This name is a synonym of Holodiscus discolor (Pursh) Maxim..
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 5664) with original publication details: A flora of California A flora of California; 1909 166 1936.
This name record (from RJP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Holodiscus discolor in version 1 of The Plant List.