Cyperus duripes I.M. Johnst. Cyperus duripes I.M. Johnst. in Proc. Calif. Acad. Sci., ser. 4, 20: 54. 1931 sec. González-Elizondo & al. 2018=Mariscus duripes (I.M. Johnst.) Conz., Fl. Tax. Mex. 2: 236. 1943 syn. sec. Diego & González 2008