Kentucky Coffee Tree
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Image from NasserHalaweh under the CC BY-SA 4.0 license
Names
Gymnocladus dioicus, American coffee berry, Kentucky Mahogany, Nicker Treet, Stump Tree
Description
Tree grows up to one hundred feet. Branches are either thick and blunt or slender branchlets which bloom. Leaves are large and bipinnate and emerge late in the spring. Bark is ash colored and flakey. Flowers are green / white and fruit is a hard shelled bean.

Image from Cillas under the CC BY-SA 4.0 license
Concern Level
Only during drought conditions, unpalatable.
Toxic Parts
Leaves, seeds and pulp

Image from Gerd Eichmann under the CC BY-SA 4.0 license
Symptoms
Occur within one hour of ingestion and include Gastrointestinal upset, diarrhea, high blood pressure, depression, depression of respiratory system, paralysis, convulsions, death.
Danger
Uncertain toxin can be fatal.

Image from Bruce Marlin under the CC by 3.0 license<
More Information
*It should be noted that we are not veterinarians. This information is written specifically for horses and should be used for reference purposes only. If you think your horse has eaten something toxic call your vet right away.
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1 comment
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Evedene Bennett
The Kentucky Coffee Bean tree is also a colonizer. I loved the tall shade, the gorgeous fall colors, BUT – sprouts started coming up all over my & my neighbor’s lawns & flower beds. At first we pulled them. Then resorted to poisons that only killed the sprout, not the root.. They were not seedlings – but from the roots, like locust & aspen.
I finally sadly had them cut down. But that only made the problem worse. Five years later they continue. Just back from a 3 week vacation there are actually hundreds! – some already 2 feet tall. And I haven’t been able to find anyone who can tell me how to stop it.! People should be warned. This is in Oregon where plants flourish, but his is monstrous. I hope you can help. My neighbors now hate me.