Schoenocrambe argillacea
 Schoenocrambe argillacea (syn. Hesperidanthus argillaceus) is a rare species of flowering plant in the mustard family known by the common names clay reed-mustard Uinta Basin plainsmustard and clay thelypody. It is endemic to Utah in the United States where it is known only from Uintah County. It is threatened by oil and gas exploration in its habitat.