Specimen Information

Myriophyllum heterophyllum
Myriophyllum heterophyllum
(variable-leaf watermilfoil)
Plants
Native Transplant
Collection Info
Point Map
Species Profile
Animated Map

Specimen ID1658235
GroupPlants
GenusMyriophyllum
Speciesheterophyllum
Common Namevariable-leaf watermilfoil
StatePA
CountyWayne
LocalityGouldsboro Lake in Gouldsboro State Park
Mapping AccuracyAccurate
HUC8 NameLehigh
HUC8 Number02040106
HUC10 NameUpper Lehigh River
HUC10 Number0204010602
HUC12 NameHeadwaters Lehigh River
HUC12 Number020401060201
Map

NAS ARM
Collection Day30
Collection Month7
Collection Year2021
Year AccuracyActual
Potential Pathwayhitch hiker on small watercraft
Statusestablished
CommentsPlant is growing prolifically in entire waterbody. Herbicide treatment in August 2021.
Record TypeNAS sighting report
Earliest Recordcounty
DisposalTreated
VerifierIan Pfingsten
Freshwater/MarineFreshwater
Number Collected10000
Photo
Myriophyllum heterophyllum
Myriophyllum heterophyllum

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 [12/29/2025].

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.