Vauquelinia californica subsp. retherfordii (I.M. Johnst.) W.J. Hess & Henrickson Vauquelinia californica subsp. retherfordii (I.M. Johnst.) W.J. Hess & Henrickson in Sida 12(1): 132. 1987 sec. Villarreal-Quintanilla 2001