The United States Lighthouse Tender Dahlia was a lighthouse tender serving on the Great Lakes. The first Great Lakes tender to be specifically built for that purpose, she was built in 1874 by Neafie & Levy and placed into commission at Detroit. The ship was refitted in 1881, and again in 1891.On 5 May 1909 she was sold to E.W. Seymour, of Chicago, and rebuilt as passenger and freight carrier, and rechristened the Flora M.