Heliopsis annua is a species of flowering plant in the family Asteraceae. It is widespread across much of northern and central Mexico from Chihuahua and Coahuila as far south as Puebla and Michoacán.Article: El género Heliopsis (Heliantheae; Asteraceae) en México y las alcamidas presentes en sus raíces, Journal: Acta Botánica Mexicana 2004 (69:115-131), Authors: | Abraham García | Enrique Ramírez | Jorge Molina | in Spanish with English summary; color photos of leaves of several species on page 119, photos of achenes on page 120Hemsley, William Botting. 1881. Biologia Centrali-Americana :zoology, botany and archaeology 2(8): 156 in Latin
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Photo of herbarium specimen collected in Nuevo León in 1989