Robert Sturtevant (1892–1955) was an American landscape architect and iris breeder. He taught for many years at the Lowthorpe School of Landscape Architecture, and he helped to found the American Iris Society.
Robert Swan Sturtevant was born in Framingham, Massachusetts, in 1892, the only child of noted agronomist Edward Lewis Sturtevant, the first director of the New York State Agricultural Experiment Station, and his second wife, Hattie (Mann) Sturtevant. He had four half-siblings from his father's first marriage to Hattie's sister Mary Elizabeth (Mann) Sturtevant.
Sturtevant was especially close to his much older half-sister Grace, who would become a noted iris breeder. In 1901, they co-purchased an estate in Massachusetts, Wellesley Gardens, which Grace made the center of her iris-breeding operations and where she educated her half-brother in horticulture.
Sturtevant attended Wellesley High School and Milton Academy. He graduated from Harvard College with an A.B. in 1912 and went on to get a master's degree in landscape architecture from Harvard in 1916. Between 1916 and 1918, he worked as a landscape architect for the firm of Frederick Law Olmsted.
When America entered World War I, he served overseas in the field artillery, reaching the rank of corporal. After his discharge in 1919, he became an instructor at the Lowthorpe School of Landscape Architecture. In 1927, he became the school's director. Although he only headed the school for a few years, he remained on the faculty for 25 years.
When the American Iris Society was founded in 1920, Sturtevant became its first secretary and drafted the society's constitution. He also served as the first editor of the American Iris Society Bulletin, a position he held for 14 years. He edited the AIS's first book, The Iris: An Ideal Hardy Perennial (1947).
Sturtevant was a member of both the Royal Horticultural Society of Great Britain and the American Horticultural Society.