New England, which we gratefully acknowledge. Nancy Murray and Chuck Lee of the DEP's lakes program also made important comments

that

improved

presentationoftheinformationinthisguide.Additional information

was

obtained

from

theagencies

whose web pages

are cited

on

theprevious page.

Ref

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Bugbee, G.J.,J.C.White. 2005. Control of

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Catling,P.M.,andI. Dobson. 1985.

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FA.

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Crow,GE., andHellquist,C.B. 2000a.AquaticandWetlandPlantsof NortheasternNorth America.Vol. 1.Pteridophytes,

Gymnosperms

and Angiosperms: Dicotyledons. University ofWisconsinPress,Madison.

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Kozlowski,S.J. 1991.

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Godfrey, R.K.,andJ.W.Wooten. 1981.AquaticandWetlandPlantsof SoutheasternUnitedStates.Dicotyledons. University ofGeorgiaPress, Athens.

Groth,A.T., L.Lovett-DoustandJ.Lovett-Doust. 1996. Population density and

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inTrapa natans(Trapaceae), an annual, clonal aquatic macrophyte.

American

JournalofBotany 83:1406-1415.

Hellquist,C.B.,andJ.Straub. 2002.

A

guidetoselectedinvasive non-native aquatic speciesinMassachusetts.MassachusettsDepartmentof

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Hofstra,D.E.,J.Clayton,J.D.

Green

and

M.

Auger. 1999.Competitive performanceof Hydrillaverticillata in

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roleof recreationalboattrafficinterlakedispersalofmacrophytes:

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introduced aquaticmacrophyte,Myriophyllumspicatwn,as habitat for fishandtheirinvertebrate prey. CanadianJournal of

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M.A.

ClelandandJ.D. Gabel. 1997. Hydrilla verticilla(Hydrocharitaceae)inConnecticut. JournalofAquaticPlant

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118:389-396.

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