Invasive SpeciesHydrilla

Hydrilla verticillata
NOT FOUND by alekseevich1
ID Confirmed
Quality checked by Jeffrey, Tyrel
Peer reviewed by
Field Notes
It was a warm and sunny day. We could hear highway noise and see vehicles passing on the opposite side of the site. There was an athletic field in view to the right, surrounding grass was likely cut within the last 3 days. Many trees and vegetation around. Birch and perhaps willow trees. 15 to 20 degree pitch down to waters edge. No flowers present.
Supporting Evidence
Photo of my evidence.
Hydrilla is catagorized as having eight leaves per whorl. The species we found has exactly three leaves per whorl.
Photo of my evidence.
Leaves of the Hydrilla are blade like and toothed. The leaves on our sample were smooth to the naked eye.
Photo of my evidence.
Hydrilla is an invasive species and would be prevalent if found. The sample we pulled only had 3 pieces along with native grass.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Hydrilla verticillata
Common name:
Sampling method: 
Weed weasel
Photo of our sampling method.
Place Studied
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Map this species
N 44.565070 °
W -69.664670 °
Observation Site Information
A photo of our study site.
Coastal - Beach or dune
Trip Information
Johnson Pond
Trip date: 
Fri, 2017-07-28 11:30
Town or city: 
Type of investigation: 
Species and Habitat Survey
Lower Kennebec
MIDAS Code: 
Habitat Observations
Species diversity: 
Evidence of vectors: 
Paved road
Walking trail
Water temperature: 
Dissolved oxygen: 


Sorry for not replying sooner. I agree that this it NOT hydrilla. It's likely common waterweed (Elodea canadensis), a common plant in Maine inland waters. One justification for your identification is that hydrilla has 8 leaves per whorl but that's the high end of leaves per whorl for that plant. Hydrilla can have from 4 to 8 leaves per whorl and hydrilla we've seen in Maine has 5 leaves per whorl. Thanks for keeping an eye out. /John McPhedran, Maine DEP

I remembered seeing a post that was also a "NOT FOUND" hydrilla post that looked similar to your sample.
That eyesonthewater user has lots of cool observations of native species. Check it out -

Thanks for posting!!