| Abstract | Parthenium is a genus of North American shrubs in the sunflower tribe within the daisy family.
The name Parthenium is derived from either the Greek word παρθένος (parthenos), meaning "virgin," or παρθένιον (parthenion), an ancient name for a plant.
Members of the genus are commonly known as feverfew. Notable species include Guayule (P. argentatum) which has been used as a rubber substitute, especially during the Second World War; and also P. hysterophorus, a serious invasive species in the Old World.
Species
Parthenium alpinum (Nutt.) Torr. & A.Gray – Arkansas River Feverfew - NM CO WY
Parthenium argentatum A.Gray – Guayule - TX, Coahuila, Guanajuato, Nuevo León, San Luis Potosí, Zacatecas
Parthenium cineraceum Rollins - Bolivia, Paraguay
Parthenium confertum A.Gray – Gray's Feverfew - AZ NM TX Chihuahua, Coahuila, Nuevo León, San Luis Potosí, Querétaro, Tamaulipas
Parthenium fruticosum Less. - from Tamaulipas to Chiapas
Parthenium hysterophorus L. – Santa Maria Feverfew, Whitetop Weed - widespread in North + South America
Parthenium incanum Kunth – Mariola - NV UT AZ NM TX Chihuahua, Coahuila, Durango, Hidalgo, Nuevo León, San Luis Potosí, Zacatecas
Parthenium integrifolium L. – American Feverfew, Wild Quinine - from TX to MA + MN
Parthenium ligulatum (M.E. Jones) Barneby – Colorado Feverfew - CO UT
Parthenium rollinsianum Rzed. - San Luis Potosí
Parthenium schottii Greenm. ex Millsp. & Chase - Yucatán
Parthenium tomentosum DC. - Oaxaca, Puebla
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