Hydrilla verticillata
Hydrilla verticillata

14 results for Hydrilla verticillata (hydrilla)
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Specimen IDCommon NameStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
877579 monoecious hydrillaCTFairfieldCrystal Lake (Held Pond)2009 01100006 Saugatuckestablished
877578 monoecious hydrillaCTFairfieldSilvermine River2007 01100006 Saugatuckestablished
270050 monoecious hydrillaCTFairfieldSilvermine River2009 01100006 Saugatuckestablished
1523973 hydrillaCTHartford[Keeney Cove]2016 01080205 Lower Connecticutestablished
1322352 hydrillaCTHartfordConnecticut River, at Riverfront Park and Boathouse ramp, Glastonbury2016 01080205 Lower Connecticutestablished
1633925 hydrillaCTHartfordConnecticut River, Glastonbury2017 01080205 Lower Connecticutestablished
1523972 hydrillaCTHartfordCT-3 S [Keeney Cove]2016 01080205 Lower Connecticutestablished
1633926 hydrillaCTMiddlesexConnecticut River, Haddam2018 01080205 Lower Connecticutestablished
1633927 hydrillaCTMiddlesexConnecticut River, Middletown2018 01080205 Lower Connecticutestablished
1409798 monoecious hydrillaCTNew HavenHilltop Rd., small shallow pond near road2005 01100005 Housatonicunknown
228833 monoecious hydrillaCTNew LondonMason Island, three miles from the Mystic site.1987 02030203 Long Island Soundestablished
877577 monoecious hydrillaCTNew LondonMystic Seaport pond at intersection of Rossie and Greenmanville2005 01100003 Thamesestablished
229183 monoecious hydrillaCTNew LondonMystic, pond located near a major tourist attraction with an outlet to a salt water river1996 01100003 Thamesestablished
879785 monoecious hydrillaCTTollandCoventry Lake [Wangumbaug Lake], Coventry town2015 01100002 Shetucketestablished

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 [1/22/2021].

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.