Reasons: Common in TX, NM, AZ and northern Mexico.
Range Extent Comments: AZ (Cochise Co.), western TX (Trans-Pecos and Plains Country); northern Mexico (Sonora, Chihuahua, Coahuila, Nuevo Leon, Durango, Zacatecas).
Population Size Comments: Very abundant in Trans-Pecos deserts and rare in east to west part to Plains Country.
Global Range: AZ (Cochise Co.), western TX (Trans-Pecos and Plains Country); northern Mexico (Sonora, Chihuahua, Coahuila, Nuevo Leon, Durango, Zacatecas).
Basic Description: Plant, shrub, Asteraceae.
Habitat Comments: Plains and mesas, often on limestone, 3500-5000 ft in AZ.