DOUGLAS, David, botanist, born at Scone, Perthshire, Scotland, in 1798; died in the Hawaiian Islands, 12 July 1834. He was employed in the botanic garden of the University of Glasgow, where he attracted the notice of Dr. (afterward Sir William) Hooker, who procured for him an appointment as botanical collector in the United States to the Horticultural society of London. In this capacity he traveled extensively in America, extending his researches in 1824 as far as Oregon and California, exploring Columbia River and parts of California, and in 1827 traversing the continent from Fort Vancouver to Hudson bay, where he met Sir ,John Franklin, and returned with him to England, having many valuable acquisitions for English flower gardens. After a second visit, when on a similar mission to Columbia River in 1829, he went to the Hawaiian Islands, where he was killed in 1834. Through his agency 217 new species of plants were introduced into England, and he collected 800 specimens of the California flora. A gigantic species of pine, which he discovered in California, is named Pinus Douglassii.