Phyllocactus ruestii Weing. in Monatsschr. Kakteenk. 24: 123. 1914
Phyllocactus ruestii in Monatsschr. Kakteenk. 24: 123. 1914
is basionym for Epiphyllum strictum var. ruestii, Cacti, ed. 1: 359. 1937
is basionym for Epiphyllum ruestii, Kaktus-ABC: 163. 1936 ["1935"]
Type: not designated