This name is a synonym of Rheum tanguticum Maxim. ex Balf..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50136384) with original publication details: Bot. Mag. 153: t. 9200 1927.
This name was in version 1 of The Plant List, record tro-50136384.