This name is a synonym of Apocynum pictum Schrenk.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 12873) with original publication details: Notul. Syst. (Paris) 2: 137 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77172-1.
This name was in version 1 of The Plant List, record kew-12873, and has not been changed.