Castilleja pilosa is a species of Indian paintbrush known by the common name parrothead Indian paintbrush. It is native to the western United States from California to Wyoming, where it grows in mountain and plateau habitat across the Great Basin and surrounding regions. It is known from sagebrush scrub to high mountains in alpine climates. This wildflower is a perennial herb growing upright or along the ground with hairy stems up to about 35 centimeters long. It is quite variable in appearance. The inflorescence is made up of layers of greenish, purplish, or pink bracts sometimes edged in white. Between the bracts bloom the pouched yellow-green flowers with protruding stigmas. This wildflower is a perennial herb growing upright or along the ground with hairy stems up to about 35 centimeters long. It is quite variable in appearance. The inflorescence is made up of layers of greenish, purplish, or pink bracts sometimes edged in white. Between the bracts bloom the pouched yellow-green flowers with protruding stigmas. Varieties: There are several varieties of this species:C. p. var. longispica (longspike Indian paintbrush) - limited to Idaho, Montana, and WyomingC. p. var. pilosa - limited to California, Oregon, and NevadaC. p. var. steenensis (Steens Indian paintbrush) - endemic to Oregon