Egeria densa Planch.
  • Planch., Ann. Sci. Nat., Bot. , III, 11: 80 (1849)


This taxon is accepted by WCS higher taxonomy

General Description

Leaves up to 40 x 5 mm, in whorls of 3-5, more or less densely crowded, minutely denticulate. Sepals 3-4 mm. Petals 8-11 mm, obovate to suborbicular, white.

Stems 0.9–3 mm. in diameter, whitish or green. Scale-like leaves ovate, 1.5–2.5 mm. long, 1.5–2.5 mm. wide, light green or brownish. All other leaves in whorls of 2–5, linear-lanceolate to narrowly oblong, narrowly acute to subobtuse, 1.5–4 cm. long, 0.15–4.8 mm. wide, light to mid-green. Male spathe 7.5–13 mm. long, 1.2–4 mm. wide, greenish white, tinged with pink, somewhat translucent. Male flowers: pedicel up to 80 mm. long; sepals ovate to widely ovate, 2.2–3.5(–5) mm. long, 1.5–2.2(–3) mm. wide, greenish; petals elliptic to orbicular, 6–8(–10) mm. long, 3–8 mm. wide, white; stamens up to 6 mm. long; anthers 0.6–0.7(–1.8) mm. long, yellow; filaments club-shaped, contracted below anthers, papillose above, (0.8–)1.1–1.3(–4.5) mm. long, yellow; nectaries ± 0.8 mm. in diameter, the lateral lobes as long as or longer than the central lobes. Female spathe 9–14 mm. long, 2–4 mm. wide. Female flower: sepals ovate to widely ovate, 3–4 mm. long, 1.6–3 mm. wide, green; petals widely elliptic to suborbicular, 4–8.5 mm. long, 4–7 mm. wide; staminodes 3, linear, papillose, 0.9–2.4 mm. long, yellow to reddish orange; ovary 2–3 mm. long, 1.1–2.2 mm. wide, containing ± 6 ovules; perianth-tube up to 40 mm. or more long; stigmas 2.4–3.8 mm. long, deeply 2-lobed. Fruit 11.5–14.5 mm. long, 4–5.5 mm. wide. Seeds narrowly ellipsoid, 7.2 mm. long, ± 2 mm. wide, brown. Fig. 3.

Diagnostic Description

Plant of fresh water, submerged; stems elongated, leafy; leaves sessile, linear; linear spathes sessile in the leaf-axils. Male spathes 2- to 4-flowered; petals much longer and wider than the sepals.

Habitat

HAB. Still or slow-flowing freshwater; 360–2400 m.

Distribution

Kenya Nairobi, Nairobi R., 26 Jan. 1961, Verdcourt 3044!

Kenya Marsabit, 14 Feb. 1953, Gillett 15108!

Kenya Kinangop, May 1943, Copley in C.M. 11656!

Uganda cultivated in Makerere University Botanic Garden, originally from near Kampala, July 1969, Lye 3443!

Literature

in Ann. Sci. Nat, sér. 3, 11: 80 (1849); H. St. John in Darwiniana 12: 297 (1961); U.K.W.F.: 649 (1974); Cook & Lüönd in Aquat. Bot. 19: 80 (1984).

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Southern America Brazil Brazil South
  • Brazil Southeast
  • Southern South America Argentina Northeast
  • Uruguay
Introduced into
  • Africa East Tropical Africa Kenya
  • Uganda
  • Macaronesia Azores
  • Northern Africa Algeria
  • Southern Africa Cape Provinces
  • Free State
  • KwaZulu-Natal
  • West Tropical Africa Ghana
  • Asia-Temperate Caucasus North Caucasus
  • Transcaucasus
  • China China Southeast
  • Eastern Asia Taiwan
  • Australasia New Zealand New Zealand North
  • New Zealand South
  • Europe Middle Europe Czechoslovakia
  • Germany
  • Netherlands
  • Switzerland
  • Northern Europe Great Britain
  • Southeastern Europe Italy
  • Turkey-in-Europe
  • Southwestern Europe France
  • Spain
  • Northern America Mexico Mexico Central
  • Mexico Northeast
  • Mexico Southeast
  • Mexico Southwest
  • North-Central U.S.A. Illinois
  • Kansas
  • Missouri
  • Nebraska
  • Oklahoma
  • Northeastern U.S.A. Indiana
  • Masachusettes
  • New Jersey
  • New York
  • Pennsylvania
  • Vermont
  • West Virginia
  • Northwestern U.S.A. Colorado
  • Oregon
  • South-Central U.S.A. Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Delaware
  • Florida
  • Georgia
  • Kentucky
  • Louisiana
  • Maryland
  • Mississippi
  • North Carolina
  • South Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. Arizona
  • California
  • Pacific North-Central Pacific Hawaii
  • South-Central Pacific Society Is.
  • Southern America Caribbean Cuba
  • Jamaica
  • Puerto Rico
  • Windward Is.
  • Central America Costa Rica
  • El Salvador
  • Nicaragua
  • Northern South America Venezuela
  • Southern South America Chile Central

  Bibliography

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  • 2 Danihelka, J. Chrtek, J. & Kaplan, Z. (2012). Checklist of vascular plants of the Czech Republic. Preslia. Casopsi Ceské Botanické Spolecnosti 84: 647-811.
  • 3 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.
  • 4 Bonilla-Barbosa, J. & Santamaria Araúz, B. (2010). Flora del Bajío y de regionés adyacentes 168: 1-11. Instituto de ecología A.C. Centro regional del Bajío Pátzcuaro, Michoacán, México.
  • 5 Castroviejo, S. & al. (eds.) (2010). Flora Iberica 17: 1-298. Real Jardín Botánico, CSIC, Madrid.
  • 6 Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • 7 Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.
  • 8 Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
  • 9 van Valkenburg, J. & Pot, R. (2008). Lagarosiphon major (Ridl.) Moss (Verspreidbladige waterpest) nu ook gevestigd in de Groene Ruimte in Nederland. Gorteria; Mededelingenblad ten Dienste van de Floristiek en het Vegetatie-Onderzoek van Nederland 33: 89-92.
  • 10 Takhtajan, A.L. (ed.) (2006). Conspectus Florae Caucasi 2: 1-466. Editio Universitatis Petropolitanae.
  • 11 Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • 12 Hammel, B.E. & al. (2003). Manual de Plantas de Costa Rica 2: 1-694. Missouri Botanical Garden Press, St. Louis.
  • 13 Fournet, J. (2002). Flore illustrée des phanérogames de Guadeloupe et de Martinique 2: 1325-2538. Gondwana editions.
  • 14 Stevens, W.D. & al. (eds.) (2001). Flora de Nicaragua 2: 945-1910. Missouri Botanical Garden Press, St. Louis.
  • 15 Flora of North America Editorial Committee (2000). Flora of North America North of Mexico 22: 1-352. Oxford University Press, New York, Oxford.
  • 16 Liogier, H.A. & Martorell, L.F. (2000). Flora of Puerto Rico and Adjacent Islands: a Systematic Synopsis ed. 2: 1-382. Editorial de la Universidad de Puerto Rico, San Juan.
  • 17 Wagner, W.L., Herbst, D.R. & Sohmer, S.H. (1999). Manual of the Flowering Plants of Hawai'i. Revised Edition, Volume 2. Special Publications; Bernice Pauahi Bishop Museum 97: 989-1919.
  • 18 Welsh, S.L. (1998). Flora Societensis: 1-420. E.P.S. Inc. Utah.
  • 19 Espejo Serena, A. & López-Ferrari, A.R. (1996). Las Monocotiledóneas Mexicanas una Sinopsis Florística 1(6): 1-116. Consejo Nacional de la Flora de México, México D.F..
  • 20 Zuloaga, F.O. & Morrone, O. (eds.) (1996). Pteridophyta, Gymnospermae y Angiospermae (Monocotyledoneae). Catálogo de las Plantas Vasculares de la República Argentina 1: 1-323. Missouri Botanical Garden, St. Louis.
  • 21 Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F..
  • 22 David Simpson (1989) Hydrocharitaceae. Flora of Tropical East Africa 0 (0)
  • 23 Simpson, D. (1989). Hydrocharitaceae. Flora of Tropical East Africa: 1-29.
  • 24 Davis, P.H. (ed.) (1984). Flora of Turkey and the East Aegean Islands 8: 1-632. Edinburgh University Press, Edinburgh.
  • 25 Healey, A.J. & Edgar, E. (1980). Flora of New Zealand 3: 1-220. R.E.Owen, Government Printer, Wellington.
  • 26 Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.
  • 27 Navas Bustamante, L.E. (1973). Flora de la Cuenca de Santiago de Chile 1: 1-301. Comisión Central de Publicaciones de la Universidad de Chile.
  • 28 Adams, C.D. (1972). Flowering Plants of Jamaica: 1-848. University of the West Indies, Mona.
  • 29 Maire, R. (1952). Flore de l'Afrique du Nord 1: 1-366. Paul Lechevalier, Paris.
  • 30Dandy, J.E. Egeria Planchon. Flora Europaea 5, 4 (1980).

 Information From

Flora of Tropical East Africa
http://apps.kew.org/efloras/
Flora of Tropical East Africa. Published on the Internet; http://apps.kew.org/efloras/
WCS higher taxonomy
  • B All Rights Reserved
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    © Cambridge University Press 1980

    All Rights Reserved
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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