⚠ Version 1 of The Plant List has been superseded.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 Clematis acuminata in version 1.1 of The Plant List.
This name is a synonym of Clematis siamensis var. siamensis .
The record derives from Tropicos which reports it as a synonym (record 27104459
) with original publication details: Acta Horti Gothob. 13(4): 194-195 194 1939.