Lophophora lewinii:

Lophophora lewinii:

Lophophora lewinii (Henn. ex Lewin) C. H. Thomps.
Bot. syn.: Lophophora williamsii (Lem. ex Salm-Dyck) J. M. Coult.

I have no articles for this botanical term, but there might be some for the next level down (if found).