Invasive SpeciesOriental bittersweet

Celastrus orbiculatus
FOUND by BlueHillGardener
Seal Harbor
ID Questioned
Quality checked by Kathleen Burgess
Peer reviewed by
Field Notes
On Sunday I returned to Acadia to walk a different trail and look for invasive plants. I chose the Seaside Trail which was described as easy. I left from the Jordan Pond area and walked through forest, crossed a carriage trail, more forest, under one of the beautiful granite bridges near the Stanley Brook Road, and onto Seaside Lane in Seal Harbor. I found bittersweet and barberry; there was also lots of bittersweet across from the ocean beach in Seal Harbor
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Leaves are glossy, almost round.
Photo of my evidence.
Leaves have long pointed tips and edges are finely toothed. Vine is smooth and green when young.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Celastrus orbiculatus
Common name:
Oriental bittersweet
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 44.297966 °
W -68.244273 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
MDI -- Seaside Trail
Trip date: 
Sun, 2011-07-31 09:50
Town or city: 
Seal Harbor
Type of investigation: 
Species Survey
Eastern Coastal
Time of low tide: 


You had a good idea about Bittersweet, but we didn't think that the plant was Bittersweet. We noticed that the berries on the leaves were a different shape then what Bittersweet has and also the berries on Bittersweet are yellow and red and your plant didn't have those colors. But otherwise your information was really good.

Thank you,
-Penguinos (:

The arrangement of those seeds caught my attention. They don't look quite right for Oriental bittersweet. If someone in the VS community knows something about American bittersweet, please chime in with some details about the slight differences between the species.

This spring when looking at some bittersweet I used this .pdf to help me id what I was looking at as Oriental bittersweet: Identifying Bittersweet.pdf

I agree that the fruit arrangement doesn't seem quite right here.

The link only works if you select the whole link through the .pdf and copy it and past into your browser. Sorry. It is a handy guide made by the USGS.