Alternanthera philoxeroides
Alternanthera philoxeroides
(alligatorweed)
Plants
Exotic
Collection Info
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Species Profile
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Impacts

19 results for Alternanthera philoxeroides (alligatorweed)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1725679 CALos Angeles15416 Placed Drive, La Mirada.1963 18070106 San Gabriel 
247666 CALos AngelesBaldwin Park Blvd (City of Industry)1970 18070106 San Gabrielcollected
1438378 CALos AngelesBaldwin Park Blvd at Walnut Creek and E to the RR. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
1725579 CALos AngelesBonelli Regional Park; cove on the S side of Puddingstone Reservoir.1990 18070106 San Gabriel 
247664 CALos AngelesBrea Canyon Freeway1970 18070106 San Gabrielcollected
1438193 CALos AngelesBrea Canyon Freeway project, stockpiled sand from Whittier Narrows. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
1438330 CALos AngelesBrea Canyon Freeway project, stockpiled sand from Whittier Narrows. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
1438412 CALos AngelesBrea Canyon Freeway project, stockpiled sand from Whittier Narrows. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
1438376 CALos AngelesBrea Canyon Freeway project, stockpiled sand from Whittier Narrows. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
247656 CALos AngelesLong Beach1960 18070106 San Gabrielcollected
247667 CALos AngelesPuddingstone Reservoir1970 18070106 San Gabrielcollected
233995 CALos AngelesPuddingstone Reservoir1990 18070106 San Gabrielestablished
1438315 CALos AngelesPuddingstone Reservoir SP, Gate #6 S, East Shore, San Dimas Ave. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
1438232 CALos AngelesPuddingstone Reservoir SP, Gate #6 S, East Shore, San Dimas Ave. Detection report only, no confirming specimen.1970 18070106 San Gabrielestablished
247683 CALos AngelesSan Dimas, Boneli Regional Park, on S side of Puddingstone Reservoir1990 18070106 San Gabrielestablished
1725671 CALos AngelesSan Dimas, Bonelli Regional Park, cove on south side of Puddingstone Reservoir1990 18070106 San Gabriel 
1725663 CALos AngelesSan Dimas, Bonelli Regional Park, edge of reservoir1990 18070106 San Gabriel 
1438798 CALos AngelesSan Gabriel Valley, San Dimas, Boneli Regional Park, on south side of Puddingstone Reservoir1990 18070106 San Gabrielestablished
230302 CALos Angelesten townships in southeastern Los Angeles County1996 18070106 San Gabrielestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are 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 data.

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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. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/10/2025].

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