This name is a synonym of Spiraea media Schmidt.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 14857) with original publication details: Die strauchigen Spir„en Die strauchigen Spir„en; 1893 33 1893.
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 Spiraea media in version 1 of The Plant List.