This name is a synonym of Astilbe rubra Hook.f. & Thomson.
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: Enum. Pl. Jap. 1: 144 1873.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:790271-1.
This name was in version 1 of The Plant List, record kew-2656728, and has not been changed.