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 26602341) with original publication details: Amer. J. Sci. Arts, ser. 2 6: 82 1848.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17163630-1.
This name was in version 1 of The Plant List, record tro-26602341.