Ludwigia grandiflora(Michx.) Greuter & Burdet

Largeflower primrose-willowUruguayan Hampshire-purslaneWater primroselarge-flower primrose-willow

WFO wfo-0001087942 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Ludwigia grandiflora, photographed by Fátima Helena Yáñez
fig. a Fátima Helena Yáñez, CC BY 4.0 / 2021-10-23 / obs. 165535301
Ludwigia grandiflora, photographed by Jean-Silouane Rebours
fig. b Jean-Silouane Rebours, CC BY 4.0 / obs. 156031294
Ludwigia grandiflora, photographed by Crap Fou
fig. c Crap Fou, CC BY 4.0 / obs. 143620850
Ludwigia grandiflora, photographed by purperlibel
fig. d purperlibel, CC BY-SA 4.0 / obs. 85611384
Ludwigia grandiflora, photographed by purperlibel
fig. e purperlibel, CC BY-SA 4.0 / obs. 47745336
Ludwigia grandiflora, photographed by Gilles San Martin
fig. f Gilles San Martin, CC BY-SA 4.0 / obs. 91023081
Ludwigia grandiflora, photographed by Hugo Hulsberg
fig. g Hugo Hulsberg, CC0 1.0 / obs. 169874084
Ludwigia grandiflora, photographed by Laura Clark
fig. h Laura Clark, CC BY 4.0 / obs. 197953456

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 30 botanical countries

Regions where Ludwigia grandiflora is native: Alabama, Arkansas, California, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Mississippi, Missouri, New Jersey, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Washington, West Virginia, Argentina Northeast, Argentina Northwest, Bolivia, Brazil South, Cuba, Guatemala, Paraguay, Uruguay AlabamaArkansasCaliforniaFloridaGeorgiaKentuckyLouisianaMississippiMissouriNew JerseyNew YorkNorth CarolinaOklahomaOregonPennsylvaniaSouth CarolinaTennesseeTexasVirginiaWashingtonWest VirginiaArgentina NortheastArgentina NorthwestBoliviaBrazil SouthCubaGuatemalaParaguayUruguay District of Columbia
Native distribution of Ludwigia grandiflora, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
California CAL
District of Columbia WDC
Florida FLA
Georgia GEO
Kentucky KTY
Louisiana LOU
Mississippi MSI
Missouri MSO
New Jersey NWJ
New York NWY
North Carolina NCA
Oklahoma OKL
Oregon ORE
Pennsylvania PEN
South Carolina SCA
Tennessee TEN
Texas TEX
Virginia VRG
Washington WAS
West Virginia WVA
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Bolivia BOL
Brazil South BZS
Cuba CUB
Guatemala GUA
Paraguay PAR
Uruguay URU

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 398 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -0.3 °C 4.3 °C 11.6 °C
Warmest month, mean daily high 22.0 °C 29.6 °C 31.9 °C
Annual rainfall 465 mm 767 mm 1,634 mm
Rainfall in the driest quarter 37 mm 116 mm 298 mm

It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 398 research-grade observations of Ludwigia grandiflora that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 19 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Adenola grandiflora (Michx.) Raf.
  • Jussiaea grandiflora Michx.
  • Jussiaea grandiflora f. natans Glück
  • Jussiaea grandiflora f. semiserrata Glück
  • Jussiaea grandiflora f. terrestris Glück
  • Jussiaea michauxiana Fernald
  • Jussiaea repens f. intermedia Hassl.
  • Jussiaea repens subsp. grandiflora (Michx.) P.Fourn.
  • Jussiaea repens var. grandiflora (Michx.) Micheli
  • Jussiaea repens var. grandiflora Micheli
  • Jussiaea repens var. hispida Hauman
  • Jussiaea repens var. major Hassl.
  • Jussiaea repens var. uruguayensis Hassl.
  • Jussiaea uruguayensis Cambess.
  • Jussiaea uruguayensis f. major (Hassl.) Munz
  • Jussiaea uruguayensis var. genuina Munz
  • Ludwigia clavellina var. grandiflora (Michx.) M.Gómez
  • Ludwigia uruguayensis (Cambess.) H.Hara
  • Ludwigia uruguayensis var. major (Hassl.) Munz

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.