Grusonia aggeria (Ralston & Hilsenb.) E. F. Anderson species accepted

Grusonia bulbispina (Engelm.) H. Rob. species accepted

Grusonia clavata (Engelm.) H. Rob. species accepted

Grusonia emoryi (Engelm.) Pinkava species accepted

Grusonia grahamii (Engelm.) H. Rob. species accepted

Grusonia invicta (Brandegee) E. F. Anderson species accepted

Grusonia kunzei (Rose) Pinkava species accepted

Grusonia marenae (S. H. Parsons) E. F. Anderson species accepted

Grusonia moelleri (A. Berger) E. F. Anderson species accepted

Grusonia reflexispina (Wiggins & Rollins) E. F. Anderson species accepted

Grusonia robertsii Rebman species accepted

Grusonia schottii (Engelm.) H. Rob. species accepted

Grusonia deinacantha species accepted

Grusonia halophila species accepted

Grusonia vilis (Rose) H. Rob. species accepted

Grusonia nigrispina (D. Donati) M. H. J. van der Meer species accepted

Grusonia guccinii (D. Donati) Bárcenas & H. M. Hern. species accepted

Grusonia bradtiana (J. M. Coult.) Britton & Rose species accepted

Grusonia parishiorum (Orcutt ex Britton & Rose) Pinkava species accepted