The original tree was grown from a seed planted around 1925 on the property of Mrs. Victor Mell of Miami, Florida. For the following decades 'Palmer' 's parentage was unknown, however a 2005 pedigree analysis estimated 'Palmer' was a seedling of 'Haden'. The variety was first propagated in 1945 and officially named in 1949. It gained some commercial acceptance in Florida and is still grown on a limited commercial basis in the state today, as well as areas outside the United States such as Africa and Australia.
'Palmer' trees are planted in the collections of the USDA's germplasm repository in Miami, the University of Florida's Tropical Research and Education Center in Homestead, Florida, and the Miami-Dade Fruit and Spice Park, also in Homestead.
The fruit is large, with especially big specimens reaching several pounds in weight. Coloration tends to be yellow with red blush when ripe; the fruit will turn purple long before becoming mature, sometimes leading to immature fruits being picked. The flesh is orange-yellow and has a mild and aromatic flavor, with minimal fiber, and contains a monoembryonic seed. It ripens from July to early September in Florida, making it a late-season cultivar.
'Palmer' trees are moderately vigorous growers and have upright canopies.
- http://www.ars-grin.gov/cgi-bin/npgs/acc/display.pl?1665345 USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN). [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland.
- http://trec.ifas.ufl.edu/crane/pdfs/TREC-Fruit-Collections.pdf Page 3, #76
- Campbell, Richard J. (1992). A Guide to Mangos in Florida. Fairchild Tropical Garden. p. 137. ISBN 0-9632264-0-1.