Wright fishhook cactus, Sclerocactus wrightiae, is a Federally listed endangered plant that occurs in Emery County, Sevier County, and Wayne County, Utah. A member of the cactus family, this species is a perennial herb with a solitary, hemispheric, ribbed, 6 to 12 cm tall stem that produces nearly-white to pink flowers from late April through May. Wright fishhook cactus is found in soils that range from clays to sandy silts to fine sands, typically in areas with well developed biological soil crusts. Wright fishhook cactus grows in salt desert shrub and widely scattered pinyon-juniper communities, at elevations ranging from 1305 to 1963 meters. This species and its habitat are vulnerable to disturbance from domestic livestock grazing, to mineral resource development, and to off-road vehicle use.