Opuntia chlorotica Engelm. & Bigelow Opuntia chlorotica Engelm. & Bigelow in Proc. Amer. Acad. Arts 3: 291. 1856 sec. Hunt 2016=Opuntia palmeri Engelm. ex J.M. Coult. in Contr. U.S. Natl. Herb. 3: 423. 1896 syn. sec. Guzmán & al. 2003