Invasive SpeciesHydrilla

Hydrilla verticillata
NOT FOUND by aquatic p
ID Confirmed
Quality checked by ls
Peer reviewed by ls
Field Notes
It's Wednesday. It was raining lightly and it was overcast. There was a road with a guardrail and people walking and driving by. There were many many bugs, plants, and trees in the site. Also, there were walking trails. We were surprised that we did not find the majority of plants we were given. We ran into a problem. We had found a species that we weren't quite familiar with. It had resembled Hydrilla except it had some type of bladders. We were also searching for the Spatterdock but, we had only found a species with no wings on the stem and no heart-shaped leaves. The leaves had been oval-shaped. We had not found any species that we were assigned which is good because the Hydrilla is invasive and could overpopulate and make Long Pond not as biodiverse. We are now trying to see if Long Pond is a healthy ecosystem.
Supporting Evidence
Photo of my evidence.
We think we did not find hydrilla because this species of plant has strange bladder-like air pockets.
Photo of my evidence.
Another piece of evidence proving our point that we did not find hydrilla is this plant's leaves are feather divided - unlike hydrilla's leaves, which are tooth edged.
Photo of my evidence.
Our final piece of evidence proves that hydrilla was not found because hydrilla has blade shaped leaves and the species that we found does not really have a shape, it is more divided and feathery. After leaving the pond we had found a book and found a species called Bladderwort. The species we had found met all of the requirements that Bladderwort had.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Hydrilla verticillata
Common name:
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.476040 °
W -70.386250 °
Observation Site Information
A photo of our study site.
Freshwater - In a pond or lake
Trip Information
Long Pond
Trip date: 
Wed, 2012-05-30 09:00
Town or city: 
Type of investigation: 
Species and Habitat Survey
MIDAS Code: 
Habitat Observations
Species diversity: 
20 different species
Evidence of vectors: 
Paved road
Walking trail
Water temperature: 
Dissolved oxygen: 


It's always good news when hydrilla is NOT found. If you have time, please check in other area ponds to be sure it's not there. I agree with your identification, i.e. bladdewort (in the genus Utricularia). A note about different leaf division: bladderwort leaves are referred to as "branch divided" while milfoils are "feather divided." You can check this out for yourself at the glossary on this webpage:
Thank you for your efforts to protect lake habitat.
-John McPhedran, Maine Department of Environmental Protection

Thank you! I will be sure to keep a look out at the ponds that I visit! Also, in my free time or when I get the chance to, I will look into that glossary. I am also glad that that is not hydrilla because that would be very bad thing. Once again, thank you for commenting ad giving me more info.

Awesome photos! Aquatic plants are hard to photograph and you did an amazing job!

Thank you! My partner and I had a lot of pictures; some of them weren't that great but, a lot of them were awesome! Thank you guys for your nice comments!