Lopezia is a genus of plants of the family Onagraceae, largely restricted to Mexico and Central America.

Stamens 2, adnate to the style and connate with each other at the base, the posterior fertile, the anterior sterile, petaloid.

Ovary 4-loculed; style short, filiform, with slightly enlarged and barely lobed stigma; ovules multiseriate, many.

[3] The genus name of Lopezia is in honour of Manuel López-Figueiras (1915-2012), who was a (Spanish-) Venezuelan botanist (Mycology and Lichenology), from the University of Havana (in Cuba).

[4] It is found in Costa Rica, El Salvador, Guatemala, Honduras, Mexico and Panamá.