The old official state tree was the Kentucky coffee tree (Gymnocladus dioicus.) The tulip tree (Liriodendron tulipifera) is the current official state tree. The change was made in 1976.
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Kentucky was a popular hunting ground for the Shawnee and Cherokee Indian nations prior to being settled by white settlers.
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The song "Happy Birthday to You" was the creation of two Louisville, Kentucky sisters in 1893.