Invasive SpeciesJapanese barberry

Berberis thunbergii
FOUND by fblock4
ID Confirmed
Quality checked by peers
Peer reviewed by
Field Notes
It is May 14th, 8:25am and about 45 degrees fahrenheit. There is 0% cloud coverage with a light breeze. The ground is dry and we are surrounded by granite slabs. It's sunny but there is shade under the pine trees. We are near a paved pathway in a small groove. There is sparse grass coverage and pine needles on the ground. We are near Storer St. and can hear cars passing by. We are looking at a Berberis thunbergii's and we have noticed that the leaves they produce are rounded leaf points. They have smooth edges and a simple shape. The woody sprigs have alternating leafs and small red berries. There are white flower buds near the leaves. The bush is about 1-2 meters, thorns 1/2 cm, berries 1-2cm and leaves about 1-2.5 cm.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The leaves on the Japanese Barberry are oval shaped and the edges are rounded. They're are about 2-4 inches long.
Photo of my evidence.
The thorns are located 1 in every little cluster of leaves and the stem has a zig-zag pattern.
Photo of my evidence.
Small white flowers on this plant bloom in april-may, and then turn into berries. The berries are 1-2 cm long and the flowers are1 cm, you can see the berries from the last season, they are wrinkled and dry.
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: 
Flower (plants)
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
We’re sorry, JavaScript is required to view the map. If JavaScript is you may wish to upgrade to a newer browser in order to view this map.
Map this species
N 43.646569 °
W -70.268861 °
Observation Site Information
A photo of our study site.
Upland - Developed areas
Trip Information
Waynflete School campus
Trip date: 
Mon, 2013-05-13 12:30
Town or city: 
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
Evidence of vectors: 
Paved road
Tree canopy cover: 
Between 1/4 and 1/2
Soil moisture: 


You nailed it! Species found.

I appreciate all of the evidence you provided, including the berries from last season. It is a real treat when you're trying to identify plants when you have both flowers AND berries to look at.

I wonder why this plant wasn't picked clean of berries this winter....

I'm also impressed with your sketch and will nominate it for the Best Of page! (

Thanks, fblock4!