⚠ Version 1 of The Plant List has been superseded.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 Isodon forrestii in version 1.1 of The Plant List.
This name is a synonym of Isodon megathyrsus var. megathyrsus .
The record derives from Tropicos which reports it as a synonym (record 17607478
) with original publication details: Mem. Fac. Sci. Taihoku Imp. Univ. 2: 131 131 1929.