Graziela Maciel Barroso (1912-2003) was a Brazilian botanist noted for being a leading expert on the flora of Brazil, as well as a specialist of Compositae.
She was Chairman and Professor of the Department of Plant Biology at the University of BrasĂlia, and published the three-volume Sistemática de Angiospermas do Brasil.
Barroso identified over one hundred species, and two bromelieads have been named in her honor: Tillandsia grazielae and Tillandsia barrosoae.
The standard author abbreviation G.M.Barroso is used to indicate this person as the author when citing a botanical name.