract, but slightly smaller.
    Calyx
    Calyx 4-lobed, almost enclosing the petals, slightly accrescent, 8–13 mm. long, pubescent; lobes ovate, 2–3 times as long as the tube.
    Corolla
    Standard orbicular-obovate to oblate, usually pale yellow, slightly reddish tinged and puberulous along the midvein towards the apex outside; wings longer than the keel; keel rounded about the middle, with a short incurved untwisted beak, up to 8–10 mm. long.
    Fruits
    Pod sessile, ellipsoid, 7–10 mm. long, enclosed by the accrescent calyx, spreading pubescent outside, sparsely hairy inside, ± 4–7-seeded.
    Seeds
    Seeds oblique-cordiform, ± 2·5 mm. long, smooth, mauvish-brown.

    Distribution

    Native to:

    Malawi, Mozambique, Tanzania, Zambia, Zaïre

    Crotalaria nigricans Baker appears in other Kew resources:

    First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 2: 21 (1871)

    Accepted by

    • Pope, G.V., Polhill, R.N. & Martins, E.S. (eds.) (2003). Flora Zambesiaca 3(7): 1-274. Royal Botanic Gardens, Kew.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
    • Lock, J.M. (1989). Legumes of Africa a check-list: 1-619. Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Pope, G.V., Polhill, R.N. & Martins, E.S. (eds.) (2003). Flora Zambesiaca 3(7): 1-274. Royal Botanic Gardens, Kew.
    Flora of Tropical East Africa
    • Wilczek in Flore du Congo Belge et du Ruanda-Urundi, 4:110, fig. 8 (1953).
    • J.P.M. Brenan, Check-lists of the Forest Trees and Shrubs of the British Empire no. 5, part II, Tanganyika Territory p. 413 (1949).
    • Verdoorn in Bothalia 2: 384 (1928).
    • Harms in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 54: 383 (1917).
    • Bak. f. in Journal of the Linnean Society of London, Botany 42: 308 (1914).
    • Oliv. in Trans. Linn. Soc. 29: 51, t. 26/A (1872).
    • Bak. in Flora of Tropical Africa 2: 21 (1871).
    International Legume Database and Information Service
    • Polhill, R. M. (1982). A. A. Balkema, Rotterdam 389pp Crotalaria in Africa & Madagasca

    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

    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