Invasive SpeciesEurasian watermilfoil

Myriophyllum spicatum
NOT FOUND by Dunham Strong
ID Confirmed
Quality checked by Dunham Strong
Peer reviewed by qawilson
Field Notes
Outside on a beautiful sunny day. There are lots of green plants, ducks around the pond, feel slight wind, Hear traffic, brown murky water, smell fresh air and pond water. We think that Rollo Pond is not at risk from invasive plants because there is not much human/boat traffic that would transfer species.
Supporting Evidence
Photo of my evidence.
It did not have feathery looking leaves. It was not on a stalk. There was no stem or branches. It was solid bright green- no pinkish white or reddish stems.
Photo of my evidence.
More long wispy threads instead of actual branches.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Myriophyllum spicatum
Common name:
Eurasian watermilfoil
Sampling method: 
Weed weasel
Photo of our sampling method.
Place Studied
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Map this species
N 44.664910 °
W -70.146290 °
Observation Site Information
A photo of our study site.
Freshwater - In a developed area
Trip Information
Rollo Pond UMF
Trip date: 
Tue, 2017-08-15 11:30
Town or city: 
Type of investigation: 
Species and Habitat Survey
Lower Kennebec
MIDAS Code: 
Habitat Observations
Species diversity: 
1 different species
Evidence of vectors: 
Paved road
Walking trail
Water temperature: 
Dissolved oxygen: 


Greetings Dunham Strong,

My apologies for the delay in reviewing your Vital Signs submission. I have been out working on lakes! You are quite right that the bright green stuff in your photo is NOT Eurasian milfoil. It looks like you found some cyanobacteria (commonly known as "blue-green algae.")

Cyanobacteria are a group of photosynthetic, nitrogen-fixing bacteria. Some species, such as the one you found, form soft hair-like filaments comprised of single cells joined end to end. Some species have gas vesicles that allow them to regulate buoyancy and to migrate up and down throughout the water column. Cyanobacteria are naturally occurring in most Maine lakes, and are vital components of lake ecosystems. Some cyanobacteria produce harmful toxins.

I enjoyed reading your observations from your visit to Rollo Pond. Please keep up the great work, keeping a watchful eye out for aquatic invaders.

All the best,

Roberta Hill
Invasive Species Program Director
Maine Volunteer Lake Monitoring Program

It is very helpful that you provided several photos of you sample from several different perspectives. Great demonstration of evidence.