1. Family: Haloragaceae R.Br.
    1. Genus: Myriophyllum Ponted. ex L.
      1. Myriophyllum aquaticum (Vell.) Verdc.

        This species is accepted, and its native range is Central & S. Tropical America.

    [FTEA]

    Haloragaceae, R. Boutique (Jardin botanique national de Belgique) & B. Verdcourt (Royal Botanic Gardens, Kew). Flora of Tropical East Africa. 1973

    Habit
    Aquatic herb, either growing in water, with most of the upper leafy parts above the water-level, or sometimes on mud; stems 0.45–1.2 m. long, simple or sparsely branched, puberulous or glabrous, with up to 1/4 emerging, mostly several from a creeping rhizome.
    Leaves
    Leaves all pinnatipartite, in whorls of 4–6, 0.6–2.5(–3) cm. long, often puberulous; lobes alternate or subopposite, 15–17(–35), linear-subulate, 1.8–5(–7) mm. long, 0.13–0.3 mm. wide, ± acute, {PAGE}{PAGE}entire or denticulate.
    Flowers
    Flowers unisexual, monoecious or mostly dioecious, solitary in the leaf-axils, the lower flowers ♀ and the upper ♂. Male flowers:bracteoles 2, linear, 1.5–3 mm. long, 0.1 mm. wide, white, very finely bifid or trifid; pedicel and calyx-tube together at first 1.3–2.5 mm. long, tenuous, later 3.5–5 mm. long, 2 mm. thick; lobes 4, oblong-lanceolate or narrowly triangular, 0.7–1.8 mm. long, 0.4 mm. wide, at first erect, later spreading, minutely serrate; petals 4, boat-shaped, 2.5–5 mm. long, 0.8–1.3 mm. wide, clawed; stamens 4–8, filaments 0.15–5 mm. long; anthers 1.9–3.5 mm. long, 0.4 mm. wide; sometimes minute rudiments of styles present. Female flowers:bracteoles 2, linear, 0.7–1.2 mm. long, 0.15 mm. wide, acute, sub-membranous, toothed at the middle; pedicels 0.3–0.7 mm. long, thick; calyx-tube 0.5–1 mm. long, 0.5–0.6 mm. wide, 4-angled, 4-grooved, the 4 lobes linear, (0.3–)0.5–1 mm. long, at first erect, later reflexed, acute, entire, minutely serrulate or pinnately ± 5-lobed; petals and stamens lacking; stigmas 4, short, 0.45–0.7 mm. long, at first erect, later decurved, capitate or claviform, shortly papillose.
    Male
    Male flowers:bracteoles 2, linear, 1.5–3 mm. long, 0.1 mm. wide, white, very finely bifid or trifid; pedicel and calyx-tube together at first 1.3–2.5 mm. long, tenuous, later 3.5–5 mm. long, 2 mm. thick; lobes 4, oblong-lanceolate or narrowly triangular, 0.7–1.8 mm. long, 0.4 mm. wide, at first erect, later spreading, minutely serrate; petals 4, boat-shaped, 2.5–5 mm. long, 0.8–1.3 mm. wide, clawed; stamens 4–8, filaments 0.15–5 mm. long; anthers 1.9–3.5 mm. long, 0.4 mm. wide; sometimes minute rudiments of styles present.
    Female
    Female flowers:bracteoles 2, linear, 0.7–1.2 mm. long, 0.15 mm. wide, acute, sub-membranous, toothed at the middle; pedicels 0.3–0.7 mm. long, thick; calyx-tube 0.5–1 mm. long, 0.5–0.6 mm. wide, 4-angled, 4-grooved, the 4 lobes linear, (0.3–)0.5–1 mm. long, at first erect, later reflexed, acute, entire, minutely serrulate or pinnately ± 5-lobed; petals and stamens lacking; stigmas 4, short, 0.45–0.7 mm. long, at first erect, later decurved, capitate or claviform, shortly papillose.
    Fruits
    Fruit ovoid, 1.8 mm. long, 1.2 mm. in diameter, papillose-punctate, eventually dividing into 4 parts.
    Figures
    Fig. 3.
    Habitat
    In artificial ponds and lakes, also by river banks, presumably originally introduced as an aquarium plant; 900–1650 m.
    Distribution
    K4 T3 naturalized or casual in parts of Europe and S. Africa
    [FZ]

    Haloragaceae, E. J. Mendes. Flora Zambesiaca 4. 1978

    Habit
    Aquatic herb, usually submerged, with the upper part floating at the surface or sometimes creeping on to sandy or muddy banks; rhizome rooted; stems up to 1·2 m. long, simple or sparsely branched at the base.
    Leaves
    Leaves all pinnatisect, in alternating whorls of (4)5–6, densely papillose (when dry simulating puberulence), usually much longer than internodes, their bases flanked by 2–3 linear, mostly recurved, deciduous stipule-like outgrowths; leaf-segments 8–16(30) on each side, linear-subulate, with a mucronulate apex; leaf-base dilated, almost concealing the stem at least at upper nodes.
    Flowers
    Flowers unisexual, solitary in the middle and upper leaf-axils; bracteoles subulate, with 1–2 lateral laciniae in male, laterally 1–2-dentate in female.
    Corolla
    Petals 4, c. 4 mm. long, absent in female.
    Stamens
    Stamens usually 8, rarely less; anthers c. 3 mm. long; filaments up to 5 mm. long.
    Stigma
    Stigmas 4, shortly papillose.
    Fruits
    Fruit c. 1·8 x 1·2 mm., ovoid, longitudinally 4-sulcate, papillose-punctate.

    Images

    Distribution

    Doubtfully present in:

    Guyana

    Native to:

    Argentina Northeast, Argentina Northwest, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Chile Central, Chile North, Chile South, Colombia, Costa Rica, French Guiana, Nicaragua, Paraguay, Peru, Uruguay, Venezuela

    Introduced into:

    Alabama, Austria, Belgium, Cape Provinces, Dominican Republic, France, Free State, Germany, Great Britain, Kenya, KwaZulu-Natal, Madagascar, Madeira, Mexico Southwest, New Mexico, Northern Provinces, Philippines, Switzerland, Taiwan, Tanzania, Tennessee, Windward Is., Zimbabwe

    Myriophyllum aquaticum (Vell.) Verdc. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nov 16, 1978 Tweedie, Argentina K000075413 Unknown type material
    Nov 16, 1978 Tweedie, Argentina K000395190 paratype
    Nov 16, 1978 Tweedie, Argentina K000395189 syntype
    Nov 16, 1978 Tweedie, Argentina K000395188 isotype
    Nov 16, 1978 Gillies [366], Argentina K000395184 lectotype
    Jan 1, 1976 Gillies [366], Argentina K000075414 lectotype
    Afzal Hamid, M. [1087], Kenya 29047.086
    Colombia K000395185
    Colombia K000395186 Unknown type material
    Colombia K000395187

    First published in Kew Bull. 28: 36 (1973)

    Accepted by

    • Parslow, R. & Bennallick, I. (2017). The new flora of the Isles of Scilly: 1-539. Parslow Press.
    • Hohla, M., Diewald, W. & Király, G. (2015). Limonium gmelinii - eine Steppenpflanze an österreichischen Autobahnen sowie weitere Neuigkeiten zur Flora Österreichs Stapfia 103: 127-150.
    • Bailey, C. & al. (2015). Guide to the Vascular Plants of Tennessee: 1-813. University of Tennessee press.
    • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741. Missouri Botanical Garden.
    • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.
    • Kuo, M.L. (ed.) (2012). Flora of Taiwan, ed. 2, Suppl.: 1-414. Editorial Committee of the Flora of Taiwan, Second Edition, National Taiwan University.
    • Dobignard, A. & Chatelain, C. (2012). Index synonymique de la flore d'Afrique du nord 4: 1-431. Éditions des conservatoire et jardin botaniques, Genève.
    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Garcia-Mendoza, A.J. & Meave, J.A. (eds.) (2012). Diversidad florística de Oaxaca: de musgos a angiospermas (colecciones y listas de especies), ed. 2: 1-351. Instituto de Biología, Universidad Nacional Autónoma de México.
    • Idárraga-Piedrahita, A., Ortiz, R.D.C., Callejas Posada, R. & Merello, M. (eds.) (2011). Flora de Antioquia: Catálogo de las Plantas Vasculares 2: 1-939. Universidad de Antioquia, Medellín.
    • Kral, R., Diamond, A.R., Ginzbarg, S.L., Hansen, C.J., Haynes, R.R., Keener, B.R., Lelong, M.G., Spaulding, D.D. & Woods, M. (2011). Annotated checklist of the vascular plants of Alabama: 1-112. Botanical reseach institute of Texas.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Hammel, B.E. & al. (eds.) (2007). Manual de Plantas de Costa Rica, volumen VI, Dicotyledóneas (Haloragaceae-Phytolaccaceae) Monographs in Systematic Botany from the Missouri Botanical Garden 111: 1-933. Missouri Botanical Garden.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
    • Stevens, W.D., Ulloa U., C., Pool, A. & Montiel, O.M. (2001). Flora de Nicaragua Monographs in Systematic Botany from the Missouri Botanical Garden 85: i-xlii, 1-2666. Missouri Botanical Garden.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.
    • Launert, E. (ed.) (1978). Flora Zambesiaca 4: 1-658. Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C., Zappi, D. & Souza, V.C. (2016-continuously updated). Flora do Brasil 2020 em construção http://reflora.jbrj.gov.br/reflora/listaBrasil/ConsultaPublicaUC/ResultadoDaConsultaNovaConsulta.do.
    • Bailey, C. & al. (2015). Guide to the Vascular Plants of Tennessee: 1-813. University of Tennessee press.
    • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741. Missouri Botanical Garden.
    • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.
    • Kuo, M.L. (ed.) (2012). Flora of Taiwan, ed. 2, Suppl.: 1-414. Editorial Committee of the Flora of Taiwan, Second Edition, National Taiwan University.
    • Dobignard, A. & Chatelain, C. (2012). Index synonymique de la flore d'Afrique du nord 4: 1-431. Éditions des conservatoire et jardin botaniques, Genève.
    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Garcia-Mendoza, A.J. & Meave, J.A. (eds.) (2012). Diversidad florística de Oaxaca: de musgos a angiospermas (colecciones y listas de especies), ed. 2: 1-351. Instituto de Biología, Universidad Nacional Autónoma de México.
    • Idárraga-Piedrahita, A., Ortiz, R.D.C., Callejas Posada, R. & Merello, M. (eds.) (2011). Flora de Antioquia: Catálogo de las Plantas Vasculares 2: 1-939. Universidad de Antioquia, Medellín.
    • Kral, R., Diamond, A.R., Ginzbarg, S.L., Hansen, C.J., Haynes, R.R., Keener, B.R., Lelong, M.G., Spaulding, D.D. & Woods, M. (2011). Annotated checklist of the vascular plants of Alabama: 1-112. Botanical reseach institute of Texas.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348. Missouri Botanical Garden.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Hammel, B.E. & al. (eds.) (2007). Manual de Plantas de Costa Rica, volumen VI, Dicotyledóneas (Haloragaceae-Phytolaccaceae) Monographs in Systematic Botany from the Missouri Botanical Garden 111: 1-933. Missouri Botanical Garden.
    • Lambion, J., Delvosalle, L. & Duvigneaud, J. (2004). Nouvelle flore de la Belgique du G. D. de Luxembourg, du Nord de la France et des régions voisines, ed. 5: 1-1167. Edition du Patrimoine du Jardin botanique national de Belgique.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.
    • Launert, E. (ed.) (1978). Flora Zambesiaca 4: 1-658. Royal Botanic Gardens, Kew.
    • Tutin, T.G. & al. (eds.) (1968). Flora Europaea 2: 1-469. Cambridge University Press.
    Flora of Tropical East Africa
    • Verdc. in Kew Bulletin 28: 36 (1973).

    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 2018. 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 2018. 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