Specimen Information

Pistia stratiotes
Pistia stratiotes
(water lettuce)
Plants
Cryptogenic
Collection Info
Point Map
Species Profile
Animated Map
Impacts

Specimen ID1670500
GroupPlants
GenusPistia
Speciesstratiotes
Common Namewater lettuce
StateAZ
CountyPima
LocalityEastern most pond at Sweetwater Wetlands
Mapping AccuracyAccurate
HUC8 NameUpper Santa Cruz
HUC8 Number15050301
HUC10 NameJulian Wash-Santa Cruz River
HUC10 Number1505030109
HUC12 NameArroyo Chico-Santa Cruz River
HUC12 Number150503010906
Map

NAS ARM
Collection Day15
Collection Month9
Collection Year2021
Year AccuracyActual
Potential Pathwayplanted ornamental
Statusunknown
CommentsPhotos below are after an extensive, but unsuccessful removal project
Record TypeNAS sighting report
Earliest Recorddrainage
VerifierIan Pfingsten
Freshwater/MarineFreshwater
Number Collected5000
Photo
Pistia stratiotes
Pistia stratiotes
Pistia stratiotes

Disclaimer:

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].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.