Calycoseris wrightii, commonly known as White tackstem, is an annual spring wildflower, one of two species in the genus Calycoseris; the other species is C. parryi, the Yellow tack-stem. They are part of the sunflower family. White tackstem is found in the southwestern United States and northwestern Mexico in California, Nevada, southwestern Utah (Washington County), New Mexico, Arizona, northern Baja California, Sonora, western Texas (El Paso County). United States Department of Agriculture .