Invasive SpeciesOriental bittersweet

Celastrus orbiculatus
FOUND by Waltzing Matildas
ID Confirmed
Quality checked by Peoples
Peer reviewed by Waltzing Matildas
Field Notes
I believe that we've found the Oriental Bittersweet. Rough stems, red-orange roots, textured leaves, all appear to be indicative of the Oriental Bittersweet. It is growing in a forest that surrounds a small pond, in Raymond, Maine. It grows significantly more in this area than I had previously expected, with dense thickets dominating many of the flora in this small area. The vines are quite long, growing up to 3 metres long in this location. Older plants have stiffer and woody stems, whereas younger specimens have much more pliable vines. The water quality in this location was rather shabby, with muck and small plants clogging up significant portions of water surface. There is evidence of biodiversity, however in the thicket which we studied we found that the vines of the plant were killing off many other native plant species. Animals were absent from the thicket other than a small frog and occasional insects. Some of the leaves of the Bittersweet plant showed evidence of bite marks from insects and a few of the invasive plants appeared to have been eaten to death.
Supporting Evidence
Photo of my evidence.
The plant is shown here wrapping around other small woody plants, showing similar growth habits to the Oriental Bittersweet.
Photo of my evidence.
Here are the characteristically bright orange roots of one of our specimens. This seems to be solid evidence in favour of this being Oriental Bittersweet.
Photo of my evidence.
Here is another shot of the suspected Oriental Bittersweet hanging over a thicket of various ground plants.
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 43.936039 °
W -70.447731 °
Observation Site Information
A photo of our study site.
Freshwater - By water's edge
Trip Information
Frog Pond
Trip date: 
Tue, 2017-10-03 14:19
Town or city: 
Type of investigation: 
Species Survey


Most people forget that they can look at the roots. Good thinking!