Marian "Clover" Hooper Adams (September 13, 1843 – December 6, 1885) was an American socialite, active society hostess and arbiter of Washington, D.C., and an accomplished amateur photographer. She was the wife of Henry Adams, historian.
Marian was the youngest of three children born to Robert William Hooper and Ellen Surgis Hooper. Her family was a wealthy and prominent Bostonian family. Her father was a surgeon and her mother a poet. She was called "Clover" by friends and family.
She married Henry Adams on June 27, 1872 in Boston. After they settled in Boston, their home became a gathering place for the city's intellectuals. When they moved to Washington, DC, their home across from the White House in Lafayette Square became the center of the city's social scene.
Clover became interested in photography in the mid-1880's and kept careful notes about her darkroom and the people she photographed. Her work chronicled life in Washington, DC and the place of women in the later years of the 19th century. While she was greatly admired for her photography, her husband refused to allow her to become professional and discouraged the publication of her photos.
Clover committed suicide by ingesting potassium cyanide in December, 1885, just a few months after her father had died. After her death, her husband commissioned sculptor Augustus Saint-Gaudens and architect Stanford White to create a memorial to mark her grave in Rock Creek Cemetery. The haunting Adams Memorial is probably the most famous of all monuments in the cemetery and is generally considered to be Saint-Gaudens' most famous sculpture.