This name is a synonym of Cyanea obtusa (A.Gray) Hillebr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 368237) with original publication details: Bull. Torrey Bot. Club 44: 237 1917.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:141973-1.
This name was in version 1 of The Plant List, record kew-368237, and has not been changed.