Waltheria operculata Rose Waltheria operculata Rose in Contr. U.S. Natl. Herb. 5(4): 183. 1899 sec. Diego-Pérez 2011=Turnera valleana Standl. & L.O. Williams in Ceiba 1(2): 88. 1950 syn. sec. Saunders J. G. 1993