Invasive SpeciesJapanese barberry

Berberis thunbergii
FOUND by 0310I
ID Confirmed
Quality checked by LLP
Peer reviewed by Kameron
Field Notes
Our quadrat is located in between the edge of the forest and the edge of the road. The quadrat was placed on top of arranged small rocks and small patches of pine needles and soil.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The Japanese barberry has green and red smooth oval shaped leaves. Right next to these leaves are green small fruits, these fruits are very small and attached by a thin red stem.
Photo of my evidence.
Most of the leaves are 2-4 centimeters long. Each of these leaves are a simple oval shaped that have smooth edges and no ridges. Most of the leaves are green but some are tinted red.
Photo of my evidence.
The steam has an alternated leaf arrangement. Besides for the leaves, the stem is also covered with green berries and thorns. The thorns are each divided into a small cluster of leaves.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Berberis thunbergii
Common name:
Japanese barberry
Count of individuals: 
Between 1/2 and 3/4
Fruit (plants)
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.736800 °
W -70.275500 °
Observation Site Information
A photo of our study site.
Upland - Developed areas
Trip Information
Falmouth Middle School-Upland Osprey 2015
Trip date: 
Thu, 2015-09-17 07:18
Town or city: 
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
4 different species
Evidence of vectors: 
Paved road
Tree canopy cover: 
Between 1/4 and 1/2
Soil moisture: 


Your observations were very detailed and specific and completely corresponded with your pictures. Your sketch also helped me picture the habitat you were working in, and all this information seems to be accurate according to the species ID card, and of course, the confirmation by an expert.

Yes, Japanese barberry it is. I like that you're noticing some early seasonal changes with leaves showing a red tint.

Hi 0310i,

I really love your observation - especially how you were describing what you saw not what was on the species ID card. Making careful observations is so important in science - even if you don't always see what you expect. Actually especially if you don't see what you expect! Great photos too, nice and sharp.

Keep up the good work!