Myriophyllum heterophyllum
Myriophyllum heterophyllum
(variable-leaf watermilfoil)
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Native Transplant
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1857 results for Myriophyllum heterophyllum (variable-leaf watermilfoil)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1888547 CAPlumas[No locality description provided]2024 18020123 Middle Fork Feather 
232138 CTFairfieldBunnells Pond, Bridgeport1932 01100006 Saugatuckestablished
254810 CTHartfordManitook Lake, Granby2004 01080207 Farmington Riverestablished
234911 CTHartfordWindsor, unspecified1988 01080207 Farmington Riverestablished
1890741 CTLitchfield[No locality description provided]2025 01100005 Housatonic 
260596 CTLitchfieldBurr Pond, Torrington, Burr Mountain Rd/Rt.82005 01080207 Farmington Riverestablished
234917 CTLItchfieldHighland Lake, Winchester town, north end of lake in area west of the boat launch1996 01080207 Farmington Riverestablished
274886 CTLitchfieldIndian Lake, Sharon, CT. Growing in 1.5 m of water2009 01100005 Housatoniccollected
274889 CTLitchfieldMerriman Pond, Watertown, CT. Growing on silt in 15 cm of water.2005 01100005 Housatoniccollected
242047 CTLitchfieldNorthfield Pond1999 01100005 Housatonicestablished
242046 CTMiddlesexBashan Lake1998 01080205 Outlet Connecticut Riverestablished
242040 CTMiddlesexCedar Lake N. to mouth of Snake River1976 01080205 Outlet Connecticut Riverestablished
252904 CTMiddlesexHayward Lake (Lake Hayward), East Haddam2005 01080205 Outlet Connecticut Riverestablished
242039 CTMiddlesexKillingworth Reservoir1969 01100004 Quinnipiacestablished
274887 CTMiddlesexLowe Moodus Reservoir, East Haddam, CT. Growing in 1 m of water2009 01080205 Outlet Connecticut Rivercollected
242048 CTMiddlesexMesserschmidt Pond1999 01080205 Outlet Connecticut Riverestablished
232137 CTMiddlesexMiddlesex County1983 01080205 Outlet Connecticut Riverestablished
242041 CTMiddlesexMoodus Reservoir, near E. Haddam1986 01080205 Outlet Connecticut Riverestablished
234910 CTMiddlesexMoodus Reservoir, near E. Haddam1996 01080205 Outlet Connecticut Riverestablished
234901 CTMiddlesexPattaconk Lake (Russell Jennings Pond)2001 01080205 Outlet Connecticut Riverestablished
234914 CTNew HavenGuilford, lake, unspecified1998 01100004 Quinnipiacestablished
234928 CTNew HavenLong Meadow Pond, Middlebury town2000 01100005 Housatonicestablished
234919 CTNew HavenQuinnipaug Lake, cove area at north end of pond1993 01100004 Quinnipiacestablished
234927 CTNew HavenQuonnipaug Lake, Guilford town2000 01100004 Quinnipiacestablished
254815 CTNew HavenQuonnipaug Lake, Guilford town2004 01100004 Quinnipiacestablished
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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.

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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 [12/4/2025].

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