Invasive SpeciesPurple loosestrife

Lythrum salicaria
FOUND by 72hm75
E. Waterboro
ID Confirmed
Quality checked by pparent
Peer reviewed by
Field Notes
Group Field Notes Our group in the past, had gone outside on the Massabesic Campus looking to see if Lythrum Salicaria spread, and it has not. This time we went outside to see if Lythrum Salicaria had started to grow in the area we were checking,and yes in fact it did. In my group we really didn't assign roles we ideally, just shared roles and helped one another and did what we could. It was chilly outside, it was 52 degrees fahrenheit and 11 degrees celsius! It was really muddy and watery where our plant is, there was a lot of vegetation and weeds. Our plant wasn’t submerged in water because there was no ponds there were just puddles. The Loosestrife had a quite a few holes in the leaves, the leaves were hairy, the stem was hairy and the stem was a square shape. Our leaves were a spear-shape. The leaves had an opposite pattern. There was most likely Galerucella eating our Loosestrife because of the holes in the leaves. The area was a giant open field, with power lines. There was also a trail for snowmobiles and four wheelers. 72hm75, 72cm76,72jm74,72cm73
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Well first it has a square stem,tiny little hairs and if you look close you can see holes in the actual leaves from the galerucella.
Photo of my evidence.
This picture shows the arrangement of the leaves and again the square stem.
Photo of my evidence.
This shows the flower and the shape of them the flowers kinda go to the top in a pointy shape.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Lythrum salicaria
Common name:
Purple loosestrife
Count of individuals: 
Less than 1/4 covered
Flower (plants)
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 43.571620 °
W -70.705470 °
Observation Site Information
A photo of our study site.
Upland - Field
Trip Information
CMP powerlines
Trip date: 
Wed, 2012-10-17 05:02
Town or city: 
E. Waterboro
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
6 different species
Evidence of vectors: 
Dirt road
Recent disturbance
Snowmobiles and Atvs
Tree canopy cover: 
Soil moisture: 


Our Group had already done a loosestrife research before. We know that it is not loosestrife, but it still hasn't been reviewed. We would love it if you could review that investigation too because we would love to figure out what plant we found! Thanks! :)

-72hm75, 72cm76, 72cm73, 72jm74

Our group was really happy when we discovered the loosestrife! Thank You for looking at our work!
We will keep you updated! :)

I'm impressed with your new Field Mission to raise and release Galerucella at this site next year. I hope you keep us posted about the changes that happen once loosestrife has a beetle around to keep it in check. It's awesome to have the pre-release so well documented with your great photo and written evidence. Nicely done, scientists!

Thanks we will most certainly keep you posted with any updates.

Nice work! It is often difficult to identify plants once the are senescing. Great identifying photos and field description. Good work!

Thank you! We made sure we took our time to guarantee that we had lythrum salicaria and 72cm76 was taking her time to take the best picture she could and they came out pretty good they showed all the details. It was hard because when we first started out we were not 100% sure because of the different colors but after we looked at the leaves the tiny hairs the stem we are 100% sure that it was lythrum salicaria. :)