Opuntia spraguei J.G. Ortega Opuntia spraguei J.G. Ortega in Bol. Pro-Cult. Reg. 1: sine pag. 1929 sec. Guzmán & al. 2003=Opuntia tomentosa var. spraguei (J.G. Ortega) Backeb., Cactaceae (Backeberg) 1: 542. 1958 syn. sec. Guzmán & al. 2003