This name is a synonym of Rheum australe D. Don.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50136335) with original publication details: Pl. Asiat. Rar. 3: 65 1832.
This name was in version 1 of The Plant List, record tro-50136335, and has not been changed.