Invasive SpeciesJapanese barberry

Berberis thunbergii
NOT FOUND by fblock3
ID Confirmed
Quality checked by Other students
Peer reviewed by Other students
Field Notes
It is cold and breezy out, with the temperature about 45 degrees. There is 1% cloud cover, and the sun is shining in certain parts with shady spots under the trees. The entrance to a building at Waynflete school is behind us, along with a green trash can next to it. There's also a walkway behind us with Granite rock slabs and cherry trees along with some other unknown tree species. We are standing in a parking lot, and to the left of us there is a blue Honda CRV. Next to the green trash can behind us, there is a drainage vent, and to the right there are 3 metal poles. In front of us, there's a mulch garden with a fence with about 6 species of plants that are unknown to us. We are 150 ft. from Storer St. in Portland Maine. The air smells fresh, and birds are chirping, along with the sounds of students talking.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
The Japanese barberry's bud structure consist of 1-3 buds attached in a chain, while the common barberry's bud structure consists of 13-21 buds attached a chain.
Photo of my evidence.
The Japanese barberry's leaf shape is a tear drop with rounded edges, and 1-1.5 cm long, while the common barberry's leaf is 2-4 cm long with toothed edges, and a scaly surface.
Photo of my evidence.
The Japanese barberry's Thorns range in size from .5-1 cm while the common barberry's thorns are 1-1.5 cm long.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Berberis thunbergii
Common name:
Japanese barberry
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.646769 °
W -70.268998 °
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: 
Open to 1/4 covered
Soil moisture: 


You guys really took care to take quality photos that demonstrated the point you were trying to get across in the evidence piece. I am excited to see a new species ID card made by your team!

Your photos are high-quality and really show what you wrote for evidence. The field notes are really detailed and really help people see the area that you found the plant. The only thing that you could have done better is not signing your name on the sketch. It takes your eye off the sketch of the plant and distracts you from what you should be looking at. Overall, you did a fantastic job and thoroughly proved your point! :)

The pictures are very good and the evidence is well written overall very good. your field notes are very good to!

The pictures shown are very detailed. This is a very good vital sign.

This is an excellent observation. It's great how you carefully laid out your case for why this is not Japanese barberry. You paid perfect attention to the details that matter when you're identifying species, and trying to distinguish one from another that is very similar.

Vital Signs should use your fab evidence photos to build a species ID card for native barberry. Would you mind if they did?

More data, please!

I really like the detail in the field notes, like saying the specific car name. The pictures are really clear. Good Work!!!!

Awesome photos guys!

I really liked how carefully you placed your ruler in your pictures. It was very clear and focused too! Great Job!