This name is a synonym of Geranium cuneatum subsp. hypoleucum (A.Gray) Carlquist & Bissing.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: U.S. Expl. Exped., Phan. 1: 312 1854.
This name was in version 1 of The Plant List, record kew-2823127, and has not been changed.