Hedosyne is a genus of plants in the family Asteraceae.

There is only one known species, Hedosyne ambrosiifolia, native to the southwestern United States and northern Mexico: Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Sonora, Zacatecas, New Mexico, western Texas, southern Arizona. The species is sometimes referred to by the common name ragged marsh-elder.

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