I can't begin to tell you how mixed up this genus is. Then there is this list from 'The Plant List', what they list as accepted species is in bold type.
Name ---- Status ------ Confidence level ------ Source
Orostachys aggregata (Makino) H. Hara Accepted M TRO
Orostachys aliciae (Raym.-Hamet) H. Ohba Synonym M TRO
Orostachys boehmeri (Makino) Hara Unresolved L WCSP (in review)
Orostachys cartilaginea V.N. Boriss. Accepted M TRO
Orostachys chanetii (H. Lév.) A. Berger Accepted M TRO
Orostachys chlorantha Fisch. [Illegitimate] Synonym M WCSP (in review)
Orostachys chongsunensis Y.N.Lee Unresolved L WCSP (in review)
Orostachys erubescens (Maxim.) Ohwi Synonym M TRO
Orostachys filifera (Nakai) Nakai Unresolved L WCSP (in review)
Orostachys fimbriata (Turcz.) A. Berger Accepted L TRO
Orostachys fimbriata var. grandiflora F.Z. Li & X.D. Chen Synonym L TRO
Orostachys fimbriata var. shandongensis F.Z. Li & X.D. Chen Synonym L TRO
Orostachys furusei Ohwi Unresolved L WCSP (in review)
Orostachys genkaiensis Ohwi Unresolved L WCSP (in review)
Orostachys gorovoii Dudkin & S.B.Gontch. Unresolved L WCSP (in review)
Orostachys iwarenge HARA Accepted M TRO
Orostachys japonica A. Berger Accepted M TRO
Orostachys jiuhuaensis X.H. Guo & X.L. Liu Synonym L TRO
Orostachys kanboensis Ohwi Unresolved L WCSP (in review)
Orostachys komarovii (Raym.-Hamet) V.V.Byalt Unresolved L WCSP (in review)
Orostachys latielliptica Y.N.Lee Unresolved L WCSP (in review)
Orostachys libanotica (L.) Fisch. Unresolved L WCSP (in review)
Orostachys malacophylla (Pall.) Fisch. Accepted M TRO
Orostachys malacophylla subsp. malacophylla Accepted L TRO
Orostachys margaritifolia Y.N.Lee Unresolved L WCSP (in review)
Orostachys maximowiczii V.V.Byalt Unresolved L WCSP (in review)
Orostachys minuta (Kom.) A. Berger Accepted L TRO
Orostachys paradoxa (Khokhr. & Vorosch.) Czerep. Accepted M TRO
Orostachys polycephala (Makino) Hara Unresolved L WCSP (in review)
Orostachys ramosa Y.N.Lee Unresolved L WCSP (in review)
Orostachys ramosissima (Maxim.) V.V. Byalt Synonym L TRO
Orostachys rosea (Less.) A.Berger Unresolved L WCSP (in review)
Orostachys roseus Berger Synonym M TRO
Orostachys saxatilis (Nakai) Nakai Unresolved L WCSP (in review)
Orostachys schoenlandii (Raym.-Hamet) H. Ohba Synonym M TRO
Orostachys serrata Sweet Unresolved L WCSP (in review)
Orostachys sikokiana (Makino) Ohwi Accepted M TRO
Orostachys spinosa (L.) Sweet Accepted M WCSP (in review)
Orostachys stenostachya (Fröd.) H. Ohba Synonym M TRO
Orostachys thyrsiflora Fisch. Accepted M WCSP (in review)
Orostachys umbilicus Schrank & Mart. Unresolved L WCSP (in review)
Orostachys vyschinii Bezd. Unresolved L WCSP (in review)
