Synonyms: Conophyllum angustifolium; Conophyllum clivorum (homotypic); Conophyllum cognatum; Conophyllum compactum; Conophyllum compactum var. eenrietense; Conophyllum framesii; Conophyllum hallii; Conophyllum herrei; Conophyllum marlothianum; Conophyllum niveum; Conophyllum ripense; Conophyllum vanheerdei; Mesembryanthemum clivorum (homotypic); Mesembryanthemum cognatum; Mitrophyllum angustifolium (homotypic); Mitrophyllum cognatum; Mitrophyllum compactum (homotypic); Mitrophyllum compactum var. eenrietense (homotypic); Mitrophyllum framesii; Mitrophyllum hallii (homotypic); Mitrophyllum herrei (homotypic); Mitrophyllum karrachabense; Mitrophyllum marlothianum (homotypic); Mitrophyllum niveum; Mitrophyllum ripense (homotypic); Mitrophyllum schickianum; Mitrophyllum tenuifolium; Mitrophyllum vanheerdei (homotypic); Schwantesia clivora (homotypic); Schwantesia cognata