Wolffia Horkel ex Schleid
  • Beitr. Bot. 1: 233 (1844) 


Notes: , nom. cons. Distribution: Cosmopolitan

General Description

Fronds thick, globose, ovoid, cylindrical, conical, boat-shaped convex; air spaces lacking; flowers originating in a cavity on or near the median line of the upper surface. Pistil with 1 atropous ovule.

Diagnostic Description

Free floating aquatic plants , reduced to small, leaf-like, poorly differentiated fronds; roots and veins lacking, crystal cells lacking, seeds nearly smooth. Differs from Wolffiella in having fronds globose to ovoid, boat-shaped, without airspaces, daughter fronds produced in a terminal conical cavity of the mother frond, flower originating on the upper side in a cavity in or near the median line of the frond.

Distribution

Cosmopolitan.

Distribution Map

 
  • Native distribution
  • Introduced distribution
Specimens
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Uganda
  • Macaronesia Canary Is.
  • Northern Africa Algeria
  • Morocco
  • South Tropical Africa Angola
  • Mozambique
  • Zimbabwe
  • Southern Africa Botswana
  • Cape Provinces
  • Free State
  • KwaZulu-Natal
  • Northern Provinces
  • West Tropical Africa Benin
  • Ghana
  • Guinea-Bissau
  • Ivory Coast
  • Nigeria
  • Senegal
  • Togo
  • West-Central Tropical Africa Burundi
  • Rwanda
  • Zaire
  • Western Indian Ocean Madagascar
  • Asia-Temperate Caucasus North Caucasus
  • Transcaucasus
  • China China South-Central
  • China Southeast
  • Hainan
  • Eastern Asia Japan
  • Nansei-shoto
  • Taiwan
  • Western Asia Iran
  • Lebanon-Syria
  • Palestine
  • Asia-Tropical Indian Subcontinent Assam
  • Bangladesh
  • India
  • Nepal
  • Pakistan
  • Sri Lanka
  • West Himalaya
  • Indo-China Cambodia
  • Laos
  • Myanmar
  • Thailand
  • Vietnam
  • Malesia Jawa
  • Lesser Sunda Is.
  • Malaya
  • Philippines
  • Sumatera
  • Papuasia New Guinea
  • Australasia Australia New South Wales
  • Northern Territory
  • Queensland
  • South Australia
  • Tasmania
  • Victoria
  • Western Australia
  • New Zealand New Zealand North
  • New Zealand South
  • Europe Eastern Europe Baltic States
  • East European Russia
  • South European Russia
  • Ukraine
  • Middle Europe Austria
  • Belgium
  • Czechoslovakia
  • Germany
  • Hungary
  • Netherlands
  • Northern Europe Great Britain
  • Southeastern Europe Bulgaria
  • Italy
  • Romania
  • Sicilia
  • Yugoslavia
  • Southwestern Europe Corse
  • France
  • Portugal
  • Spain
  • Northern America Eastern Canada Ontario
  • Québec
  • Mexico Mexico Central
  • Mexico Northeast
  • Mexico Northwest
  • Mexico Southeast
  • Mexico Southwest
  • North-Central U.S.A. Illinois
  • Iowa
  • Kansas
  • Minnesota
  • Missouri
  • Nebraska
  • North Dakota
  • Oklahoma
  • South Dakota
  • Wisconsin
  • Northeastern U.S.A. Connecticut
  • Indiana
  • Maine
  • Masachusettes
  • Michigan
  • New Hampshire
  • New Jersey
  • New York
  • Ohio
  • Pennsylvania
  • Vermont
  • West Virginia
  • Northwestern U.S.A. Colorado
  • Idaho
  • Oregon
  • South-Central U.S.A. Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Delaware
  • District of Columbia
  • Florida
  • Georgia
  • Kentucky
  • Louisiana
  • Maryland
  • Mississippi
  • North Carolina
  • South Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. California
  • Utah
  • Western Canada British Columbia
  • Manitoba
  • Saskatchewan
  • Southern America Brazil Brazil North
  • Brazil Northeast
  • Brazil South
  • Brazil Southeast
  • Brazil West-Central
  • Caribbean Cuba
  • Dominican Republic
  • Haiti
  • Jamaica
  • Leeward Is.
  • Netherlands Antilles
  • Puerto Rico
  • Windward Is.
  • Central America El Salvador
  • Guatemala
  • Honduras
  • Northern South America Suriname
  • Venezuela
  • Southern South America Argentina Northeast
  • Argentina Northwest
  • Chile Central
  • Paraguay
  • Uruguay
  • Western South America Bolivia
  • Colombia
  • Ecuador
Introduced into
  • Pacific North-Central Pacific Hawaii

  Bibliography

  • 1 Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
  • 2 Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.
  • 3 Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 4 Landolt, E. Lemnaceae The Families and Genera of Flowering Plants. 4, (1998).
  • 5 Gardens, K.""Royal Bot World Checklist of Selected Plant Families. (2008).

 Information From

CATE Araceae
http://araceae.e-monocot.org
Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 14 Dec 2011 . 17 Dec 2011.
  • A All Rights Reserved
Global Biodiversity Information Facility
http://data.gbif.org
  • B All Rights Reserved
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
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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