Citation
Unknown. “Mr. Swingle crossing the Dancey tangerine with pollen of the Bowen grapefruit in March, 1897, at Eustis, Fla. The Sampson tangelo, first one made, resulted from this cross..” Special Collections, USDA National Agricultural Library. Accessed February 19, 2026, https://www.nal.usda.gov/exhibits/speccoll/items/show/296.
An official website of the United States government.
