Invasive SpeciesPurple loosestrife

Lythrum salicaria
FOUND by Charlotte
2014-08-22
Portland
ID Confirmed
Quality checked by Beth
Peer reviewed by
Field Notes
Square stem was noted Purple flowers are visible Evidence of spreading Evidence of some herbivory
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Evidence of square stem Evidence of purple flowers
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: 
Coverage: 
Reproduction: 
Vegetative structures (plants)
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.647300 °
Longitude: 
W -70.260770 °
Observation Site Information
A photo of our study site.
Habitat: 
Upland - Developed areas
Trip Information
Name:
Under the Bridge, Commercial Street
Trip date: 
Fri, 2014-08-22 10:00
Town or city: 
Portland
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Upland
Watershed: 
Presumpscot
Habitat Observations
Species diversity: 
10 different species
Evidence of vectors: 
Boat ramp
Boats
Paved road
People
Construction
Cargo containers
Tree canopy cover: 
Soil moisture: 
Saturated

Comments

You found loosestrife. Good time of year to find it with those beautiful flowers. Square stems and purple flowers are good characteristics to identify loosestrife but don't be folded. There is at least one look alike called American Germander that has a very similar purple flower and a square stem.

Your picture shows those flowers with 5-7 flat petals is what convinced me that this was Lythrum salicaria. Good work.

Most impressed by your gravity defying observation. Wow! Keep looking around.

sali