Specimen Information

Myriophyllum heterophyllum
Myriophyllum heterophyllum
(variable-leaf watermilfoil)
Native Transplant

Specimen ID1247742
Common Namevariable-leaf watermilfoil
LocalityBeaver Lake, Derry
Mapping AccuracyAccurate
HUC8 NameMerrimack River
HUC8 Number01070006
HUC10 NameStony Brook-Merrimack River
HUC10 Number0107000612
HUC12 NameUpper Beaver Brook
HUC12 Number010700061203
Collection Day3
Collection Month10
Collection Year2014
Year AccuracyActual
Potential Pathwayhitch hiker on small watercraft
Reference 1
Ref. Number:28625
Author:New Hampshire Department of Environmental Services.
Title:Long-term variable milfoil management plan
Publisher:Beaver Lake Improvement Association
Pages:34 pp
CommentsFragments collected by concerned lake residents trained to identify aquatic invasive plants. Found in 2015 in lake outlet wetland. "Both visual examination and DNA analysis showed that the plant was variable milfoil."
Record TypeLiterature
Earliest Recorddrainage
VerifierNH DES
Size133.6 acres
Specimen ImpactBoat traffic impediment


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Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/25/2024].

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