William Dunlop Brackenridge (1810-1893) was a gardener and nurseryman from Scotland who came to the United States in 1837. When Asa Gray resigned his position as Botanist for the United States Exploring Expedition of 1838-1842, William Rich, the Assistant Botanist, took his place and Brackenridge was appointed to fill Rich's place. When the expedition returned in 1842, Brackenridge was entrusted with the care of the living plants and also with the report on ferns collected by the expedition. In 1855 he moved to the Baltimore area and spent the rest of his life there as a nurseryman and landscape architect.
