
(species Gymnocladus dioica), plant of the pea family (Fabaceae), native in North American woods from New York and southern Ontario to Oklahoma. In ...
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http://www.britannica.com/eb/a-z/k/22

(Gymnocladus) These hardy, deciduous trees are slow-growing and pest resistant. There are two varieties, the most common one will be described next. C. dioica, commonly known as the Kentucky Coffee Tree, is originally from North America. It is said that the Indians and early immigrants at one time roasted and ground the large seeds to make a bitter...
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http://www.encyclo.co.uk/local/10004

The Kentucky Coffee Tree (Gymnocladus dioicus) is a North American leguminous tree, the seeds of which can be used as a substitute for coffee.
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http://www.probertencyclopaedia.com/browse/BK.HTM

[
n] - handsome tree of central and eastern North America having large bipinnate leaves and green-white flowers followed by large woody brown pods whose seeds are used as a coffee substitute
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http://www.webdictionary.co.uk/definition.php?query=Kentucky%20coffee%20tre

a tall North American tree, Gymnocladus dioica, of the legume family, the seeds of whichwere formerly used as a substitute for coffee beans.
Found on
https://www.infoplease.com/dictionary/kentucky-coffee-tree
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