This name is a synonym of Physaria multiceps (Maguire) O'Kane & Al-Shehbaz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50116588) with original publication details: Amer. Midl. Naturalist 27(2): 465–466 1942.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:138805-2.
This name was in version 1 of The Plant List, record tro-50116588, and has not been changed.