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

12 results for Alternanthera philoxeroides (alligatorweed)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1725678 CALos Angeles0.2 mile north of flood gates of Whittier Narrows Dam, west of Rosemead Blvd. south of San Gabriel Blvd. east bank of the Rio Hondo, just east of Montebello.1965 18070105 Los Angeles 
1438417 CALos AngelesE of Montebello, N of Whittier Narrows Dam on E bank of Rio Hondo.1965 18070105 Los Angelesestablished
1438335 CALos AngelesSan Gabriel River watershed: Whittier Narrows.1965 18070105 Los Angelesestablished
1438198 CALos AngelesSan Gabriel Valley, Rio Hondo River, in the Whittier Narrows1965 18070105 Los Angelesestablished
1438382 CALos AngelesSan Gabriel Valley, Whittier Narrows1965 18070105 Los Angelesestablished
1438199 CALos AngelesSan Gagriel River watershed: Whittier Narrows (El Monte 7.5' Q.)1965 18070105 Los Angelesestablished
247658 CALos AngelesWhittier Narrows1965 18070105 Los Angelescollected
247659 CALos AngelesWhittier Narrows, Rio Hondo, Whittier1965 18070105 Los Angelescollected
234411 GABullochGeorgia Southern College campus, growing in pond by Carruth Building1965 03060203 Canoocheeestablished
1725600 MSForrest2 mi N Hattiesburg on Hwy 111965 03170005 Lower Leaf 
1725606 MSLafayetteMinnow's Inc. 12.5 mi N of Oxford1965 08030201 Little Tallahatchie 
1725616 MSWashingtonLake Washington 23 mi S of Greenville1965 08030209 Deer-Steele 

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. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/22/2026].

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