1. Family: Fabaceae Lindl.
    1. Genus: Sesbania Scop.
      1. Sesbania coerulescens Harms

        This species is accepted, and its native range is S. DR Congo to Namibia.

    [ILDIS]

    International Legume Database and Information Service

    Conservation
    Not Threatened
    Ecology
    Africa: Zambezian freshwater swamp and aquatic vegetation
    Habit
    Annual, Not climbing, Shrub/Tree
    [FZ]

    Flora Zambesiaca Leguminosae subfamily Papillionoideae by G.P. Lewis

    Leaves
    Leaves (6)7.5–40 cm long (with some lower ones to 60 cm); petioles (0.8)1.1–3.7(4.6) cm long; leaflets in (10)14–45 pairs, (0.7)1–5.2 × 0.2–1.5 cm, oblong to oblong-elliptic, obtuse to slightly emarginate at the apex, apiculate, slightly narrowed and asymmetrical at the base, entire, glabrous, punctate above with minute black dots, obscurely mottled dirty-red beneath; petiolules 0.25–2 mm long; stipels 0.5–2 mm long, usually persistent; stipules 0.7–1.5 cm × 2–6 mm, ovate-lanceolate to oblanceolate, long acuminate, caducous to persistent. Leaves (6)7.5–40 cm long (with some lower ones to 60 cm); petioles (0.8)1.1–3.7(4.6) cm long; leaflets in (10)14–45 pairs, (0.7)1–5.2 × 0.2–1.5 cm, oblong to oblong-elliptic, obtuse to slightly emarginate at the apex, apiculate, slightly narrowed and asymmetrical at the base, entire, glabrous, punctate above with minute black dots, obscurely mottled dirty-red beneath; petiolules 0.25–2 mm long; stipels 0.5–2 mm long, usually persistent; stipules 0.7–1.5 cm × 2–6 mm, ovate-lanceolate to oblanceolate, long acuminate, caducous to persistent.
    Inflorescences
    Raceme (2.5)5–23 cm long, 2–15-flowered; peduncle (1.8)4–9.5 cm long, glabrous; pedicels (0.8)1–3.5 cm long, glabrous; bracts 0.6–1.2 cm × 1–3.5 mm, linear-lanceolate to ovate-lanceolate, long acuminate, basally striped reddish-brown, glabrous, caducous to occasionally persistent; bracteoles (3)4–9 × 0.5–1.75 mm, linear-lanceolate, glabrous. Raceme (2.5)5–23 cm long, 2–15-flowered; peduncle (1.8)4–9.5 cm long, glabrous; pedicels (0.8)1–3.5 cm long, glabrous; bracts 0.6–1.2 cm × 1–3.5 mm, linear-lanceolate to ovate-lanceolate, long acuminate, basally striped reddish-brown, glabrous, caducous to occasionally persistent; bracteoles (3)4–9 × 0.5–1.75 mm, linear-lanceolate, glabrous.
    Ovary
    Ovary and style glabrous.
    Seeds
    Seeds greenish-black, heavily mottled black, 5–5.5 × 2.5 mm, 2.5 mm thick, cylindrical; hilum in small central circular pit surrounded by obscure rim aril. Seeds greenish-black, heavily mottled black, 5–5.5 × 2.5 mm, 2.5 mm thick, cylindrical; hilum in small central circular pit surrounded by obscure rim aril.
    Germination
    Seedlings with cotyledons shortly petiolulate; first foliage leaf simple, larger than cotyledons; second foliage leaf paripinnate.
    Distribution
    Also in Congo, Angola and Namibia.
    Ecology
    Gregarious on river or stream margins, lake shores and beside dams, in wet or swampy ground on edges of dambos and in floodplain grassland, occasionally in miombo woodland; 1100–1750 m.
    Habit
    Annual or biennial herb to subshrub 2.5–5 m tall. Annual or biennial herb to subshrub 2.5–5 m tall.
    Stem
    Stems pithy, glabrous, unarmed, marked with dark green or brown vertical lines or dashes. Stems pithy, glabrous, unarmed, marked with dark green or brown vertical lines or dashes.
    Calyx
    Calyx (0.6)0.7–1.3 × 0.5–1.1 cm; tube glabrous; teeth acuminate, 1.5–4 mm long, shortly woolly on margins and inner surface. Calyx (0.6)0.7–1.3 × 0.5–1.1 cm; tube glabrous; teeth acuminate, 1.5–4 mm long, shortly woolly on margins and inner surface.
    Corolla
    Petals usually blue, less frequently mauve or purple, rarely white (e.g. R.M. Davies 2879). Standard (1.9)2.1–3.4 × (1.7)1.8–3.2 cm, broad, rounded, apically emarginate, the appendages small and without free tips; wings (1.7)2.1–2.8 × 0.5–1 cm, with an upper basal tooth and with lamellate sculpturing in upper basal section on outer face; keel 1.9–2.4 × 1–1.5 cm, limb subquadrate with basal tooth projecting upwards. Standard (1.9)2.1–3.4 × (1.7)1.8–3.2 cm, broad, rounded, apically emarginate, the appendages small and without free tips; wings (1.7)2.1–2.8 × 0.5–1 cm, with an upper basal tooth and with lamellate sculpturing in upper basal section on outer face; keel 1.9–2.4 × 1–1.5 cm, limb subquadrate with basal tooth projecting upwards. Petals usually blue, less frequently mauve or purple, rarely white (e.g. R.M. Davies 2879).
    Pistil
    Ovary and style glabrous.
    Fruits
    Pod (20)25–36 cm × 3.5–6 mm, linear, long acuminate, glabrous, 25–37-seeded; septa 8–9 mm apart; lower suture angular, up to 4 mm wide, broader than the keeled to somewhat angular upper suture which opens first. Pod (20)25–36 cm × 3.5–6 mm, linear, long acuminate, glabrous, 25–37-seeded; septa 8–9 mm apart; lower suture angular, up to 4 mm wide, broader than the keeled to somewhat angular upper suture which opens first.
    Seedling
    Seedlings with cotyledons shortly petiolulate; first foliage leaf simple, larger than cotyledons; second foliage leaf paripinnate.

    Images

    Distribution

    Native to:

    Angola, Namibia, Zambia, Zaïre, Zimbabwe

    Sesbania coerulescens Harms appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 18, 1985 Brummitt, R.K. [16997], Zambia K000317621
    Oct 15, 1982 Fanshawe, D.B. [s.n.], Zambia K000317606
    Oct 13, 1981 Philcox, D. [9049], Zimbabwe K000317617
    Robinson, E.A. [3410], Zambia K000317605
    Fanshawe, D.B. [9619], Zambia K000317607
    Fanshawe, D.B. [F1077], Zambia K000317609
    Fanshawe, D.B. [9619], Zambia K000317608
    Lawton, R.M. [234], Zambia K000317622
    Corby, H.D.L. [1771], Zimbabwe K000317615
    Biegel, H.M. [2886], Zimbabwe K000317613
    Biegel, H.M. [2901], Zimbabwe K000317614
    Bingham, M.G. [532], Zimbabwe K000317612
    Richards, H.M. [5695], Zambia K000317601
    Richards, H.M. [23203], Zambia K000317603
    Richards, H.M. [2075], Zambia K000317620
    Richards, H.M. [14955], Zambia K000317624
    Richards, H.M. [5695], Zambia K000317602
    Richards, H.M. [23203], Zambia K000317604
    Richards, H.M. [14955], Zambia K000317625
    Baum, H. [782], Angola K000317616 isotype
    Stohr, F.O. [820], Zambia K000317626
    Verboom, W.C. [1207], Zambia K000317600
    [Unknown] K000393412
    Shepherd, C. [32], Zambia K000317623

    First published in O.Warburg (ed.), Kunene-Sambesi Exped.: 260 (1903)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Brummitt, R.K. & al. (2007). Flora Zambesiaca 3(3): 1-258. Royal Botanic Gardens, Kew.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
    • Lock, J.M. (1989). Legumes of Africa a check-list: 1-619. Royal Botanic Gardens, Kew.

    Literature

    Flora Zambesiaca
    • —M. Coates Palgrave, Trees Sthn. Africa: 381 (2002).
    • —K. Coates Palgrave, Trees Sthn. Africa, ed.2: 313 (1988).
    • —Lewis in Kirkia 13: 25 (1988).
    • —Corby in Kirkia 9: 326 (1974).
    • —Schreiber in Merxmüller, Prodr. Fl. SW Afrika, fam. 60: 110 (1970).
    • —Gillett in Kew Bull. 17: 117 (1963).
    • —Sousa in C.F.A. 3: 183 (1962) as “caerulescens”.
    • —White, F.F.N.R.: 165 (1962) as “caerulescens”.
    • —Cronquist in F.C.B. 5: 78 (1954).
    • —Baker f., Legum. Trop. Africa: 260 (1929).
    • —Phillips & Hutchinson in Bothalia 1: 46 (1921) as “caerulescens”.
    • in Warburg, Kunene-Samb.-Exped. Baum: 260 (1903).
    Kew Backbone Distributions
    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Lock, J.M. (1989). Legumes of Africa a check-list: 1-619. Royal Botanic Gardens, Kew.
    International Legume Database and Information Service
    • Robyns, W. (Ed.) (1954). Flore du Congo Belge, Vol 5; Galegeae, Hedysareae.

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    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/

    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