Epithelantha pachyrhiza var. elongata Backeb. in Cactus (Paris) 39: 32. 1954
Epithelantha pachyrhiza var. elongata in Cactus (Paris) 39: 32. 1954
is basionym for Epithelantha pachyrhiza subsp. elongata in Piante Grasse 30: 185. 2010
Type: Mexico. Coahuila: F. Schwarz s.n., not preserved; (Lectotype: [illustration] “Fig. 17 Epithelantha pachyrhiza var. elongata Backbg. n. var.” in Backeberg, Cactus (Paris) 39: 32. 19541