This name is a synonym of Herniaria hirsuta subsp. cinerea (DC.) Cout..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Fl. Franç. ed. 3, 6: 375 1815.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:434783-1.
This name was in version 1 of The Plant List, record kew-2846906.