Invasive SpeciesBrazilian waterweed

Egeria densa
NOT FOUND by mharvey
ID Confirmed
Quality checked by HeronThere
Peer reviewed by
Field Notes
It is a warm and sunny day. I hear traffic noise. I notice a person sitting on a dock across the pond.
Supporting Evidence
Photo of my evidence.
The strands were less than 1/2 meter, and Brazilian waterweed typically has stems 2 meters long and over.
Photo of my evidence.
Even though the plant that we found had whorled leaves, we don't think it is Brazilian waterweed because it had 3 leaves per whorl. Brazilian waterweed usually has 4 leaves.
Photo of my evidence.
The plant that we found had smooth, blade shaped leaves. Brazilian waterweed has rough, elliptical leaves.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Egeria densa
Common name:
Brazilian waterweed
Sampling method: 
Weed weasel
Photo of our sampling method.
Place Studied
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Map this species
N 44.565140 °
W -69.664510 °
Observation Site Information
A photo of our study site.
Freshwater - In a pond or lake
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: 


Your description of the leaf, their arrangement, and the total number of leaves per whorl certainly suggests that this aquatic plant is NOT Egeria densa. By your description I believe it to be a very common native plant - Elodea Canadensis.
Nice job!

Freshwater plants are hard to get good photos of. I nice thing to use is a white plastic tub with some water in it. Here is an example I saw on the "Best of VS" page -

Hope you enjoyed a beautiful day being on the look out for invasives!