Cotyledon filicaulis Eckl. & Zeyh., Enum. 307. (1837). Adromischus filicaulis (Eckl. & Zeyh.) C.A. Sm. in Bothalia 3: 630 (1939). A. mammillaris (L.f.) Lem. var. filicaulis (Eckl. & Zeyh.) Jacobsen, Sukk. Lex. 29 (1970), nomen non rite publicatum quoad sine typo. Cotyledon fusiformis Rolfe in Kew Bull. 1916: 229 (1916). Adromischus fusiformis (Rolfe) Berger in Naturl. PflFam. edn 2, 18a: 416 (1930). A. mammillaris (L.f.) Lem. var. fusiformis (Rolfe) Jacobsen, Sukk. Lex. 29 (1970), nomen non rite publicatum quoad sine typo. Type: Cape, sine loc. exact., Pearson 5585 (K, holo.!). Adromischus mammillaris (L.f.) Lem. var. rubra V. Poelln. in Desert PI. Life 10: 112, one fig. (1938); in Reprium nov. Spec. Regni veg. 40: 109 (1940). A. klei-nioides C.A. Sm. in Bothalia 3: 631 (1939). Type: Cur-tis's bot. Mag. 99, t. 6020 (1873). A. fragilis P.C. Hutch, in Cactus Succ. J., Los Ang. 31: 167 (1959). Type: Cape, Richtersveld, Hellsberg, Rodin 1620 (BOL, hole!) — var. numeesensis P.C. Hutch, in Cactus Succ. J., Los Ang. 31: 169 (1959). Type: Cape, Richtersveld, Numees, Hall in NBG 692/53 (BOL, holo.!; PRE).