Specimen Information

Trapa bispinosa var. iinumai
Trapa bispinosa var. iinumai
(water chestnut)
Plants
Exotic

Specimen ID1884237
GroupPlants
GenusTrapa
Speciesbispinosa
Varietyiinumai
Common Namewater chestnut
StateVA
CountyFairfax
LocalityHuntsman Lake. Shoreline of lake. Walk to end of boat ramp (off Golden Ball Tavern Ct.) and follow shoreline to the right.
Mapping AccuracyAccurate
HUC8 NameMiddle Potomac-Anacostia-Occoquan
HUC8 Number02070010
HUC10 NamePohick Creek
HUC10 Number0207001004
HUC12 NamePohick Creek
HUC12 Number020700100401
Map
Collection Day1
Collection Month8
Collection Year2025
Year AccuracyActual
Statusestablished
CommentsLess than 5 percent coverage. Treatments to begin August and continue bimonthly as needed through October. Late season treatments due to contractual difficulties.
Record TypeNAS sighting report
VerifierIan Pfingsten
Photo
Trapa bispinosa var. iinumai
Trapa bispinosa var. iinumai
Trapa bispinosa var. iinumai


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. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [4/16/2026].

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.