This name is a synonym of Echinopsis pentlandii (Hook.) Salm-Dyck ex A.Dietr..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Monatsschr. Kakteenk. 14: 168 1904.
This name record (from WCSP (in review)) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Echinopsis pentlandii in version 1 of The Plant List.