The second USS Suwannee and third USS Mayflower was a United States Lighthouse Board, and later United States Lighthouse Service, lighthouse tender loaned to the United States Navy in 1898 for service as an auxiliary cruiser during the Spanish-American War and from 1917 to 1919 for service as a patrol vessel during World War I. She also served the Lighthouse Board and in the Lighthouse Service as USLHT Mayflower from 1897 to 1898, from 1898 to 1917, and from 1919 to 1939, and in the United States Coast Guard as the first USCGC Mayflower (WAGL-236) in 1939 and from 1940 to 1943 and as USCGC Hydrangea (WAGL-236) from 1943 to 1945.