Taxon:  Ludwigia hexapetala (Hook. & Arn.) Zardini et al.



Summary
Genus:
Ludwigia
Family:
Onagraceae
Subfamily:
Ludwigioideae
Nomen number:
419489
Place of publication:
Syst. Bot. 16:243.  1991
Verified:
11/15/2001 ARS Systematic Botanists.
Accessions:
0 (0  active, 0  available) in National Plant Germplasm System. 
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Basionym
Jussiaea hexapetala Hook. & Arn.

Homotypic Synonym(s)
Ludwigia grandiflora (Michx.) Greuter & Burdet subsp. hexapetala (Hook. & Arn.) G. L. Nesom & Kartesz

Invalid Designation(s)
Ludwigia uruguayensis auct., pro parte
No images


Conservation Status

Reference(s)
  1. University of Georgia Center for Invasive Species and Ecosystem Health
  2. Jørgensen, P. M. & S. León-Yánez, eds. 1999. Catalogue of the vascular plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75
  3. National Plant Board. 2008-. National Plant Board federal and state quarantine summaries
  4. Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
  5. Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
  6. 2018. Mid-Atlantic invasive plant species (on-line resource)
Common names
LanguageNameAlternate namenoteseqCitation
Englishwater-primrose http://nationalplantboard.org/docs/summaries/washington.pdf1National Plant Board. 2008-. National Plant Board federal and state quarantine summaries
Distribution
order_codeStatusContinentSubcontinentCountryStateNoteReference
1NativeNorthern AmericaSouth-Central U.S.A.United StatesTexas Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesAlabama Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesArkansas Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesFlorida Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesGeorgia Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesKentucky Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesLouisiana Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesMississippi Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesNorth Carolina Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesSouth Carolina Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesTennessee Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeNorthern AmericaSoutheastern U.S.A.United StatesVirginia Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
1NativeSouthern AmericaBrazilBrazil s.Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaCentral AmericaCosta Rica  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaSouthern South AmericaArgentina n. & c.Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaSouthern South AmericaChile c.Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaSouthern South AmericaParaguay e.Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaSouthern South AmericaUruguay  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaWestern South AmericaBolivia  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaWestern South AmericaColombia  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaWestern South AmericaEcuador  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
1NativeSouthern AmericaWestern South AmericaPeru  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
4NaturalizedEurope Europe  Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
4NaturalizedNorthern America North America natzd. elsewhereZardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
Native
Northern America
  • SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
  • SOUTH-CENTRAL U.S.A.: United States [Texas]
Southern America
  • CENTRAL AMERICA: Costa Rica
  • BRAZIL: Brazil (s.)
  • WESTERN SOUTH AMERICA: Bolivia, Colombia, Ecuador, Peru
  • SOUTHERN SOUTH AMERICA: Argentina (n. & c.), Chile (c.), Paraguay (e.), Uruguay
Naturalized
Europe
  • REGION: Europe
Northern America
  • REGION: North America (natzd. elsewhere)

Reference(s)
  1. Nesom, G. L. & J. T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea 65:123-125. Note: = Ludwigia grandiflora subsp. hexapetala (Hook. & Arn.) Nesom & Kartesz
  2. Zardini, E. M. et al. 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Syst. Bot. 16:242-244. www.aspt.net/systematic-botany
Economic Uses
UsageTypeNoteReference
Weed  National Plant Board. 2008-. National Plant Board federal and state quarantine summaries
Cite as: USDA, Agricultural Research Service, National Plant Germplasm System. 2026. Germplasm Resources Information Network (GRIN Taxonomy). National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: https://npgsweb.ars-grin.gov/gringlobal/taxon/taxonomydetail?id=419489. Accessed 16 October 2026.