Erigeron neomexicanus, the New Mexico fleabane, is a plant species native to New Mexico, Arizona, Sonora, and Chihuahua. It occurs in open sites in grasslands or woodlands, at elevations of 900–3000 m (3000–9000 m). Erigeron neomexicanus is a perennial herb with a fairly large taproot. Leaves are fairly large and oblanceolate, with pinnate lobes, the basal leaves up to 6 cm (2.4 inches) long. Cauline (stem) leaves progressively smaller higher up the stem. Ray and disc flowers are both white.