This name is a synonym of Modiolastrum gilliesii (Steud.) Krapov..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 19600456) with original publication details: Linnaea 5: 226 1830.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:561673-1.
This name was in version 1 of The Plant List, record tro-19600456.