This name is a synonym of Cryptantha ambigua (A.Gray) Greene.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Syn. Fl. N. Amer. 2(1): 194 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:96131-2.
This name was in version 1 of The Plant List, record kew-2797849.