This name is a synonym of Parvisedum pumilum (Benth.) R.T. Clausen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8900239) with original publication details: Pl. Hartw. 310–311 1849.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:231845-2.
This name was in version 1 of The Plant List, record tro-8900239, and has not been changed.