Molecular phylogenetics
Within family Crassulaceae, "Orostachys" is placed in tribe Telephieae of subfamily Sempervivoideae. The genus has. at times, included "Meterostachys". Molecular phylogenetics shows that the genus is not monophyletic, but polyphyletic relative to paraphyletic "Hylotelephium". Its circumscription, therefore, is unstable and subject to revision.