Juan Ismael Calzada is a Mexican botanist and collector. Dr Calzada is credited with the discovery of the elm Ulmus ismaelis, named in his honour.
Partial works
- El estropajo. Xalapa Instituto Nacional de Investigaciones sobre Recursos Bioticos. 1982. INIREB informa 52
The standard author abbreviation Calzada is used to indicate this individual as the author when citing a botanical name.