Checklist of the genus Quercus (Fagaceae) of Aguascalientes, México

Twenty-five species of Quercus were collected in the state of Aguascalientes, 11 members of Quercus sect. Lobatae (red oak) and 14 members of Quercus sect. Quercus (white oak). Ten species were newly recorded. Quercus potosina is the commonest and most widely distributed species in the state. Eight species were found only in a single municipality, Calvillo or San José de Gracia. The species of Quercus are mainly distributed in oak and pine-oak forest in the western part of Aguascalientes. The municipalities with the greatest numbers of species are San José de Gracia, Calvillo and Jesús María, while Aguascalientes, Asientos, Cosío, El Llano, Rincón de Romos, Pabellón de Arteaga, and Tepezalá have the fewest representatives. San Francisco de los Romo is the only municipality without any Quercus records