Dillenius, Johann Jakob (dĭlāˈnēəs) [key], 1687–1747, English botanist, of German birth. He published catalogs of the plants of Eltham, Kent, and of Geissen, Germany, and a work on mosses that placed him in the first rank among botanists of his day. A genus of tropical trees, Dillenia, was named after him by Linnaeus.
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