Invasive SpeciesBeach rose

Rosa rugosa
ID Confirmed
Quality checked by pparent
Peer reviewed by pparent
Field Notes
My class and I went on a field trip on June 9th to Fortune's Rock located in Biddeford Pool. While walking up the road, not a far distance from the beach, I spotted Beech Rose in front of a house. I saw this because of the large woody stem and the large purple leaves. As the sight was beautiful, I started to see these flowers EVERYWHERE. As I looked at the stems more, they were green and brown in some spots. The thorns were many and needle sharp, maybe hundreds of them were on the stem. As I kept looking at this plant, I became more interested. I decided to do an investigation.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
As I was taking pictures of this beautiful plant, I saw the stem. Now the stem, like all roses, has thorns. But this dark wooded stem has just about hundreds of needle sharp thorns. As the Beach rose has a thick circular wooded stem, so does this plant.
Photo of my evidence.
I snapped a shot of the flower and the stigma of the flower. The stigma was about an inch in circumference and was a brownish-yellow color. The flower had about 9 or 10 bright purple petals.
Photo of my evidence.
The leaves on this aggressive plant are many, and they are compound pinnate with 5-9 leaflets. The leaves have an oval shape to them, and they are a shiny type of green. The leaves have short, soft hairs on the bottoms.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Rosa rugosa
Common name:
Beach rose
Is it alive?: 
All alive
Count of individuals: 
Between 1/4 and 1/2
Flower (plants)
How big is it?: 
Greater than 10 cm
Is it male or female?: 
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.426307 °
W -70.376571 °
Observation Site Information
A photo of our study site.
Coastal - Beach or dune
Trip Information
Biddeford Pool/Fortune's Rock
Trip date: 
Tue, 2011-05-31 08:10
Town or city: 
Type of investigation: 
Species and Habitat Survey
Time of low tide: 
Habitat Observations
Species diversity: 
30 different species
Evidence of vectors: 
Seeds being blown by the wind
Water temperature: 
Dissolved oxygen: 


Between the description of the thorns on the stem and the photos of the flowers and the ways that the leaves grow on the stem, I think I could identify this plant from this blog.

Way to go!

Tsuga belgradensis