Hydrilla verticillata
Hydrilla verticillata

88 results for Hydrilla verticillata (hydrilla)
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Click here for listing in all states

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
890424 MDAlleganyJust a few feet past the swimming buoy rope in Lake Habeeb, Rocky Gap State Park2015 02070002 North Branch Potomacestablished
1320964 MDAlleganyLake Habeeb. Rocky Gap State Park2014 02070002 North Branch Potomacestablished
1409955 MDAlleganyRocky Gap State Park2016 02070002 North Branch Potomacestablished
1409993 MDAlleganyRocky Gap State Park (Lake Habeeb)2015 02070002 North Branch Potomacestablished
1409957 MDAlleganyRocky Gap State Park (Lake Habeeb)2015 02070002 North Branch Potomacestablished
1655046 MDBaltimoreBaltimore County, MD, USA2020 02060003 Gunpowder-Patapscoestablished
1428121 MDBaltimoreBird River2017 02060003 Gunpowder-Patapscoestablished
1428102 MDBaltimoreBird River2017 02060003 Gunpowder-Patapscoestablished
1428114 MDBaltimoreBird River2017 02060003 Gunpowder-Patapscoestablished
1428109 MDBaltimoreBird River2017 02060003 Gunpowder-Patapscoestablished
1428122 MDBaltimoreBird River2017 02060003 Gunpowder-Patapscoestablished
892665 MDBaltimoreLoch Raven Reservoir, in cove2015 02060003 Gunpowder-Patapscoestablished
1654940 MDBaltimoreSaltpeter Creek, Baltimore, MD, US2019 02060003 Gunpowder-Patapscoestablished
233803 MDBaltimore/HarforGunpowder River2000 02060003 Gunpowder-Patapscoestablished
232111 MDBaltimore-Harfortidal tributaries of the Gunpowder-Patapsco watershed2000 02060003 Gunpowder-Patapscoestablished
1634130 MDCalvertCocktown Creek at Kings Landing Park2016 02060006 Patuxentestablished
1654897 MDCarrollEldersburg, MD, USA2018 02060003 Gunpowder-Patapscoestablished
232121 MDCarrollPiney Run Reservoir1998 02060003 Gunpowder-Patapscoestablished
1655034 MDCecilAtlantic Ocean, North East, MD, US2020 02060002 Chester-Sassafrasestablished
232117 MDCecilBohemia River2000 02060002 Chester-Sassafrasestablished
1655030 MDCecilConowingo Lake Rd, Conowingo, MD, US2020 02050306 Lower Susquehannaestablished
232116 MDCecilElk River2000 02060002 Chester-Sassafrasestablished
1409954 MDCecilElk River, just north of Welch Point and Back Creek2015 02060002 Chester-Sassafrasestablished
1409940 MDCecilElk River, just north of Welch Point and Back Creek2015 02060002 Chester-Sassafrasestablished
232115 MDCecilNortheast River2000 02060002 Chester-Sassafrasestablished

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.


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. [2021]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/28/2021].

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 queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.