Parthenium is a genus of North American annuals, biennials, perennials, subshrubs, and shrubs in the tribe Heliantheae within the family Asteraceae and subfamily Asteroideae.

[6][7][8] The name is possibly derived from the Greek word παρθένος (parthenos) which means "virgin".

[11] These include:[3] In North America, the Jicarilla Apache people used Parthenium incanum for medicine (Opler 1946: 8).

The sap of guayule (P. argentatum) is a source of natural rubber.

[12] Parthenium hysterophorus is a common invasive species in India, Australia, and parts of Africa.