Invasive SpeciesPurple loosestrife

Lythrum salicaria
FOUND by WickedMonkeys
ID Confirmed
Quality checked by Ms. Fitz
Peer reviewed by
Field Notes
We are collecting data to see if we can find purple loosestrife, an invasive species. We are behind the Freeport Middle School, near a small stream. Many browned and dry plants surround us. The air is a crisp 42°F and slightly windy. A paved road next to us leads to a small parking lot. On the other side of the stream is a sparse forest. We can hear muffled conversation from other students and the whizzing of cars on the highway. I was surprised by what I found because the purple loosestrife plant was taller than I thought. The stem also had many other stems branching off of it, while I was expecting a single stem. The loosestrife was harder to find than I thought it would be.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Purple loosestrife has square stems, so we observed the plant we found, and the stem was square. The stem was also covered with small hairs, which matched our description. The plants themselves can grow up to 2 meters, and the stem measured 1.18 meters tall.
Photo of my evidence.
Clusters of seed pods found all around the purple loosestrife stem, and the pods were dried up and brown. The pods were like rough skin wrapping around the seed inside. The pods were grouped in bunches of two to three.
Photo of my evidence.
The leaves were arranged opposite to each other. The leaves are 6 cm long when we uncrumpled them. The leaves were oval shaped, with smooth edges. The leaf shape was simple.
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: 
Fruit (plants)
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.864019 °
W -70.104661 °
Observation Site Information
A photo of our study site.
Upland - Developed areas
Trip Information
Freeport Middle School
Trip date: 
Fri, 2018-11-09 07:09
Town or city: 
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
7 different species
Evidence of vectors: 
Paved road
Tree canopy cover: 
Open to 1/4 covered
Soil moisture: 
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