This name is a synonym of Heliconia subulata subsp. gracilis (Petersen) L.Andersson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 248541) with original publication details: Fl. Bras. 3(3): 22 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:119452-2.
This name was in version 1 of The Plant List, record kew-248541, and has not been changed.