Agave ferdinandi-regis A. Berger Agave ferdinandi-regis A. Berger, Agaven: 90. 1915 sec. Espejo-Serna & López-Ferrari 2008=Agave victoriae-reginae var. laxior A. Berger, Hort. Mortol.: 364. 1912 syn. sec. Espejo-Serna & López-Ferrari 2008