Petradoria is a genus of North American subshrubs in the tribe Astereae within the family Asteraceae. The only known species is Petradoria pumila, known by the common name rock goldenrod. It is native to the western United States (California, Arizona, Nevada, Utah, New Mexico, Colorado, Wyoming, Idaho). It is quite common in some regions, carpeting areas in yellow blooms. Petradoria discoidea L.C.Anderson - Cuniculotinus gramineus (H.M.Hall) Urbatsch, R.P.Roberts & Neubig