The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Ludwigia grandiflora
Ludwigia grandiflora
(large-flower primrose-willow)

Copyright Info
Ludwigia grandiflora (Michx.) Greuter & Burdet

Common name: large-flower primrose-willow

Synonyms and Other Names: Ludwigia grandiflora ssp. hexapetala, Ludwigia hexapetala, Ludwigia uruguayensis, Jussiaea grandiflora

Taxonomy: available through www.itis.govITIS logo

Native Range:
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Ludwigia grandiflora are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
AL198819881Upper Black Warrior
AR198820157Arkansas-White-Red Region; Bodcau Bayou; Lower Little Arkansas; Lower Ouachita-Bayou De Loutre; Lower Sulpher; Upper Beaver; Upper Saline
CA194020157Lower Klamath; Russian; San Diego; San Francisco Bay; Santa Clara; Santa Margarita; Tomales-Drake Bays
DE199319952Brandywine-Christina; Broadkill-Smyrna
FL201720202Kissimmee; Santa Fe
GA198720202Lower Chattahoochee; Lower Flint
KY198820112Lower Cumberland; Red
LA1986201921Atchafalaya; Atchafalaya - Vermilion; Bayou Teche; Boeuf; Boeuf-Tensas; Calcasieu-Mermentau; East Central Louisiana Coastal; Eastern Louisiana Coastal; Lake Maurepas; Lake Maurepas; Lower Calcasieu; Lower Mississippi; Lower Mississippi Region; Lower Mississippi-New Orleans; Lower Ouachita; Lower Red-Ouachita; Lower Sabine; Mermentau; Vermilion; West Central Louisiana Coastal; West Fork Calcasieu
MS198220094Deer-Steele; Escatawpa; Luxapallila; Upper Tombigbee
MO199719971Lower Osage
NC196620194Contentnea; Haw; Lower Cape Fear; Upper Tar
OK198119811Arkansas-White-Red Region
OR194919933Lower Columbia-Clatskanie; Siuslaw; Upper Willamette
PA194119772Lower Delaware; Schuylkill
SC1938201913Broad-St. Helena; Cooper; Lake Marion; Lower Broad; Lower Catawba; Lower Savannah; North Fork Edisto; Salkehatchie; Saluda; South Carolina Coastal; Tyger; Upper Broad; Wateree
TN196819882Lower Cumberland; Lower Cumberland-Sycamore
TX198120183Lower Brazos; Lower Neches; Lower Trinity
VA199019972Potomac; Powell
WA199520052Duwamish; Lower Columbia-Clatskanie

Table last updated 7/25/2021

† Populations may not be currently present.

* HUCs are not listed for states where the observation(s) cannot be approximated to a HUC (e.g. state centroids or Canadian provinces).

References: (click for full references)

Nesom, G.L. and J.T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea. 65(2): 123-125.

Wagner, W.L., P.C Hoch and P.H. Raven 2007. Systematic Botany Monographs: Revised Classification of the Onagraceae. 83: 243 pp.

Zardini, E. M., H. Gu & P. H. Raven 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Systematic Botany. 16(2): 242–244.

Zardini, E.M., H. Gu, and P.H. Raven. 1992. Erratum: on the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Systematic Botany. 17(4): 692.

Revision Date: 8/15/2009

Citation Information:
U.S. Geological Survey, 2021, Ludwigia grandiflora (Michx.) Greuter & Burdet: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=253, Revision Date: 8/15/2009, Access Date: 7/25/2021

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2021]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/25/2021].

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