1. Family: Lythraceae J.St.-Hil.
    1. Genus: Lythrum L.
      1. Lythrum rotundifolium Hochst. ex A.Rich.

        This species is accepted, and its native range is Ethiopia to Malawi.

    [FTEA]

    Lythraceae, B. Verdcourt. Flora of Tropical East Africa. 1984

    Habit
    Glabrous aquatic or semiaquatic herb with creeping stems often reddish, having ascending or erect apical parts, 5–60 cm. long or tall, rooting at the lower nodes.
    Leaves
    Leaves decussate; blades ± round, obovate or oblong, 0.5–2.5 cm. long, 0.35–1.1 cm. wide, rounded at apex, subcordate or truncate at the base; venation often ± yellowish; petiole 0.5–3.5 mm. long.
    Flowers
    Flowers solitary, 4-merous, heterostylous; pedicels 2–5(–7) mm. long; bracteoles linear, 1–1.5 mm. long.
    Calyx
    Calyx often pink, broadly cylindrical, 3.5–5 mm. long, 2.5–3 mm. wide, 8-veined; sepals broadly triangular, 0.8–1 mm. long, alternating with narrower sinus-horns.
    Corolla
    Petals pink, blue-purple, magenta or blue with darker venation, obovate, 6–8 mm. long, 4.5–5 mm. wide, almost immediately deciduous.
    Stamens
    Stamens 8 in two unequal whorls; short-styled flowers with stamens 5–7.5 mm. long; long-styled flowers with stamens not exceeding the sepals; anthers blue.
    Pistil
    Ovary oblong-ovoid, 2–3.5 mm. long; style up to 1 mm. long in short-styled flowers, 4–4.5 mm. long in long-styled flowers; stigma capitate.
    Fruits
    Capsule ellipsoid, 5–6 mm. long.
    Figures
    Fig. 5.
    Habitat
    In standing water, swamps, upland water-meadows, streamsides, etc., often completely filling muddy ditches or forming carpets, with Erica etc., Cyperaceae swamps in Arundinaria alpina zone, bamboo forest, Arundinaria, Podocarpus, Pygeum, Lobelia, Allophylus forest, Artemisia scrub with aquatics and grasses, also shingly river beaches in plateau grassland; 1650–3050 m.
    Distribution
    K2 K3 K4 K5 K6 T2 T3 T7 U1 U2

    Images

    Distribution

    Native to:

    Ethiopia, Kenya, Malawi, Rwanda, Sudan, Tanzania, Uganda, Zaïre

    Lythrum rotundifolium Hochst. ex A.Rich. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 1, 2008 Edwards, S. [2142], Ethiopia K000823778
    Ash [1762], Ethiopia 35576.000
    Hepper, F.N. [4876], Kenya 34372.000
    Thompson [s.n.] K000310328
    Schimper [1169], Ethiopia K000310143 isosyntype

    First published in Tent. Fl. Abyss. 1: 283 (1848)

    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.
    • Edwards, S., Tadesse, M., Demissew, S. & Hedberg, I. (eds.) (2000). Flora of Ethiopia and Eritrea 2(1): 1-532. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Troupin, G. (ed.) (1983). Flora du Rwanda 2: 1-603. Musee Royal de l'Afrique Centrale.
    • Boutique, R. (1967). Flore du Congo du Rwanda et du Burundi, Lythraceae: 1-27. Jardin Botanique National de Belgique, Bruxelles.

    Literature

    Kew Backbone Distributions
    • 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.
    • Troupin, G. (ed.) (1983). Flora du Rwanda 2: 1-603. Musee Royal de l'Afrique Centrale.
    • Boutique, R. (1967). Flore du Congo du Rwanda et du Burundi, Lythraceae: 1-27. Jardin Botanique National de Belgique, Bruxelles.
    Flora of Tropical East Africa
    • Blundell, Wild Fl. E. Afr.: 52, fig. 565 (1987).
    • Troupin, Fl. Rwanda 2: 483, fig. 152.4 (1983).
    • Hanid in A.D.Q. Agnew, Upland Kenya Wild Flowers p. 154 (1974).
    • Boutique, Flore du Congo Belge, du Ruanda et du Burundi, Lythraceae: 13 (1967).
    • Cufod., Enumeratio Plantarum Aethiopiae Spermatophyta (Supplement in Bull. Jard. Bot. Brux.) p. 610 (1958).
    • F. W. Andr., The Flowering Plants of the Anglo-Egyptian Sudan 1: 141 (1950).
    • Robyns, Flore des Spermatophytes du Parc National Albert 1: 657 (1948).
    • Mildbr. in Wissenschaftliche Ergebnisse der Deutschen Zentral-Afrika-Expedition 1907-1908, 2 (Botanik) p. 578 (1913).
    • Koehne in A. Engler, Das Pflanzenreich IV. 216: 61 (1903).
    • Koehne in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 1: 308 (1881)
    • Hiern in Flora of Tropical Africa 2: 465 (1871).
    • A. Rich., Tent. Fl. Abyss. 1: 280 (1847).
    • M.G. Gilbert in Fl. Eth., ined.

    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 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