Invasive SpeciesBlack swallowwort

Cynanchum louiseae
FOUND by sniffly salamander
Cape Elizabeth
ID Confirmed
Quality checked by sniffly
Peer reviewed by
Field Notes
The gardens at Fort Williams are looking awesome. They have done so much work over the last few years to clean out invasives and replant with natives. As we were walking along the path over the holiday I noticed that invasives are coming back. It was a reminder to me that the work is never finished. I'm hoping to find out if there are any volunteer opportunities. I want to help maintain the beauty and support the hard work that's been done.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
You can see that the leaves are opposite, simple, and smooth. The leaves also have that darkish green color that I think is characteristic of this species.
Photo of my evidence.
There were no flowers but it looked like there were buds. Since the specimen wasn't in bloom it's hard for me to compare to the flowers of black swallowwort. I hope to return to the plants in the near future.
Photo of my evidence.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Cynanchum louiseae
Common name:
Black swallowwort
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.624686 °
W -70.209607 °
Observation Site Information
A photo of our study site.
Upland - Developed areas
Trip Information
Fort Williams
Trip date: 
Mon, 2015-05-25 12:15
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey


You are correct, that is black swallowwort - nice job identifying this troublesome species. They sure are working hard at Fort Williams and I know the Fort Williams Foundation would welcome your help.