Myriophyllum heterophyllum
Myriophyllum heterophyllum
(variable-leaf watermilfoil)
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Native Transplant
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190 results for Myriophyllum heterophyllum (variable-leaf watermilfoil)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1891204 NHBelknap[No locality description provided]2025 01070001 Pemigewasset River 
1890329 NHBelknap[No locality description provided]2025 01070002 Winnipesaukee River 
234924 NHBelknapAlton town, Lake Winnipesaukee, south end of Alton Bay at Rt. 11 bridge1985 01070002 Winnipesaukee Riverestablished
254755 NHBelknapBarnstead Parade Pond, Suncook River, near Barnstead2003 01070006 Merrimack Riverestablished
256341 NHBelknapBarnstead Parade Pond, Suncook River, near Barnstead2008 01070006 Merrimack Riverestablished
1256819 NHBelknapBarnstead Parade Pond/Suncook River2003 01070006 Merrimack Riverestablished
1256753 NHBelknapBrindle Pond2002 01070006 Merrimack Riverestablished
254743 NHBelknapBrindle Pond, Barnstead2002 01070006 Merrimack Riverestablished
1256782 NHBelknapHalfmoon Pond2006 01070006 Merrimack Riverestablished
254773 NHBelknapHalfmoon Pond, Barnstead1999 01070006 Merrimack Riverestablished
261486 NHBelknapHalfmoon Pond, Barnstead2008 01070006 Merrimack Riverunknown
1256793 NHBelknapLake Pemigewasset2007 01070001 Pemigewasset Riverestablished
254765 NHBelknapLake Pemigewasset, Meredith1999 01070001 Pemigewasset Riverestablished
256313 NHBelknapLake Pemigewasset, Meredith2008 01070001 Pemigewasset Riverestablished
1633825 NHBelknapLake Waukewan1981 01070002 Winnipesaukee Rivereradicated
254607 NHBelknapLake Winnipesaukee1970 01070002 Winnipesaukee Riverestablished
232129 NHBelknapLake Winnipesaukee1983 01070002 Winnipesaukee Riverestablished
256316 NHBelknapLake Winnipesaukee2008 01070002 Winnipesaukee Riverestablished
229884 NHBelknapLake Winnipesaukee, in protected coves and bays at Alton, Center Harbor, Meredith, Gilford, and Moultonboro.1989 01070002 Winnipesaukee Riverestablished
262429 NHBelknapLake Winnipesaukee, in protected coves and bays at Alton, Center Harbor, Meredith, Gilford, and Moultonboro.2009 01070002 Winnipesaukee Riverestablished
1256769 NHBelknapLocke Lake1989 01070006 Merrimack Riverestablished
254616 NHBelknapLocke Lake, Barnstead1990 01070006 Merrimack Riverestablished
256333 NHBelknapLocke Lake, Barnstead2008 01070006 Merrimack Riverestablished
229887 NHBelknapOpechee Bay, Laconia1989 01070002 Winnipesaukee Riverestablished
254610 NHBelknapOpechee Bay, Laconia1990 01070002 Winnipesaukee Riverestablished
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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. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/22/2026].

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