This name is a synonym of Pachystachys spicata (Ruiz & Pav.) Wassh..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 103110) with original publication details: Prodr. 11: 320 1847.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:52811-1.
This name was in version 1 of The Plant List, record tro-103110, and has not been changed.