Cylindropuntia molesta (K. Brandegee) F.M. Knuth subsp. molesta Cylindropuntia molesta (K. Brandegee) F.M. Knuth subsp. molesta, Kaktus-ABC: 126. 1936 sec. Guzmán & al. 2003=Grusonia molesta (Brandegee) G.D. Rowley in Tephrocactus Study Group 12: 44. 2006 syn. sec. Rowley 2006