This name is a synonym of Argyrochosma dealbata (Pursh) Windham.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26605237) with original publication details: Bot. Jahrb. Syst. 3: 417 1882.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17170780-1.
This name was in version 1 of The Plant List, record tro-26605237.