The main square, Place Denfert-Rochereau, is planted with trees, mostly horse chestnuts, maples, and locusts, and there are three named green spaces within it as well: Square Abbé Migne, Square Jacques Antoine, and Square Claude Nicolas Ledoux.
In 1900 it was reported that the value of Robinia pseudoacacia was practically destroyed in nearly all parts of the United States beyond the mountain forests which are its home by locust borers which riddle the trunk and branches.
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As a young man, Abraham Lincoln spent much of his time splitting rails and fence posts from black locust logs.