Georges Rouy (2 December 1851, Paris – 25 December 1924, Asnières-sur-Seine) was a French botanist who was among the first to identify infraspecific (i.e., below the level of species) taxa, including: subspecies, varieties, and forms.
With Julien Foucaud and others, he was author of the Flore de France; ou, Description des plantes qui croissent spontanément en France, en Corse et en Alsace-Lorraine (Flora of France; descriptions of plants that are native to France, Corsica and Alsace-Lorraine, published in 14 volumes from 1893 to 1913. His other principal works include:
Rouy was the binomial author of many botanical species. In 1901 the genus Rouya was named in his honor by Auguste Henri Cornut de Coincy. His name is also associated with plants having the especific epithets of rouyi, rouyana and rouyanum, some examples being: Allium rouyi, Armeria rouyana, and Clinopodium rouyanum.