This name is a synonym of Amaranthus tuberculatus (Moq.) Sauer.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Prodr. 13(2): 278 1849.
This name was in version 1 of The Plant List, record kew-2632744, and has not been changed.