Scopulophila rixfordii is a species of flowering plant in the pink family (Caryophyllaceae) known by the common name Rixford's rockwort. It is native to the deserts of eastern California, Nevada, and probably Arizona, where it grows in rocky habitat, including sheer limestone cliffs and canyons. It produces a branching stem 10 to 30 centimeters long which anchors to its substrate by a taproot. It has areas of woolly fibers on the stem but is mostly hairless. There are small, fleshy green leaves with linear or lance-shaped blades oppositely arranged along the stem. Each is accompanied by a small, pointed stipule. Flowers occur in the leaf axils and are solitary or arranged in small clusters. The flowers have no petals but thin white sepals with thin membranous edges.