Erigeron divergens is known by the common names diffuse daisy and spreading fleabane. It is native to western North America, including the western half of the United States, British Columbia and Alberta in Canada, and Baja California, Chihuahua, Durango, Nuevo León, and Sonora in Mexico.
This plant occurs in many types of habitat, including desert shrublands and scrubs, grassland, meadows, pinyon-juniper woodland, oak and pine woodlands, riparian habitat, sagebrush, and disturbed areas.
This plant is highly variable in form. It is an annual or perennial herb growing from a taproot and sometimes a caudex. It produces one to many stems 7 to 70 centimeters tall. It is a hairy plant, and the hairs are usually glandular, at least near the top of the stem. The basal leaves are 1 to 7 centimeters long, and leaves higher on the stem are smaller. The inflorescence can hold over 100 flower heads. The heads have 75 to 150 ray florets not more than a centimeter long which are white in color, fading purple. There are many yellow disc florets at the center. The fruit is about one millimeter long.
The species exhibits agamospermy, asexual reproduction via seeds. Many, but not all, individuals are polyploid.
The Navajo people used it as an aid in childbirth, as a lotion, an eyewash, and a treatment for snakebite and headache. It was a good luck charm among the Kiowa people.