Perityle emoryi is a species of flowering plant in the Asteraceae (Sunflower) family known by the common name Emory's Rockdaisy. It is native to the southwestern United States and northern Mexico, where it is a common wildflower of the deserts and can also be found in coastal regions. It grows in many types of habitat, it tolerates disturbance, and it can become somewhat weedy. The plant is also known from Chile and Peru and it is an introduced species in parts of Hawaii. Its distribution is apparently expanding. This polyploid plant is quite variable genetically and in appearance. It is an annual herb growing 2 to 60 centimeters tall, its stem small, delicate, and simple, or thick, branching, and sprawling. It is usually hairy in texture. The alternately arranged leaves have blades of various shapes which are toothed or divided into lobes and borne on petioles. The flower head is a typical composite "flower", hemispherical to bell-shaped and generally no more than a centimeter wide. The head has a center of many golden disc florets and a fringe of 8 to 12 white ray florets each just a few millimeters long. The fruit is an achene, usually with a pappus at the tip.