Myriophyllum spicatum

Eurasian Watermilfoil
Myriophyllum spicatum

*Invasive

Herbarium mounts:

Amos Lake 2020 (1)

Amos Lake 2020 (2)

Amos Lake 08/23/2022
Amos Lake 08/22/2024
Amston Lake 08/21/2025
Ball Pond 08/17/2005
Bantam Lake 08/29/2019

Baterson Park Pond 08/13/2004

Beaver Pond (Meriden) 08/01/2013

Beseck Lake 06/22/2004

Beseck Lake 06/24/2004

Beseck Lake 06/21/2011

Beseck Lake 07/21/2011
Beseck Lake 06/09/2023
Beseck Lake 06/23/2025
Black Pond 06/18/2015

Branford Water Supply Pond 08/01/2005

Bunnells Pond 06/30/2011

Burr Pond (1) 07/25/2005

Burr Pond (2) 07/25/2005

Candlewood Lake 06/21/2005

Candlewood Lake 08/27/2009

Candlewood Lake 08/25/2011

Candlewood Lake 09/13/2011

Candlewood Lake 09/06/2012

Candlewood Lake 06/13/2014

Candlewood Lake 08/27/2015
Candlewood Lake 09/01/2015

Candlewood Lake 09/03/2016

Candlewood Lake 08/25/2017
Candlewood Lake 09/08/2019
Candlewood Lake 09/11/2020
Candlewood Lake 08/29/2022
Connecticut River 08/19/2020

Coventry Lake (1) 07/09/2008

Coventry Lake (2) 07/09/2008

Crystal Lake (Middletown) 08/08/2004

Dayton Pond 07/08/2005

Dog Pond 08/05/2005

Dog Pond 10/04/2013

Dooley Pond 06/18/2004

Dooley Pond 06/16/2015
Elise Lake 07/19/2023

Fall Mountain Lake 09/15/2009

Fisher Meadows Recreation Area 07/26/2005
Fox Hill Lake 07/03/2025

Gables Pond 08/03/2009

Grannis Lake 08/23/2011
Green Pond 08/30/2022
Hamburg Cove 06/18/2024

Hamlin Pond 08/24/2005

Hatch Pond 10/03/2005

Hatch Pond 06/12/2012

Highland Lake (Winchester) 09/14/2004

Highland Lake (Winsted) (1) 09/09/2004

Highland Lake (Winsted) (2) 09/09/2004

Highland Lake (Winsted) 07/05/2012

Housatonic Lake 07/05/2005

Housatonic Lake 07/21/2017
Housatonic Lake 06/29/2022
Housatonic Lake 06/28/2023
Housatonic Lake 10/02/2024
Housatonic Lake 06/25/2025

In Cultivation at Puppy Center and Aquarium 01/07/2011

Kenosia Lake 08/03/2004

Lillinonah Lake (1) 07/10/2007

Lillinonah Lake (2) 07/10/2007

Lillinonah Lake 08/17/2010

Lillinonah Lake 08/10/2011

Lillinonah Lake 08/10/2012

Lillinonah Lake 08/25/2013

Lillinonah Lake 08/07/2014

Lillinonah Lake 09/01/2015

Lillinonah Lake 08/31/2016
Lillinonah Lake 09/06/2018
Little Pond 07/17/2024
Long and Bush Ponds 07/24/2024
Long Pond 07/20/2020

Lower Broad Brook Reservoir 09/12/2012

Lower Mill Pond (1) 07/27/2005

Lower Mill Pond (2) 07/27/2005

Lower Pond 09/13/2006

Lucky Pond 07/08/2005
Lucky Pond 07/29/2022

Mackenzie Reservoir 06/30/2005

Mamanasco Lake 08/15/2005

Mamanasco Lake 09/07/2012

Mudge Pond 09/17/2015
North Farms Reservoir 09/04/2020

Pachaug Pond 09/07/2017
Pachaug Pond 08/01/2019
Pachaug Pond 08/23/2018
Pachaug Pond 08/17/2020
Pachaug Pond 07/12/2021
Pachaug Pond (1) 07/21/2022
Pachaug Pond (2) 07/27/2022
Pachaug Pond 08/09/2023
Pachaug Pond 08/01/2024
Pachaug Pond 08/12/2025

Paderewski Park Pond 08/24/2005
Pecausett Pond 06/25/2024
Phipps Lake 06/05/2018

Pistapaug Lake 06/28/2005
Popes Pond 07/12/2021

Private Pond (Pawcatuck) 06/29/2011

Putnam Park Pond 09/26/2011

Route 7 Pond (Wilton) 08/09/2013

Quassapaug Lake (1) 07/25/2011

Quassapaug Lake (2) 07/25/2011

Quonnipaug Lake 06/16/2004

Quonnipaug Lake 07/09/2010

Quonnipaug Lake 07/21/2011

Quonnipaug Lake 06/22/2015
Quonnipaug Lake 07/12/2018
Quonnipaug Lake 06/29/2020

Saltonstall Lake 07/21/2004

Silver Lake 07/01/2004

Squantz Pond 07/14/2011

Squantz Pond 08/13/2015

Squantz Pond 08/02/2016

Squantz Pond 08/01/2017
Squantz Pond 08/09/2018
Squantz Pond 08/18/2020

Taunton Lake 06/08/2009

Taunton Lake 06/16/2010

Taunton Lake 06/25/2014

Taunton Lake 06/14/2017
Taunton Lake 06/12/2019
Taunton Lake (1) 07/12/2022
Taunton Lake (2) 07/12/2022

Timber Lake 09/07/2006

Timber Lake 09/12/2013

Twin Lake North 07/03/2012

Twin Lake North 07/05/2013
Twin Lake North 09/11/2018

Twin Lake South 07/05/2012
Twin Lake South 09/13/2018

Tyler Lake 08/16/2011

Tyler Lake 08/30/2013

Ulbrich Reservoir 07/18/2005

Upper Broad Brook Reservoir 09/12/2012

Waubeeka Lake 09/28/2005

West Side Pond 09/12/2005

West Side Pond 08/29/2012
Wononpakook Lake 08/31/2023

Wononscopomuc 09/16/2004

Wononscopomuc Lake 07/10/2012

Zoar Lake (1) 08/15/2007

Zoar Lake (2) 08/15/2007

Connecticut State The Connecticut Agricultural Experiment Station

Eurasian Watermilfoil Myriophyllum spicatum

Eurasian Watermilfoil
Myriophyllum spicatum