⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Spiraea callosa in version 1.1 of The Plant List.
This name is a synonym of Spiraea japonica var. glabra .
The record derives from Tropicos which reports it as a synonym (record 27808434
) with original publication details: Index Sem. (St. Petersburg) 1869(Suppl.): 27 27 1870.